Controlling light-matter interactions via cavity systems manifested by Rabi splitting is paramount important for nanophotonics. However, achieving conveniently accessible and active tuning of light-matter interactions remains a formidable challenge. Traditional approaches often necessitate either sophisticated design or meticulous nanofabrication to address this issue. Here, a handy strategy is experimentally demonstrated to build an adjustable coupling system featuring reversibly modulated responses based on dielectric-hydrogel-metal resonators. By controlling the top tungsten disulfide layer thickness, the flexible manipulation of weak-intermediate-strong transitions in exciton-cavity interactions is revealed on a large-scale hydrogel membrane without nanopositioning or lithography. Crucially, by leveraging the inflation sensitivity of the hydrogel, the coupling strength can be reversibly tailored with excellent reproducibility by modulating the resonator's dry/immersed states. The combined merits of captivating design and daily stimulus render the novel hydrogel-based nanocavities as a groundbreaking step toward the development of active and practical integrated optical devices, such as polariton lasing, switches, and sensors.
{"title":"Highly Reversible Tuning of Light-Matter Interactions in Van der Waals Materials Coupled with Hydrogel-Assisted Optical Cavity","authors":"Lanxin Xu, Jiaqi Wang, Zishun Li, Peng Xie, Qi Ding, Minghao An, Yingjie Zhao, Yiheng Tang, Lan Li, Chengchen Guo, Wei Wang, Xiaorui Zheng","doi":"10.1002/lpor.202401263","DOIUrl":"https://doi.org/10.1002/lpor.202401263","url":null,"abstract":"Controlling light-matter interactions via cavity systems manifested by Rabi splitting is paramount important for nanophotonics. However, achieving conveniently accessible and active tuning of light-matter interactions remains a formidable challenge. Traditional approaches often necessitate either sophisticated design or meticulous nanofabrication to address this issue. Here, a handy strategy is experimentally demonstrated to build an adjustable coupling system featuring reversibly modulated responses based on dielectric-hydrogel-metal resonators. By controlling the top tungsten disulfide layer thickness, the flexible manipulation of weak-intermediate-strong transitions in exciton-cavity interactions is revealed on a large-scale hydrogel membrane without nanopositioning or lithography. Crucially, by leveraging the inflation sensitivity of the hydrogel, the coupling strength can be reversibly tailored with excellent reproducibility by modulating the resonator's dry/immersed states. The combined merits of captivating design and daily stimulus render the novel hydrogel-based nanocavities as a groundbreaking step toward the development of active and practical integrated optical devices, such as polariton lasing, switches, and sensors.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"227 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670410","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}
Lingzhi Peng, Liqiang Liu, Xiaoni Li, Lihong Hong, Zhiyuan Li
Lithium niobate thin film (LNTF) is a promising platform for ultra-low loss nonlinear integrated photonics. Here, the simultaneous generation of second harmonic wave (SHW) and dispersive wave (DW) are demonstrated in a single LNTF under the pump of a femtosecond pulse laser, with a conversion efficiency exceeding 25%. The second harmonic generation (SHG) uses the modal phase matching mechanism based on the second-order nonlinear effect, while the DW generation is based on the perturbations of soliton dynamics caused by self-phase modulation and higher-order dispersion. Notably, significant and symmetrical SHW and DW patterns are observed, which exhibit strong spatial dispersion properties. A comprehensive analysis of the phase-matching conditions are conducted for SHG and DW generation and provide a clear elucidation of the spectral properties of different regions of the emitted light patterns. Additionally, the evolution of the pump light in LNTF is thoroughly investigated, and the solutions of the generalized Schrödinger equation are in good agreement with these experimental results. This work sheds new light on the rich physics of nonlinear optical interactions on LNTF, and by utilizing the synergistic effect of second-order and third-order nonlinear effects, this study anticipates achieving efficient and high energy on-chip broadband frequency conversion and supercontinuum generation across octaves.
{"title":"Efficient Simultaneous Second Harmonic Generation and Dispersive Wave Generation in Lithium Niobate Thin Film","authors":"Lingzhi Peng, Liqiang Liu, Xiaoni Li, Lihong Hong, Zhiyuan Li","doi":"10.1002/lpor.202400335","DOIUrl":"https://doi.org/10.1002/lpor.202400335","url":null,"abstract":"Lithium niobate thin film (LNTF) is a promising platform for ultra-low loss nonlinear integrated photonics. Here, the simultaneous generation of second harmonic wave (SHW) and dispersive wave (DW) are demonstrated in a single LNTF under the pump of a femtosecond pulse laser, with a conversion efficiency exceeding 25%. The second harmonic generation (SHG) uses the modal phase matching mechanism based on the second-order nonlinear effect, while the DW generation is based on the perturbations of soliton dynamics caused by self-phase modulation and higher-order dispersion. Notably, significant and symmetrical SHW and DW patterns are observed, which exhibit strong spatial dispersion properties. A comprehensive analysis of the phase-matching conditions are conducted for SHG and DW generation and provide a clear elucidation of the spectral properties of different regions of the emitted light patterns. Additionally, the evolution of the pump light in LNTF is thoroughly investigated, and the solutions of the generalized Schrödinger equation are in good agreement with these experimental results. This work sheds new light on the rich physics of nonlinear optical interactions on LNTF, and by utilizing the synergistic effect of second-order and third-order nonlinear effects, this study anticipates achieving efficient and high energy on-chip broadband frequency conversion and supercontinuum generation across octaves.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"76 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645859","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}
Jianxing Zhou, Yuhang Peng, Jiajie Chen, Xiaoqi Dai, Yili Zhong, Peng Du, Zhengtian Jin, Yinyue Ji, Yuye Wang, Ho Pui Ho, Junle Qu, Yonghong Shao
Colloidal photonic crystals (CPCs) are extensively utilized in nanoscale light manipulation due to their periodic dielectric structure. However, achieving spatial reconfigurability in CPCs remains a significant challenge, despite its importance for broader photonic applications in colloidal science. In this study, an optically induced thermoelectric field is generated by adding ionic surfactants to the solution, leading to the efficient formation of tightly assembled nanoparticles that exhibit the characteristics of CPC, which is termed optothermo-CPC. Specifically, this CPC exhibits excellent spatial reconfigurability through the tuning of the optically induced thermoelectric field. This allows for the remote control of its position and shape, in a real-time and high-precision manner. Additionally, by changing the particle size, it is possible to tune the transmission spectrum and color. Additionally, optothermo-CPC can navigate obstacles and possess a robust self-healing ability. These highly adaptable and reconfigurable properties endow CPCs with significant potential for various photonic applications within complex fluidic environments.
{"title":"Optothermal-Enabled Reconfigurable Colloidal Photonic Crystals for Color and Spectrum Manipulation","authors":"Jianxing Zhou, Yuhang Peng, Jiajie Chen, Xiaoqi Dai, Yili Zhong, Peng Du, Zhengtian Jin, Yinyue Ji, Yuye Wang, Ho Pui Ho, Junle Qu, Yonghong Shao","doi":"10.1002/lpor.202400889","DOIUrl":"https://doi.org/10.1002/lpor.202400889","url":null,"abstract":"Colloidal photonic crystals (CPCs) are extensively utilized in nanoscale light manipulation due to their periodic dielectric structure. However, achieving spatial reconfigurability in CPCs remains a significant challenge, despite its importance for broader photonic applications in colloidal science. In this study, an optically induced thermoelectric field is generated by adding ionic surfactants to the solution, leading to the efficient formation of tightly assembled nanoparticles that exhibit the characteristics of CPC, which is termed optothermo-CPC. Specifically, this CPC exhibits excellent spatial reconfigurability through the tuning of the optically induced thermoelectric field. This allows for the remote control of its position and shape, in a real-time and high-precision manner. Additionally, by changing the particle size, it is possible to tune the transmission spectrum and color. Additionally, optothermo-CPC can navigate obstacles and possess a robust self-healing ability. These highly adaptable and reconfigurable properties endow CPCs with significant potential for various photonic applications within complex fluidic environments.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645877","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}
Exciton–polariton condensates featuring collective coherence and large nonlinearities are promising for advancing coherent light sources and functional devices. Nevertheless, their reliance on planar cavities with large lateral device footprints and mode volumes hinders device integration. Plasmon–exciton–polaritons (PEPs), arising from the strong coupling between excitons and plasmons, provide an intriguing platform to explore emergent polariton condensation at the nanoscale due to their ultrasmall mode volumes in metal nanoparticles. However, the substantial radiative and Ohmic losses in metals hamper PEPs condensation, particularly in the short wavelength range (<600 nm). Here, a method is proposed to address metal losses by integrating organic semiconductor neat films onto plasmonic lattices. The use of organic semiconductors with large transition dipole moment and low non-radiation loss enables efficient coupling between massive excitons and lattice plasmons, leading to high-density PEPs. This ensures a macroscopic number of polaritons populating the low-lying band edge at relatively low fluences to obtain bosonic stimulation, resulting in PEP condensation. By tailoring the band structures of plasmonic lattices, the condensation of PEPs are further manipulated into different energy states. These findings offer valuable insights for the design of PEP systems and all-optical polaritonic devices.
具有集体相干性和大非线性特征的激子-极化子凝聚态有望推动相干光源和功能器件的发展。然而，它们对具有较大横向器件足迹和模式体积的平面腔体的依赖阻碍了器件的集成。质子-激子-极化子（PEPs）产生于激子和质子之间的强耦合，由于其在金属纳米粒子中的超小模式体积，为探索纳米尺度的新兴极化子凝聚提供了一个有趣的平台。然而，金属中大量的辐射损耗和欧姆损耗阻碍了极化子的凝聚，尤其是在短波长范围内（600 纳米）。在此，我们提出了一种通过在等离子晶格上集成有机半导体整洁薄膜来解决金属损耗问题的方法。使用具有大过渡偶极矩和低非辐射损耗的有机半导体可实现大质量激子与晶格质子之间的高效耦合，从而产生高密度的 PEPs。这确保了在相对较低的通量下就有大量的极化子填充低洼带边，从而获得玻色子刺激，导致 PEP 凝聚。通过调整质子晶格的能带结构，PEP 的凝聚可进一步被操纵为不同的能态。这些发现为设计 PEP 系统和全光偏振器件提供了宝贵的见解。
{"title":"Plasmon–Exciton–Polariton Condensation in Organic Semiconductor-Covered Plasmonic Lattices","authors":"Shuang Wen, Ang Ren, Haidi Liu, Zhengjun Jiang, Xinyu Dong, Haiyun Dong, Jiannian Yao, Yongli Yan, Yong Sheng Zhao","doi":"10.1002/lpor.202401308","DOIUrl":"https://doi.org/10.1002/lpor.202401308","url":null,"abstract":"Exciton–polariton condensates featuring collective coherence and large nonlinearities are promising for advancing coherent light sources and functional devices. Nevertheless, their reliance on planar cavities with large lateral device footprints and mode volumes hinders device integration. Plasmon–exciton–polaritons (PEPs), arising from the strong coupling between excitons and plasmons, provide an intriguing platform to explore emergent polariton condensation at the nanoscale due to their ultrasmall mode volumes in metal nanoparticles. However, the substantial radiative and Ohmic losses in metals hamper PEPs condensation, particularly in the short wavelength range (<600 nm). Here, a method is proposed to address metal losses by integrating organic semiconductor neat films onto plasmonic lattices. The use of organic semiconductors with large transition dipole moment and low non-radiation loss enables efficient coupling between massive excitons and lattice plasmons, leading to high-density PEPs. This ensures a macroscopic number of polaritons populating the low-lying band edge at relatively low fluences to obtain bosonic stimulation, resulting in PEP condensation. By tailoring the band structures of plasmonic lattices, the condensation of PEPs are further manipulated into different energy states. These findings offer valuable insights for the design of PEP systems and all-optical polaritonic devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"248 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645863","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}
The diffraction efficiency of blaze gratings is optimized only at a specific frequency due to a fixed blaze angle, resulting in reduced and variable diffraction efficiencies over the working frequency band. Additionally, blazed gratings demonstrate polarization dependence due to their groove structures and the interaction of light with their surfaces. Consequently, designing gratings with constant diffraction efficiencies across a wide frequency bandwidth while maintaining polarization independence remains a challenge. Here, a design paradigm of dispersion engineerable meta-grating inspired by orthogonal harmonic oscillations (OHO) is presented. Utilizing the OHO model, the phase dispersion of a metasurface can be precisely controlled, which applies to any unit cell featuring two orthogonal electromagnetic resonances. As a proof of concept, a polarization-insensitive meta-grating is showcased, where the blazed angle adapts with the incident frequency, ensuring broadband performance. In the experiment, the adaptively-blazed grating measured an optimized and constant diffraction efficiency of ≈80% over the working wavelength range, i.e., 8.7–12.2 µm. The difference in diffraction efficiency between the two perpendicular linear polarization states remains within 4.6%. The proposed paradigm paves the way for meta-device design based on precise dispersion engineering, which has potential applications in spectrometers, broadband beam forming and steering, hyperspectral imaging, etc.
{"title":"A Polarization-Insensitive and Adaptively-Blazed Meta-Grating Based on Dispersive Metasurfaces","authors":"Guanxing Zang, Zhijun Liu, Shilun Feng, Weiming Zhu","doi":"10.1002/lpor.202401031","DOIUrl":"https://doi.org/10.1002/lpor.202401031","url":null,"abstract":"The diffraction efficiency of blaze gratings is optimized only at a specific frequency due to a fixed blaze angle, resulting in reduced and variable diffraction efficiencies over the working frequency band. Additionally, blazed gratings demonstrate polarization dependence due to their groove structures and the interaction of light with their surfaces. Consequently, designing gratings with constant diffraction efficiencies across a wide frequency bandwidth while maintaining polarization independence remains a challenge. Here, a design paradigm of dispersion engineerable meta-grating inspired by orthogonal harmonic oscillations (OHO) is presented. Utilizing the OHO model, the phase dispersion of a metasurface can be precisely controlled, which applies to any unit cell featuring two orthogonal electromagnetic resonances. As a proof of concept, a polarization-insensitive meta-grating is showcased, where the blazed angle adapts with the incident frequency, ensuring broadband performance. In the experiment, the adaptively-blazed grating measured an optimized and constant diffraction efficiency of ≈80% over the working wavelength range, i.e., 8.7–12.2 µm. The difference in diffraction efficiency between the two perpendicular linear polarization states remains within 4.6%. The proposed paradigm paves the way for meta-device design based on precise dispersion engineering, which has potential applications in spectrometers, broadband beam forming and steering, hyperspectral imaging, etc.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"34 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645858","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}
As the most stable allotrope of phosphorus, violet phosphorus (VP) has attracted extensive research in the field of all-optical modulation due to its excellent broadband spatial self-phase modulation (SSPM) effect. To better exploit the great potential of VP in nonlinear photonics devices, this work explores chemical doping method to artificially enhance the nonlinear optical response of VP. Herein, silver-modified few-layer VP (Ag-VP) is constructed for SSPM experiments. In comparison to pristine VP, a significantly improved third-order nonlinear susceptibility (χ(3)) and nonlinear optical response for Ag-VP is obtained in visible light band, and the enhancement ratio increases with the increase of wavelength. Moreover, the excitation threshold of SSPM effect is also significantly reduced, with a reduction ratio up to 3.61. The enhanced nonlinear optical response is attributed to the improved light–matter interaction induced by impurity energy levels. By taking advantage of the outstanding SSPM effect of Ag-VP, an all-optical logic gate is designed to demonstrate “OR” logical information transmission. This work provides a new avenue for the design and application of energy-saving and tunable nonlinear photonic devices in the future.
{"title":"Large Optical Nonlinearity Enhancement and All-Optical Logic Gate Implementation in Silver-Modified Violet Phosphorus","authors":"Xiaodan Xu, Zexin Cui, Yifan Yang, Yaqing Zhang, Qifan Li, Lihua Tong, Jun Li, Xinzheng Zhang, Yanling Wu","doi":"10.1002/lpor.202401521","DOIUrl":"https://doi.org/10.1002/lpor.202401521","url":null,"abstract":"As the most stable allotrope of phosphorus, violet phosphorus (VP) has attracted extensive research in the field of all-optical modulation due to its excellent broadband spatial self-phase modulation (SSPM) effect. To better exploit the great potential of VP in nonlinear photonics devices, this work explores chemical doping method to artificially enhance the nonlinear optical response of VP. Herein, silver-modified few-layer VP (Ag-VP) is constructed for SSPM experiments. In comparison to pristine VP, a significantly improved third-order nonlinear susceptibility (<i>χ</i><sup>(3)</sup>) and nonlinear optical response for Ag-VP is obtained in visible light band, and the enhancement ratio increases with the increase of wavelength. Moreover, the excitation threshold of SSPM effect is also significantly reduced, with a reduction ratio up to 3.61. The enhanced nonlinear optical response is attributed to the improved light–matter interaction induced by impurity energy levels. By taking advantage of the outstanding SSPM effect of Ag-VP, an all-optical logic gate is designed to demonstrate “OR” logical information transmission. This work provides a new avenue for the design and application of energy-saving and tunable nonlinear photonic devices in the future.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"112 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645861","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}
Lead halide perovskites have emerged as attractive X-ray detector materials, owing to properties such as strong X-ray stopping power, excellent carrier transport, and high sensitivity. Additionally, they can be easily prepared by using solution-based synthesis approaches. However, traditional 3D (three-dimensional) perovskites X-ray detectors have shown limited application due to high dark currents generated under bias voltage as a result of strong ion migration. In this work, an X-ray detector with a vertical structure device is demonstrated using 2D (two-dimensional) histamine lead halide perovskite single crystal HAPbI4 (HPI, HA = histamine). Due to the dielectric screening effect of diamine and the vertical structure of the HPI device, the fabricated detector shows a sensitivity of 7737 µC Gyair−1 cm−2 under a bias voltage of 30 V. Furthermore, the detector shows a sensitivity of 293 µC Gyair−1 cm−2 and detection limit of 51.38 nGyair s−1 without bias voltage, wherein the dark current is almost completely suppressed. All of these properties indicate the X-ray detection device is a promising candidate for next-generation optoelectronic applications.
卤化铅包晶石具有强大的 X 射线阻挡能力、出色的载流子传输和高灵敏度等特性，已成为极具吸引力的 X 射线探测器材料。此外，它们还可以通过溶液合成法轻松制备。然而，传统的三维（three-dimensional）包云石 X 射线探测器由于离子迁移强而在偏置电压下产生高暗电流，因此应用有限。在这项研究中，利用二维组胺卤化铅包晶石单晶 HAPbI4（HPI，HA = 组胺）展示了一种垂直结构器件的 X 射线探测器。由于二胺的介电屏蔽效应和 HPI 器件的垂直结构，在 30 V 的偏置电压下，所制造的探测器显示出 7737 µC Gyair-1 cm-2 的灵敏度。此外，该探测器在无偏压情况下的灵敏度为 293 µC Gyair-1 cm-2，探测极限为 51.38 nGyair s-1，暗电流几乎完全被抑制。所有这些特性表明，该 X 射线探测装置有望成为下一代光电应用的候选器件。
{"title":"Dark Current Suppression in Two-dimensional Histamine Lead Iodine Perovskite Single Crystal for X-ray Detection and Imaging","authors":"Jun'an Lai, Sijun Cao, Shiji Zhou, Peng He, Kang An, Peng Feng, Daofu Wu, Yongqiang Zhou, Mengyue Wu, Qiang Huang, Xiaosheng Tang","doi":"10.1002/lpor.202401365","DOIUrl":"https://doi.org/10.1002/lpor.202401365","url":null,"abstract":"Lead halide perovskites have emerged as attractive X-ray detector materials, owing to properties such as strong X-ray stopping power, excellent carrier transport, and high sensitivity. Additionally, they can be easily prepared by using solution-based synthesis approaches. However, traditional 3D (three-dimensional) perovskites X-ray detectors have shown limited application due to high dark currents generated under bias voltage as a result of strong ion migration. In this work, an X-ray detector with a vertical structure device is demonstrated using 2D (two-dimensional) histamine lead halide perovskite single crystal HAPbI<sub>4</sub> (HPI, HA = histamine). Due to the dielectric screening effect of diamine and the vertical structure of the HPI device, the fabricated detector shows a sensitivity of 7737 µC Gy<sub>air</sub><sup>−1</sup> cm<sup>−2</sup> under a bias voltage of 30 V. Furthermore, the detector shows a sensitivity of 293 µC Gy<sub>air</sub><sup>−1</sup> cm<sup>−2</sup> and detection limit of 51.38 nGy<sub>air</sub> s<sup>−1</sup> without bias voltage, wherein the dark current is almost completely suppressed. All of these properties indicate the X-ray detection device is a promising candidate for next-generation optoelectronic applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"8 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645862","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}
Junzi Li, Zhihang Guo, Meiting Wang, Yonghong Shao, Yi Chen, Yan Qin, Wenjing Zhang, Changshun Wang, Hao Jin, Luyang Wang, Tingchao He
The inherent structural flexibility and chiroptical activity of 2D chiral perovskites make them promising for the nonlinear optical (NLO) application. A comprehensive understanding of the second-harmonic generation (SHG) mechanism in 2D chiral perovskites is essential for developing NLO devices. However, the rational design of 2D chiral perovskite structures to regulate SHG properties remains challenging. Herein, to regulate SHG response, an achiral organic spacer cation alloying strategy is employed to construct a series of 2D chiral perovskites. Through the measurement of temperature-dependent photoluminescence (PL) spectra, it is revealed that the material design strategy can effectively modulating self-trapped exciton (STE) emission. More importantly, it is confirmed that there is a competitive relationship between STE emission and SHG in 2D chiral perovskites. Meanwhile, the microscopic imaging of circularly polarized-SHG is demonstrated in chiral perovskites. This work will not only advance the understanding of the SHG mechanism in 2D chiral perovskites but also provide inspiration for the rational design and synthesis of perovskites for NLO devices.
{"title":"Regulating Second-Harmonic Generation in 2D Chiral Perovskites Through Achiral Organic Spacer Cation Alloying Strategy","authors":"Junzi Li, Zhihang Guo, Meiting Wang, Yonghong Shao, Yi Chen, Yan Qin, Wenjing Zhang, Changshun Wang, Hao Jin, Luyang Wang, Tingchao He","doi":"10.1002/lpor.202401379","DOIUrl":"https://doi.org/10.1002/lpor.202401379","url":null,"abstract":"The inherent structural flexibility and chiroptical activity of 2D chiral perovskites make them promising for the nonlinear optical (NLO) application. A comprehensive understanding of the second-harmonic generation (SHG) mechanism in 2D chiral perovskites is essential for developing NLO devices. However, the rational design of 2D chiral perovskite structures to regulate SHG properties remains challenging. Herein, to regulate SHG response, an achiral organic spacer cation alloying strategy is employed to construct a series of 2D chiral perovskites. Through the measurement of temperature-dependent photoluminescence (PL) spectra, it is revealed that the material design strategy can effectively modulating self-trapped exciton (STE) emission. More importantly, it is confirmed that there is a competitive relationship between STE emission and SHG in 2D chiral perovskites. Meanwhile, the microscopic imaging of circularly polarized-SHG is demonstrated in chiral perovskites. This work will not only advance the understanding of the SHG mechanism in 2D chiral perovskites but also provide inspiration for the rational design and synthesis of perovskites for NLO devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"51 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645857","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}
Yang Wu, Tianyu Sun, Mingrui Shao, Chang Ji, Chonghui Li, Chao Zhang, Zhen Li
The fabrication of reusable SERS substrates with sensitivity at the single-molecule level remains challenging but promising. Herein, a composite surface-enhanced Raman scattering (SERS) substrate is proposed that includes Ag nanoparticle (Ag NPs) /Graphene/BaTiO3 (Ag/G/BTO) from a chemical enhancement perspective. The pyroelectric field generated by BaTiO3 drives the charge transfer between the SERS substrate and molecules, achieving a significant improvement in the SERS performance and self-cleaning properties. The SERS signals of rhodamine 6G (R6G) molecules are further amplified up to 70-fold. Thus, the detection limit is reduced by three orders of magnitude in this study, reaching 10−14m after applying a pyroelectric field. In addition, the substrate exhibits a higher degradation efficiency than previous self-cleaning SERS substrates because of the outstanding catalytic properties of BaTiO3. Target molecules are degraded effectively after several temperature cycles. A detailed mechanism analysis of pyroelectric SERS is conducted based on theoretical simulations and experimental results. This study is considered to deepen the understanding of SERS mechanisms and boost the application of SERS technology.
{"title":"Pyroelectrically Driven Charge Transfer and its Advantages on SERS and Self-Cleaning Property","authors":"Yang Wu, Tianyu Sun, Mingrui Shao, Chang Ji, Chonghui Li, Chao Zhang, Zhen Li","doi":"10.1002/lpor.202401152","DOIUrl":"https://doi.org/10.1002/lpor.202401152","url":null,"abstract":"The fabrication of reusable SERS substrates with sensitivity at the single-molecule level remains challenging but promising. Herein, a composite surface-enhanced Raman scattering (SERS) substrate is proposed that includes Ag nanoparticle (Ag NPs) /Graphene/BaTiO<sub>3</sub> (Ag/G/BTO) from a chemical enhancement perspective. The pyroelectric field generated by BaTiO<sub>3</sub> drives the charge transfer between the SERS substrate and molecules, achieving a significant improvement in the SERS performance and self-cleaning properties. The SERS signals of rhodamine 6G (R6G) molecules are further amplified up to 70-fold. Thus, the detection limit is reduced by three orders of magnitude in this study, reaching 10<sup>−14</sup> <span>m</span> after applying a pyroelectric field. In addition, the substrate exhibits a higher degradation efficiency than previous self-cleaning SERS substrates because of the outstanding catalytic properties of BaTiO<sub>3</sub>. Target molecules are degraded effectively after several temperature cycles. A detailed mechanism analysis of pyroelectric SERS is conducted based on theoretical simulations and experimental results. This study is considered to deepen the understanding of SERS mechanisms and boost the application of SERS technology.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"7 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645860","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}
Although the performance of quantum dot light-emitting diodes (QLEDs) has been greatly improved in recent years, the multilayer device structure has become increasingly complex, limiting the practical application of QLEDs. Here, a novel trilayer PIN QLED with only three functional layers, which are Spiro-OMeTAD:TFB bulk-heterojunction (BHJ) hole transport layer (HTL), quantum-dot emitting layer and ZnMgO electron transport layer is demonstrated. Due to the enhanced hole injection capability and suppressed electron leakage of Spiro-OMeTAD:TFB BHJ HTL, the trilayer PIN QLED can show an excellent external quantum efficiency (EQE) of 25.1% and an impressive brightness of 299300 cd m−2 at only 8 V, which are significantly higher than those of conventional QLED. Moreover, the device stability is also remarkably improved due to the mitigation of hole accumulation and removal of unstable PEDOT:PSS. By using liquid alloy EGaIn as cathode, a fully solution-processed vacuum-free trilayer PIN QLED with a higher EQE of 27.3% can be further realized. The developed trilayer PIN QLEDs, with better performance and fewer functional layers, can promote the commercialization of QLED technology.
{"title":"Efficient and Stable Quantum-Dot Light-Emitting Diodes with Trilayer PIN Architecture","authors":"Zhe Wang, Dawei Yang, Bingsuo Zou, Shuming Chen, Heng Zhang","doi":"10.1002/lpor.202401343","DOIUrl":"https://doi.org/10.1002/lpor.202401343","url":null,"abstract":"Although the performance of quantum dot light-emitting diodes (QLEDs) has been greatly improved in recent years, the multilayer device structure has become increasingly complex, limiting the practical application of QLEDs. Here, a novel trilayer PIN QLED with only three functional layers, which are Spiro-OMeTAD:TFB bulk-heterojunction (BHJ) hole transport layer (HTL), quantum-dot emitting layer and ZnMgO electron transport layer is demonstrated. Due to the enhanced hole injection capability and suppressed electron leakage of Spiro-OMeTAD:TFB BHJ HTL, the trilayer PIN QLED can show an excellent external quantum efficiency (EQE) of 25.1% and an impressive brightness of 299300 cd m<sup>−2</sup> at only 8 V, which are significantly higher than those of conventional QLED. Moreover, the device stability is also remarkably improved due to the mitigation of hole accumulation and removal of unstable PEDOT:PSS. By using liquid alloy EGaIn as cathode, a fully solution-processed vacuum-free trilayer PIN QLED with a higher EQE of 27.3% can be further realized. The developed trilayer PIN QLEDs, with better performance and fewer functional layers, can promote the commercialization of QLED technology.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"5 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637462","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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