Mode‐division multiplexing (MDM) technology, as a new way to increase the communication capacity of a single wavelength carrier, has attracted increasing attention. As a fundamental building block for MDM communication systems, multimode optical switch is playing an important role for routing the increasingly complex network. However, it is still very challenging to achieve a multimode optical switch with high flexibility and low power‐consumption in a large bandwidth. Here, a 1 × 2 dual‐mode optical switch is proposed and experimentally demonstrated, where the E11 and E21 modes can be switched output from either of the two output ports simultaneously or individually with low power‐consumption. For the proposed dual‐mode optical switch, three asymmetric Y‐junctions are used as mode (de)multiplexers, two Mach–Zehnder interferometers form a single‐mode switch matrix, and a 2 × 2 multimode interferometer is used as the waveguide crossing. The device is fabricated with simple photolithography and wet‐etching methods. The measurement results show that the driving powers of the device are lower than 8.4 mW, and the crosstalks are less than −12.4 dB in the wavelength range of 1500–1600 nm. By implementing the dynamic control of resources between the guided modes, the proposed device can greatly improve the flexibility and efficiency of reconfigurable MDM networks.
{"title":"Broadband and Reconfigurable Dual‐Mode Optical Switch with Low Power‐Consumption","authors":"Shijie Sun, Shangrong Li, Yuanhua Che, Tianhang Lian, Yushu Fu, Xibin Wang, Daming Zhang","doi":"10.1002/lpor.202400427","DOIUrl":"https://doi.org/10.1002/lpor.202400427","url":null,"abstract":"Mode‐division multiplexing (MDM) technology, as a new way to increase the communication capacity of a single wavelength carrier, has attracted increasing attention. As a fundamental building block for MDM communication systems, multimode optical switch is playing an important role for routing the increasingly complex network. However, it is still very challenging to achieve a multimode optical switch with high flexibility and low power‐consumption in a large bandwidth. Here, a 1 × 2 dual‐mode optical switch is proposed and experimentally demonstrated, where the E<jats:sub>11</jats:sub> and E<jats:sub>21</jats:sub> modes can be switched output from either of the two output ports simultaneously or individually with low power‐consumption. For the proposed dual‐mode optical switch, three asymmetric Y‐junctions are used as mode (de)multiplexers, two Mach–Zehnder interferometers form a single‐mode switch matrix, and a 2 × 2 multimode interferometer is used as the waveguide crossing. The device is fabricated with simple photolithography and wet‐etching methods. The measurement results show that the driving powers of the device are lower than 8.4 mW, and the crosstalks are less than −12.4 dB in the wavelength range of 1500–1600 nm. By implementing the dynamic control of resources between the guided modes, the proposed device can greatly improve the flexibility and efficiency of reconfigurable MDM networks.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142142381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liukang Bian, Fengren Cao, Han Zhao, Fei Xiang, Haoxuan Sun, Meng Wang, Liang Li
Vertically stacked wavelength modulation bipolar response photodetectors are expected to be applied in various fields because they enable bipolar detection and transmission within one device and do not require harsh operating conditions. However, the as-reported bipolar devices either need to change the detection mode (flipping the device or applying external bias) or have limited application effects. In this study, a self-powered FAPbI3/silicon hybrid visible and near-infrared bipolar response photodetector is reported, and the bipolar response is tuned by controlling the transmittance and interface contact of transparent electrodes. Moreover, unlike for photosensitive layers such as perovskites or organic compounds, the preparation of electrodes does not involve solvents, and array devices with different electrodes can be prepared in microregions without affecting adjacent regions. Then, an encrypted communication system that requires comprehensive consideration of the positive and negative states of different transparent electrode-based devices caused by 650-nm visible and 940-nm near-infrared transmission signals are designed, increasing the difficulty of decryption. A dual-band spectral imaging system that does not require additional voltage driving by combining the reflection of visible light and the penetration ability of near-infrared light is implemented, ensuring miniaturization and high integration of the visual imaging system.
{"title":"Self-Powered Perovskite/Si Bipolar Response Photodetector for Visible and Near-Infrared Dual-Band Imaging and Secure Optical Communication","authors":"Liukang Bian, Fengren Cao, Han Zhao, Fei Xiang, Haoxuan Sun, Meng Wang, Liang Li","doi":"10.1002/lpor.202401331","DOIUrl":"https://doi.org/10.1002/lpor.202401331","url":null,"abstract":"Vertically stacked wavelength modulation bipolar response photodetectors are expected to be applied in various fields because they enable bipolar detection and transmission within one device and do not require harsh operating conditions. However, the as-reported bipolar devices either need to change the detection mode (flipping the device or applying external bias) or have limited application effects. In this study, a self-powered FAPbI<sub>3</sub>/silicon hybrid visible and near-infrared bipolar response photodetector is reported, and the bipolar response is tuned by controlling the transmittance and interface contact of transparent electrodes. Moreover, unlike for photosensitive layers such as perovskites or organic compounds, the preparation of electrodes does not involve solvents, and array devices with different electrodes can be prepared in microregions without affecting adjacent regions. Then, an encrypted communication system that requires comprehensive consideration of the positive and negative states of different transparent electrode-based devices caused by 650-nm visible and 940-nm near-infrared transmission signals are designed, increasing the difficulty of decryption. A dual-band spectral imaging system that does not require additional voltage driving by combining the reflection of visible light and the penetration ability of near-infrared light is implemented, ensuring miniaturization and high integration of the visual imaging system.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Designing fast-response and efficient color converter is of significance for indoor white light-emitting diode (WLED) lighting and visible light communication (i.e., Light Fidelity, LiFi) application. Green-emitting CsPbBr3 quantum dots combined with red organic emitters are promising candidates. However, organic emitters cannot offer an adequate red emission intensity when they have a low weight fraction in the color converter. Herein, a multi-site contacted CsPbBr3/organic color converter is fabricated with an efficient red emission via an in situ solid-phase fabrication technique. It is found that the multi-site contacted color converter has a 2.1 times higher red emission intensity compared to the physically mixed hybrid due to a more efficient energy transfer from CsPbBr3 to organic emitters. Resultantly, the multi-site contacted WLED exhibits a color rendering index (CRI) of 86 and a luminous efficacy (LE) of 100 lm W−1, which are much higher than the physically mixed hybrid with a CRI of 49 and a LE of 60 lm W−1. In addition, WLEDs present a superior visible light communication capability, evidenced by an opened-eye diagram at the data rate of 5 Mbps. This study indicates the design and fabrication of perovskite/organic color converter are significant for constructing efficient and fast-response WLEDs for the indoor LiFi application.
{"title":"In Situ Fabrication of Multi-Site Contacted Perovskite/Organic Hybrid Color Converter for Indoor Lighting and Light Communication","authors":"Tianliang Yao, Zhi Yang, Linyuan Gu, Jisong Yao, Shalong Wang, Wenxuan Fan, Yingyi Nong, Jizhong Song","doi":"10.1002/lpor.202400758","DOIUrl":"https://doi.org/10.1002/lpor.202400758","url":null,"abstract":"Designing fast-response and efficient color converter is of significance for indoor white light-emitting diode (WLED) lighting and visible light communication (i.e., Light Fidelity, LiFi) application. Green-emitting CsPbBr<sub>3</sub> quantum dots combined with red organic emitters are promising candidates. However, organic emitters cannot offer an adequate red emission intensity when they have a low weight fraction in the color converter. Herein, a multi-site contacted CsPbBr<sub>3</sub>/organic color converter is fabricated with an efficient red emission via an in situ solid-phase fabrication technique. It is found that the multi-site contacted color converter has a 2.1 times higher red emission intensity compared to the physically mixed hybrid due to a more efficient energy transfer from CsPbBr<sub>3</sub> to organic emitters. Resultantly, the multi-site contacted WLED exhibits a color rendering index (CRI) of 86 and a luminous efficacy (LE) of 100 lm W<sup>−1</sup>, which are much higher than the physically mixed hybrid with a CRI of 49 and a LE of 60 lm W<sup>−1</sup>. In addition, WLEDs present a superior visible light communication capability, evidenced by an opened-eye diagram at the data rate of 5 Mbps. This study indicates the design and fabrication of perovskite/organic color converter are significant for constructing efficient and fast-response WLEDs for the indoor LiFi application.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meiyu He, Jiayue Han, Chunyu Li, Chao Han, Xingwei Han, Xiaoyang Du, Hanwen Luo, He Yu, Jun Gou, Zhiming Wu, Jun Wang
One of the main challenges most organic photodiodes (OPDs) facing is to overcome the traditional trade-off between ultralow dark current and high responsivity (R) in existing research. Here, van der Waals multilayer OPD based on water transfer printing method, termed hybrid bulk-heterojunction (BHJ)/planar-heterojunction (PHJ) (B-PHJ) framework, is constructed making certain the high-quality interface and novel two-phase energy band alignment between the active and barrier layer with noise suppression and photovoltaic complement simultaneously. The prepared OPD exhibits the combined advantages of ultralow dark current (0.2 nA cm−2 at −1 V) and high responsivity (0.49 A W−1 at 850 nm). As a result, these superimposed effects enable the device to feature a superior liner dynamic range (LDR) of 210 dB and a specific detectivity of 1014 Jones to address the conventional responsivity-noise trade-off. The results reveal that the balance dynamics of charge transfer and charge blocking in van der Waals hybrid two-phase framework OPD, may inspire the development of next OPDs. Finally, its diverse practical application potential is demonstrated through long-distance misaligned photoplethysmography (PPG) measurement.
大多数有机光电二极管（OPD）面临的主要挑战之一是如何克服现有研究中超低暗电流与高响应率（R）之间的传统权衡。本文基于水转印印刷方法，构建了范德华多层 OPD（称为混合体-异质结（BHJ）/平面-异质结（PHJ）（B-PHJ）框架），确保了活性层和阻挡层之间的高质量界面和新颖的两相能带排列，同时实现了噪声抑制和光电互补。所制备的 OPD 具有超低暗电流（-1 V 时为 0.2 nA cm-2）和高响应率（850 nm 时为 0.49 A W-1）的综合优势。因此，这些叠加效应使该器件具有 210 dB 的超衬底动态范围 (LDR) 和 1014 Jones 的比检测率，从而解决了传统的响应率-噪声权衡问题。研究结果表明，范德瓦耳斯混合两相框架 OPD 中电荷转移和电荷阻滞的平衡动力学可能会启发下一代 OPD 的开发。最后，通过远距离错位光心动图（PPG）测量，展示了其多样化的实际应用潜力。
{"title":"Addressing Responsivity-Noise Trade-Off by Van der Waals Multilayer Two-Phase Heterojunction for Large LDR Organic Photodetectors","authors":"Meiyu He, Jiayue Han, Chunyu Li, Chao Han, Xingwei Han, Xiaoyang Du, Hanwen Luo, He Yu, Jun Gou, Zhiming Wu, Jun Wang","doi":"10.1002/lpor.202400554","DOIUrl":"https://doi.org/10.1002/lpor.202400554","url":null,"abstract":"One of the main challenges most organic photodiodes (OPDs) facing is to overcome the traditional trade-off between ultralow dark current and high responsivity (R) in existing research. Here, van der Waals multilayer OPD based on water transfer printing method, termed hybrid bulk-heterojunction (BHJ)/planar-heterojunction (PHJ) (B-PHJ) framework, is constructed making certain the high-quality interface and novel two-phase energy band alignment between the active and barrier layer with noise suppression and photovoltaic complement simultaneously. The prepared OPD exhibits the combined advantages of ultralow dark current (0.2 nA cm<sup>−2</sup> at −1 V) and high responsivity (0.49 A W<sup>−1</sup> at 850 nm). As a result, these superimposed effects enable the device to feature a superior liner dynamic range (LDR) of 210 dB and a specific detectivity of 10<sup>14</sup> Jones to address the conventional responsivity-noise trade-off. The results reveal that the balance dynamics of charge transfer and charge blocking in van der Waals hybrid two-phase framework OPD, may inspire the development of next OPDs. Finally, its diverse practical application potential is demonstrated through long-distance misaligned photoplethysmography (PPG) measurement.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Achieving continuous tunability, high efficiency, and outstanding thermal stability of near-infrared (NIR) phosphors remains challenging for optoelectronic device fields. To address this issue, a strategy is proposed based on the substitution of both cations and anions in the intermediate spinel structure, which successfully achieved fine-tuning of NIR emission of Mg1+yGa2-yO4-yFy:Fe3+ phosphors with prominent optical characteristics. The NIR emission contains new luminescent centers with random O/F coordination and is successfully constructed. This co-substitution promotes further inversion of the cationic sites and induces atomic disorder, changing the crystal coordination environment and making Fe3+ breakthrough the Laporte selection rule, enabling fine-tuning of Fe3+ emissions in the range of 707–740 nm and broadening of the full width at half maximum by 30 nm. Moreover, the Mg1.15Ga1.85O3.85F0.15:Fe3+ phosphor reached a high quantum yield of 71.6% and presented excellent thermal stability with an emission intensity retention of 81% at 493 K. The emission of the fabricated NIR phosphor-converted light-emitting diodes also matched well with the photosensitive pigment Pfr, demonstrating its feasibility for plant growth lighting applications.
{"title":"Fine-Tuning of Near-Infrared Emission in Fe-Activated Spinel Phosphors via the Synergistic Effect of Sites Inversion and Atomic Disorder","authors":"Yulong Ye, Heyi Yang, Liang Liang, Qinan Mao, Fangyi Zhao, Yiwen Zhu, Meijiao Liu, Jiasong Zhong","doi":"10.1002/lpor.202400966","DOIUrl":"https://doi.org/10.1002/lpor.202400966","url":null,"abstract":"Achieving continuous tunability, high efficiency, and outstanding thermal stability of near-infrared (NIR) phosphors remains challenging for optoelectronic device fields. To address this issue, a strategy is proposed based on the substitution of both cations and anions in the intermediate spinel structure, which successfully achieved fine-tuning of NIR emission of Mg<sub>1+y</sub>Ga<sub>2-y</sub>O<sub>4-y</sub>F<sub>y</sub>:Fe<sup>3+</sup> phosphors with prominent optical characteristics. The NIR emission contains new luminescent centers with random O/F coordination and is successfully constructed. This co-substitution promotes further inversion of the cationic sites and induces atomic disorder, changing the crystal coordination environment and making Fe<sup>3+</sup> breakthrough the Laporte selection rule, enabling fine-tuning of Fe<sup>3+</sup> emissions in the range of 707–740 nm and broadening of the full width at half maximum by 30 nm. Moreover, the Mg<sub>1.15</sub>Ga<sub>1.85</sub>O<sub>3.85</sub>F<sub>0.15</sub>:Fe<sup>3+</sup> phosphor reached a high quantum yield of 71.6% and presented excellent thermal stability with an emission intensity retention of 81% at 493 K. The emission of the fabricated NIR phosphor-converted light-emitting diodes also matched well with the photosensitive pigment P<sub>fr</sub>, demonstrating its feasibility for plant growth lighting applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhi‐Zeng Si, Zhen‐Tao Ju, Long‐Fei Ren, Xue‐Peng Wang, Boris A. Malomed, Chao‐Qing Dai
Buildup and switching mechanisms of solitons in complex nonlinear systems are fundamentally important dynamical regimes. Using a novel strongly nonlinear optical system, including saturable absorber metal‐organic framework (MOF)‐253@Au and a polarization controller (PC), the work reveals a new buildup scenario for “soliton molecules (SMs)”, which includes a long‐duration stage dominated by the emergence of transient noise‐like pulses (NLPs) modes to withstand strong disturbances arising from “turbulence” and extreme nonlinearity in the optical cavity. The switching between SMs and NLPs is controlled by the cavity polarization state. The switching involves the spectral collapse, following spectral oscillations with a variable period, and self‐organization of NLPs, following energy overshoot. This switching mechanism applies to various patterns with single, paired, and clustered pulses. In the multi‐pulses stage, XPM (cross‐phase‐modulation)‐induced interactions between solitons facilitate a specific mode of energy exchange between them, proportional to interaction duration, ensuring pulse stability during and after state transitions. Systematic simulations reveal the effects of the PC's rotation angle and intra‐cavity nonlinearity on the periodic phase transitions between the different soliton states and accurately reproduce the experimentally observed buildup and switching mechanisms. These findings can enhance the fundamental study and points to potential uses in designing information encoding systems.
{"title":"Polarization‐Induced Buildup and Switching Mechanisms for Soliton Molecules Composed of Noise‐Like‐Pulse Transition States","authors":"Zhi‐Zeng Si, Zhen‐Tao Ju, Long‐Fei Ren, Xue‐Peng Wang, Boris A. Malomed, Chao‐Qing Dai","doi":"10.1002/lpor.202401019","DOIUrl":"https://doi.org/10.1002/lpor.202401019","url":null,"abstract":"Buildup and switching mechanisms of solitons in complex nonlinear systems are fundamentally important dynamical regimes. Using a novel strongly nonlinear optical system, including saturable absorber metal‐organic framework (MOF)‐253@Au and a polarization controller (PC), the work reveals a new buildup scenario for “soliton molecules (SMs)”, which includes a long‐duration stage dominated by the emergence of transient noise‐like pulses (NLPs) modes to withstand strong disturbances arising from “turbulence” and extreme nonlinearity in the optical cavity. The switching between SMs and NLPs is controlled by the cavity polarization state. The switching involves the spectral collapse, following spectral oscillations with a variable period, and self‐organization of NLPs, following energy overshoot. This switching mechanism applies to various patterns with single, paired, and clustered pulses. In the multi‐pulses stage, XPM (cross‐phase‐modulation)‐induced interactions between solitons facilitate a specific mode of energy exchange between them, proportional to interaction duration, ensuring pulse stability during and after state transitions. Systematic simulations reveal the effects of the PC's rotation angle and intra‐cavity nonlinearity on the periodic phase transitions between the different soliton states and accurately reproduce the experimentally observed buildup and switching mechanisms. These findings can enhance the fundamental study and points to potential uses in designing information encoding systems.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142131039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tongtong Kou, Qilin Wei, Tong Chang, Hua Wang, Wei Zheng, Xiaomei Jiang, Qiang Zhao, Zijian Zhou, Dan Huang, Zhaolai Chen, Liang Wang, Jiang Tang, William W. Yu
All-inorganic Cd-based metal halide is widely studied and applied in the field of optoelectronics due to its superior stability, diverse phase structure, and unique photoelectric properties. However, all-inorganic 0D Cd-based metal halide is not widely studied due to their extreme synthesis conditions. In this paper, a simple mild solution method is devised to successfully synthesize 0D Cs3CdBr5 by manipulating the crystal growth kinetics. Simultaneously, the influence of the doping element Mn on the transition matrix and the optical properties are investigated. By doping with an appropriate concentration of Mn2+, a green emission (520 nm) with photoluminescence quantum yield (PLQY) as high as 97.39% is obtained. Benefiting from near-unity PLQY and the excellent optical properties, the white emitting light-emitting diodes (WLEDs) with Cs3CdBr5:20%Mn as green phosphor exhibit warm white light emission with color rendering index (CRI) of 91 and correlated color temperature (CCT) of 4108 K. In addition, Cs3CdBr5:20%Mn also demonstrates excellent X-ray scintillation properties with a low detection limit of 32.83 nGyair·s−1. The results show that Cs3CdBr5:Mn is not only a promising candidate for solid-state lighting but also a promising candidate for low-dose high-resolution X-ray imaging.
全无机镉基金属卤化物因其卓越的稳定性、多样的相结构和独特的光电特性，在光电领域得到了广泛的研究和应用。然而，全无机 0D Cd 基金属卤化物因其极端的合成条件而未被广泛研究。本文设计了一种简单的温和溶液法，通过操纵晶体生长动力学成功合成了 0D Cs3CdBr5。同时，研究了掺杂元素锰对过渡基质和光学特性的影响。通过掺杂适当浓度的 Mn2+，获得了光致发光量子产率（PLQY）高达 97.39% 的绿色发射（520 nm）。得益于近乎统一的 PLQY 和优异的光学特性，以 Cs3CdBr5:20%Mn 为绿色荧光粉的白光发光二极管（WLED）可发出暖白光，显色指数（CRI）为 91，相关色温（CCT）为 4108 K。研究结果表明，Cs3CdBr5:Mn 不仅是固态照明的理想候选材料，也是低剂量高分辨率 X 射线成像的理想候选材料。
{"title":"A Mild Synthesis of 0D Mn2+-Doped Cs3CdBr5 Metal Halide for White Light-Emitting Diodes and X-Ray Imaging","authors":"Tongtong Kou, Qilin Wei, Tong Chang, Hua Wang, Wei Zheng, Xiaomei Jiang, Qiang Zhao, Zijian Zhou, Dan Huang, Zhaolai Chen, Liang Wang, Jiang Tang, William W. Yu","doi":"10.1002/lpor.202400953","DOIUrl":"https://doi.org/10.1002/lpor.202400953","url":null,"abstract":"All-inorganic Cd-based metal halide is widely studied and applied in the field of optoelectronics due to its superior stability, diverse phase structure, and unique photoelectric properties. However, all-inorganic 0D Cd-based metal halide is not widely studied due to their extreme synthesis conditions. In this paper, a simple mild solution method is devised to successfully synthesize 0D Cs<sub>3</sub>CdBr<sub>5</sub> by manipulating the crystal growth kinetics. Simultaneously, the influence of the doping element Mn on the transition matrix and the optical properties are investigated. By doping with an appropriate concentration of Mn<sup>2+</sup>, a green emission (520 nm) with photoluminescence quantum yield (PLQY) as high as 97.39% is obtained. Benefiting from near-unity PLQY and the excellent optical properties, the white emitting light-emitting diodes (WLEDs) with Cs<sub>3</sub>CdBr<sub>5</sub>:20%Mn as green phosphor exhibit warm white light emission with color rendering index (CRI) of 91 and correlated color temperature (CCT) of 4108 K. In addition, Cs<sub>3</sub>CdBr<sub>5</sub>:20%Mn also demonstrates excellent X-ray scintillation properties with a low detection limit of 32.83 nGy<sub>air</sub>·s<sup>−1</sup>. The results show that Cs<sub>3</sub>CdBr<sub>5</sub>:Mn is not only a promising candidate for solid-state lighting but also a promising candidate for low-dose high-resolution X-ray imaging.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ben Sun, Kun Huang, Huijie Ma, Jianan Fang, Tingting Zheng, Ruiyang Qin, Yongyuan Chu, Hairun Guo, Yan Liang, Heping Zeng
Sensitive mid-infrared (MIR) spectroscopy plays an indispensable role in various photon-starved conditions. However, the detection sensitivity of conventional MIR spectrometers is severely limited by excessive noises of the involved infrared sensors, especially for multi-pixel arrays in parallel spectral acquisition. Here, an ultra-sensitive MIR single-pixel spectrometer is devised and implemented, which relies on high-fidelity spectral upconversion and wavelength-encoding compressive measurement. Specifically, a MIR nanophotonic supercontinuum from 3.1 to 3.9 µm is nonlinearly converted to the NIR band via synchronous chirped-pulse pumping, which facilitates both the precise spectral mapping and sensitive upconversion detection. The upconverted signal is then spatially dispersed onto a programmable digital micromirror device, before being registered by a single-element silicon detector. Consequently, the spectral information can be deciphered from the correlation between encoded patterns and recorded measurements, which results in a spectral resolution of 0.5 <span data-altimg="/cms/asset/863e4674-84af-43c9-9e3f-5d0ea6a1f068/lpor202401099-math-0001.png"></span><mjx-container ctxtmenu_counter="1" ctxtmenu_oldtabindex="1" jax="CHTML" role="application" sre-explorer- style="font-size: 103%; position: relative;" tabindex="0"><mjx-math aria-hidden="true" location="graphic/lpor202401099-math-0001.png"><mjx-semantics><mjx-msup data-semantic-children="0,3" data-semantic- data-semantic-role="unknown" data-semantic-speech="c m Superscript negative 1" data-semantic-type="superscript"><mjx-mi data-semantic-font="normal" data-semantic- data-semantic-parent="4" data-semantic-role="unknown" data-semantic-type="identifier"><mjx-c></mjx-c><mjx-c></mjx-c></mjx-mi><mjx-script style="vertical-align: 0.363em;"><mjx-mrow data-semantic-annotation="clearspeak:simple" data-semantic-children="2" data-semantic-content="1" data-semantic- data-semantic-parent="4" data-semantic-role="negative" data-semantic-type="prefixop" size="s"><mjx-mo data-semantic- data-semantic-operator="prefixop,−" data-semantic-parent="3" data-semantic-role="subtraction" data-semantic-type="operator" rspace="1"><mjx-c></mjx-c></mjx-mo><mjx-mn data-semantic-annotation="clearspeak:simple" data-semantic-font="normal" data-semantic- data-semantic-parent="3" data-semantic-role="integer" data-semantic-type="number"><mjx-c></mjx-c></mjx-mn></mjx-mrow></mjx-script></mjx-msup></mjx-semantics></mjx-math><mjx-assistive-mml display="inline" unselectable="on"><math altimg="urn:x-wiley:18638880:media:lpor202401099:lpor202401099-math-0001" display="inline" location="graphic/lpor202401099-math-0001.png" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><msup data-semantic-="" data-semantic-children="0,3" data-semantic-role="unknown" data-semantic-speech="c m Superscript negative 1" data-semantic-type="superscript"><mi data-semantic-="" data-semantic-font="normal" data-semantic-parent="4" data-semantic-role="unk
{"title":"Mid-Infrared Single-Photon Compressive Spectroscopy","authors":"Ben Sun, Kun Huang, Huijie Ma, Jianan Fang, Tingting Zheng, Ruiyang Qin, Yongyuan Chu, Hairun Guo, Yan Liang, Heping Zeng","doi":"10.1002/lpor.202401099","DOIUrl":"https://doi.org/10.1002/lpor.202401099","url":null,"abstract":"Sensitive mid-infrared (MIR) spectroscopy plays an indispensable role in various photon-starved conditions. However, the detection sensitivity of conventional MIR spectrometers is severely limited by excessive noises of the involved infrared sensors, especially for multi-pixel arrays in parallel spectral acquisition. Here, an ultra-sensitive MIR single-pixel spectrometer is devised and implemented, which relies on high-fidelity spectral upconversion and wavelength-encoding compressive measurement. Specifically, a MIR nanophotonic supercontinuum from 3.1 to 3.9 µm is nonlinearly converted to the NIR band via synchronous chirped-pulse pumping, which facilitates both the precise spectral mapping and sensitive upconversion detection. The upconverted signal is then spatially dispersed onto a programmable digital micromirror device, before being registered by a single-element silicon detector. Consequently, the spectral information can be deciphered from the correlation between encoded patterns and recorded measurements, which results in a spectral resolution of 0.5 <span data-altimg=\"/cms/asset/863e4674-84af-43c9-9e3f-5d0ea6a1f068/lpor202401099-math-0001.png\"></span><mjx-container ctxtmenu_counter=\"1\" ctxtmenu_oldtabindex=\"1\" jax=\"CHTML\" role=\"application\" sre-explorer- style=\"font-size: 103%; position: relative;\" tabindex=\"0\"><mjx-math aria-hidden=\"true\" location=\"graphic/lpor202401099-math-0001.png\"><mjx-semantics><mjx-msup data-semantic-children=\"0,3\" data-semantic- data-semantic-role=\"unknown\" data-semantic-speech=\"c m Superscript negative 1\" data-semantic-type=\"superscript\"><mjx-mi data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"4\" data-semantic-role=\"unknown\" data-semantic-type=\"identifier\"><mjx-c></mjx-c><mjx-c></mjx-c></mjx-mi><mjx-script style=\"vertical-align: 0.363em;\"><mjx-mrow data-semantic-annotation=\"clearspeak:simple\" data-semantic-children=\"2\" data-semantic-content=\"1\" data-semantic- data-semantic-parent=\"4\" data-semantic-role=\"negative\" data-semantic-type=\"prefixop\" size=\"s\"><mjx-mo data-semantic- data-semantic-operator=\"prefixop,−\" data-semantic-parent=\"3\" data-semantic-role=\"subtraction\" data-semantic-type=\"operator\" rspace=\"1\"><mjx-c></mjx-c></mjx-mo><mjx-mn data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"3\" data-semantic-role=\"integer\" data-semantic-type=\"number\"><mjx-c></mjx-c></mjx-mn></mjx-mrow></mjx-script></mjx-msup></mjx-semantics></mjx-math><mjx-assistive-mml display=\"inline\" unselectable=\"on\"><math altimg=\"urn:x-wiley:18638880:media:lpor202401099:lpor202401099-math-0001\" display=\"inline\" location=\"graphic/lpor202401099-math-0001.png\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><semantics><msup data-semantic-=\"\" data-semantic-children=\"0,3\" data-semantic-role=\"unknown\" data-semantic-speech=\"c m Superscript negative 1\" data-semantic-type=\"superscript\"><mi data-semantic-=\"\" data-semantic-font=\"normal\" data-semantic-parent=\"4\" data-semantic-role=\"unk","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wei-Jiang Wu, Yi-Pu Wang, Jie Li, Gang Li, Jian-Qiang You
Quantum computing, quantum communication, and quantum networks rely on hybrid quantum systems operating in different frequency ranges. For instance, the superconducting qubits work in the gigahertz range, while the optical photons used in communication are in the range of hundreds of terahertz. Due to the large frequency mismatch, achieving the direct coupling and information exchange between different information carriers is generally difficult. Accordingly, a quantum interface is demanded, which serves as a bridge to establish information linkage between different quantum systems operating at distinct frequencies. Recently, the magnon mode in ferromagnetic spin systems has received significant attention. While the inherent weak optomagnonic coupling strength restricts the microwave-to-optical photon conversion efficiency using magnons, the versatility of the magnon modes, together with their readily achievable strong coupling with other quantum systems, endow them with many distinct advantages. Here, the magnon-based microwave-light interface is realized by adopting an optical cavity with adjustable free spectrum range and different kinds of magnetostatic modes in two microwave cavity configurations. By optimizing the parameters, a conversion efficiency of <span data-altimg="/cms/asset/a38b58f9-3294-4cf5-846d-7a404ae65165/lpor202400648-math-0001.png"></span><mjx-container ctxtmenu_counter="1" ctxtmenu_oldtabindex="1" jax="CHTML" role="application" sre-explorer- style="font-size: 103%; position: relative;" tabindex="0"><mjx-math aria-hidden="true" location="graphic/lpor202400648-math-0001.png"><mjx-semantics><mjx-mrow data-semantic-children="0,6" data-semantic-content="1" data-semantic- data-semantic-role="unknown" data-semantic-speech="1.75 times 10 Superscript negative 8" data-semantic-type="infixop"><mjx-mn data-semantic-annotation="clearspeak:simple" data-semantic-font="normal" data-semantic- data-semantic-parent="7" data-semantic-role="float" data-semantic-type="number"><mjx-c></mjx-c><mjx-c></mjx-c><mjx-c></mjx-c><mjx-c></mjx-c></mjx-mn><mjx-mo data-semantic- data-semantic-operator="infixop,×" data-semantic-parent="7" data-semantic-role="unknown" data-semantic-type="operator" rspace="4" space="4"><mjx-c></mjx-c></mjx-mo><mjx-msup data-semantic-children="2,5" data-semantic- data-semantic-parent="7" data-semantic-role="integer" data-semantic-type="superscript"><mjx-mn data-semantic-annotation="clearspeak:simple" data-semantic-font="normal" data-semantic- data-semantic-parent="6" data-semantic-role="integer" data-semantic-type="number"><mjx-c></mjx-c><mjx-c></mjx-c></mjx-mn><mjx-script style="vertical-align: 0.393em;"><mjx-mrow data-semantic-annotation="clearspeak:simple" data-semantic-children="4" data-semantic-content="3" data-semantic- data-semantic-parent="6" data-semantic-role="negative" data-semantic-type="prefixop" size="s"><mjx-mo data-semantic- data-semantic-operator="prefixop,−" data-semantic-parent="5" data-semantic-role="subtracti
{"title":"Microwave-to-Optics Conversion Using Magnetostatic Modes and a Tunable Optical Cavity","authors":"Wei-Jiang Wu, Yi-Pu Wang, Jie Li, Gang Li, Jian-Qiang You","doi":"10.1002/lpor.202400648","DOIUrl":"https://doi.org/10.1002/lpor.202400648","url":null,"abstract":"Quantum computing, quantum communication, and quantum networks rely on hybrid quantum systems operating in different frequency ranges. For instance, the superconducting qubits work in the gigahertz range, while the optical photons used in communication are in the range of hundreds of terahertz. Due to the large frequency mismatch, achieving the direct coupling and information exchange between different information carriers is generally difficult. Accordingly, a quantum interface is demanded, which serves as a bridge to establish information linkage between different quantum systems operating at distinct frequencies. Recently, the magnon mode in ferromagnetic spin systems has received significant attention. While the inherent weak optomagnonic coupling strength restricts the microwave-to-optical photon conversion efficiency using magnons, the versatility of the magnon modes, together with their readily achievable strong coupling with other quantum systems, endow them with many distinct advantages. Here, the magnon-based microwave-light interface is realized by adopting an optical cavity with adjustable free spectrum range and different kinds of magnetostatic modes in two microwave cavity configurations. By optimizing the parameters, a conversion efficiency of <span data-altimg=\"/cms/asset/a38b58f9-3294-4cf5-846d-7a404ae65165/lpor202400648-math-0001.png\"></span><mjx-container ctxtmenu_counter=\"1\" ctxtmenu_oldtabindex=\"1\" jax=\"CHTML\" role=\"application\" sre-explorer- style=\"font-size: 103%; position: relative;\" tabindex=\"0\"><mjx-math aria-hidden=\"true\" location=\"graphic/lpor202400648-math-0001.png\"><mjx-semantics><mjx-mrow data-semantic-children=\"0,6\" data-semantic-content=\"1\" data-semantic- data-semantic-role=\"unknown\" data-semantic-speech=\"1.75 times 10 Superscript negative 8\" data-semantic-type=\"infixop\"><mjx-mn data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"7\" data-semantic-role=\"float\" data-semantic-type=\"number\"><mjx-c></mjx-c><mjx-c></mjx-c><mjx-c></mjx-c><mjx-c></mjx-c></mjx-mn><mjx-mo data-semantic- data-semantic-operator=\"infixop,×\" data-semantic-parent=\"7\" data-semantic-role=\"unknown\" data-semantic-type=\"operator\" rspace=\"4\" space=\"4\"><mjx-c></mjx-c></mjx-mo><mjx-msup data-semantic-children=\"2,5\" data-semantic- data-semantic-parent=\"7\" data-semantic-role=\"integer\" data-semantic-type=\"superscript\"><mjx-mn data-semantic-annotation=\"clearspeak:simple\" data-semantic-font=\"normal\" data-semantic- data-semantic-parent=\"6\" data-semantic-role=\"integer\" data-semantic-type=\"number\"><mjx-c></mjx-c><mjx-c></mjx-c></mjx-mn><mjx-script style=\"vertical-align: 0.393em;\"><mjx-mrow data-semantic-annotation=\"clearspeak:simple\" data-semantic-children=\"4\" data-semantic-content=\"3\" data-semantic- data-semantic-parent=\"6\" data-semantic-role=\"negative\" data-semantic-type=\"prefixop\" size=\"s\"><mjx-mo data-semantic- data-semantic-operator=\"prefixop,−\" data-semantic-parent=\"5\" data-semantic-role=\"subtracti","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Steganography technology which conceals a message in a carrier to make it invisible is critical for information security. Conventional optical image steganography using diffractive optical components or spatial light modulators suffers from less encoding channel and bulky volume. The emergence of multifunctional metasurface that can manipulate abundant physical dimensions of optical fields allows the multi‐channel image steganography in a compact volume. Here, the image hiding in a metasurface is demonstrated by modulating the amplitude, phase, and polarization states of terahertz (THz) waves completely. Especially, the phase channel can decouple from the amplitude channel based on a Fresnel‐diffraction‐based algorithm. By directly measuring the phase distribution using the homemade THz focal plane imaging system, the number of transmission channels can expand from N to 2N. As a proof of concept, it is shown that the secret images can encode in the phase channel and subsequently extract by using different keys, such as polarization states, detection distances, and its combinations. Moreover, different hiding strategies with different attacker behaviors are also demonstrated. The decoupling of the phase and amplitude channels with a single metasurface may open an avenue toward innovative optoelectronic devices for optical image steganography, data storage, and terahertz communication.
将信息隐藏在载体中使其不可见的隐写技术对信息安全至关重要。使用衍射光学元件或空间光调制器的传统光学图像隐写术存在编码通道少、体积大的问题。多功能元表面的出现，可以操纵丰富的光场物理尺寸，从而在紧凑的体积内实现多通道图像隐写术。在这里，通过完全调制太赫兹（THz）波的振幅、相位和偏振态，演示了在元表面中隐藏图像的方法。特别是，基于菲涅尔衍射算法，相位通道可以与振幅通道解耦。通过使用自制的太赫兹焦平面成像系统直接测量相位分布，传输通道的数量可以从 N 个扩展到 2N。作为概念验证，研究表明秘密图像可以编码在相位信道中，然后通过不同的密钥（如偏振态、探测距离及其组合）提取出来。此外，还演示了具有不同攻击者行为的不同隐藏策略。利用单一元表面实现相位和振幅信道的解耦，可为光学图像隐写术、数据存储和太赫兹通信领域的创新光电设备开辟一条道路。
{"title":"Decoupling of Phase and Amplitude Channels with a Terahertz Metasurface Toward High‐Security Image Hiding","authors":"Huan Zhao, Tong Nan, Xinke Wang, Siyuan Liu, Zhuo Chen, Yungang Sang, Yu Wang, Chunrui Han, Yan Zhang","doi":"10.1002/lpor.202400944","DOIUrl":"https://doi.org/10.1002/lpor.202400944","url":null,"abstract":"Steganography technology which conceals a message in a carrier to make it invisible is critical for information security. Conventional optical image steganography using diffractive optical components or spatial light modulators suffers from less encoding channel and bulky volume. The emergence of multifunctional metasurface that can manipulate abundant physical dimensions of optical fields allows the multi‐channel image steganography in a compact volume. Here, the image hiding in a metasurface is demonstrated by modulating the amplitude, phase, and polarization states of terahertz (THz) waves completely. Especially, the phase channel can decouple from the amplitude channel based on a Fresnel‐diffraction‐based algorithm. By directly measuring the phase distribution using the homemade THz focal plane imaging system, the number of transmission channels can expand from N to 2N. As a proof of concept, it is shown that the secret images can encode in the phase channel and subsequently extract by using different keys, such as polarization states, detection distances, and its combinations. Moreover, different hiding strategies with different attacker behaviors are also demonstrated. The decoupling of the phase and amplitude channels with a single metasurface may open an avenue toward innovative optoelectronic devices for optical image steganography, data storage, and terahertz communication.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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