Jan Dziewior, Leonardo Ruscio, Lukas Knips, Eric Meyer, Alexander Szameit, Jasmin D. A. Meinecke
Open quantum systems are highly relevant, both for practical applications as well as for fundamental questions about the nature of information and its transfer, encompassing for example decoherence and memory effects. Quantum mechanics introduces additional complexity to the transfer of information, e.g., storage of information in non-classical correlations. Yet, some of these aspects tend to be neglected by the usual framework of open system research. In this work, photons are used in a waveguide array to implement a quantum simulation of the coupling of a qubit with a low-dimensional discrete environment. Using the trace distance between quantum states as a measure of information, different types of information transfer are analyzed. Extending the usual perspective which is focused on the system alone, the presence of information is also investigated in the environment.
{"title":"Tracing Information Flow from Open Quantum Systems","authors":"Jan Dziewior, Leonardo Ruscio, Lukas Knips, Eric Meyer, Alexander Szameit, Jasmin D. A. Meinecke","doi":"10.1002/lpor.202400737","DOIUrl":"https://doi.org/10.1002/lpor.202400737","url":null,"abstract":"Open quantum systems are highly relevant, both for practical applications as well as for fundamental questions about the nature of information and its transfer, encompassing for example decoherence and memory effects. Quantum mechanics introduces additional complexity to the transfer of information, e.g., storage of information in non-classical correlations. Yet, some of these aspects tend to be neglected by the usual framework of open system research. In this work, photons are used in a waveguide array to implement a quantum simulation of the coupling of a qubit with a low-dimensional discrete environment. Using the trace distance between quantum states as a measure of information, different types of information transfer are analyzed. Extending the usual perspective which is focused on the system alone, the presence of information is also investigated in the environment.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"47 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417798","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}
Retinal projection display enables the direct projection of virtual images onto the retina through the pupil center via a projection engine, showing promise in addressing the vergence-accommodation conflict in augmented reality near-eye displays. However, existing RPD architectures universally employ passive luminous micro-electromechanical systems or spatial light modulators, encountering challenges associated with beam aperture limitations and structural inflexibility. In response to these, this paper presents a novel micro-LED retinal projection display architecture that integrates the active luminous full-color micro-LEDs with a pixel-to-pixel imaging fiber bundle, effectively subverting conventional RPD designs. Additionally, the flexible fiber bundle brings an adaptable design that enables optoelectronic separation capabilities. The design principles and feasibility are thoroughly described and validated through simulations and experiments. A full-color µRPD prototype is developed, demonstrating sharp imaging across an extensive focal depth range. Remarkably, the µRPD architecture exhibits a groundbreaking advancement in enabling underwater AR displays without necessitating special waterproof treatments, underscoring its potential versatility and adaptability to challenging environments. This design paves a new way for practical applications of NEDs in complex and demanding conditions, thereby contributing to the evolution of NED systems.
{"title":"Micro-LED Retinal Projection for Augmented Reality Near-Eye Displays","authors":"Huajian Jin, Zijian Lin, Wenzong Lai, Haonan Jiang, Junhu Cai, Hao Chen, Weijie Hao, Yun Ye, Sheng Xu, Qun Yan, Tailiang Guo, Enguo Chen","doi":"10.1002/lpor.202402083","DOIUrl":"https://doi.org/10.1002/lpor.202402083","url":null,"abstract":"Retinal projection display enables the direct projection of virtual images onto the retina through the pupil center via a projection engine, showing promise in addressing the vergence-accommodation conflict in augmented reality near-eye displays. However, existing RPD architectures universally employ passive luminous micro-electromechanical systems or spatial light modulators, encountering challenges associated with beam aperture limitations and structural inflexibility. In response to these, this paper presents a novel micro-LED retinal projection display architecture that integrates the active luminous full-color micro-LEDs with a pixel-to-pixel imaging fiber bundle, effectively subverting conventional RPD designs. Additionally, the flexible fiber bundle brings an adaptable design that enables optoelectronic separation capabilities. The design principles and feasibility are thoroughly described and validated through simulations and experiments. A full-color µRPD prototype is developed, demonstrating sharp imaging across an extensive focal depth range. Remarkably, the µRPD architecture exhibits a groundbreaking advancement in enabling underwater AR displays without necessitating special waterproof treatments, underscoring its potential versatility and adaptability to challenging environments. This design paves a new way for practical applications of NEDs in complex and demanding conditions, thereby contributing to the evolution of NED systems.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"78 3 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143401537","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}
Diffractive neural networks hold great promise for applications requiring intensive computational processing. Considerable attention is focused on diffractive networks for either spatially coherent or spatially incoherent illumination. Here, it is illustrated that, as opposed to imaging systems, in diffractive networks the degree of spatial coherence has a dramatic effect. In particular, it is showed that when the spatial coherence length on the object is comparable to the minimal feature size preserved by the optical system, neither the incoherent nor the coherent extremes serve as acceptable approximations. Importantly, this situation is inherent to many settings involving active illumination, including reflected light microscopy, autonomous vehicles and smartphones. Following this observation, a general framework is proposed for training diffractive networks for any specified degree of spatial and temporal coherence, supporting all types of linear and nonlinear layers. Using this method, networks are numerically optimized for image classification, and the dependence of their performance on the coherence properties of the illumination is thoroughly investigated. The concept of coherence-blind networks is further introduced, enabling networks, which have enhanced resilience to changes in illumination conditions. These findings serve as a steppingstone toward adopting all-optical neural networks in real-world applications, leveraging nothing but natural light.
{"title":"Coherence Awareness in Diffractive Neural Networks","authors":"Matan Kleiner, Lior Michalei, Tomer Michalei","doi":"10.1002/lpor.202401299","DOIUrl":"https://doi.org/10.1002/lpor.202401299","url":null,"abstract":"Diffractive neural networks hold great promise for applications requiring intensive computational processing. Considerable attention is focused on diffractive networks for either spatially coherent or spatially incoherent illumination. Here, it is illustrated that, as opposed to imaging systems, in diffractive networks the degree of spatial coherence has a dramatic effect. In particular, it is showed that when the spatial coherence length on the object is comparable to the minimal feature size preserved by the optical system, neither the incoherent nor the coherent extremes serve as acceptable approximations. Importantly, this situation is inherent to many settings involving active illumination, including reflected light microscopy, autonomous vehicles and smartphones. Following this observation, a general framework is proposed for training diffractive networks for any specified degree of spatial and temporal coherence, supporting all types of linear and nonlinear layers. Using this method, networks are numerically optimized for image classification, and the dependence of their performance on the coherence properties of the illumination is thoroughly investigated. The concept of coherence-blind networks is further introduced, enabling networks, which have enhanced resilience to changes in illumination conditions. These findings serve as a steppingstone toward adopting all-optical neural networks in real-world applications, leveraging nothing but natural light.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"41 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143401512","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 capability to design spectrally controlled photon emission is not only fundamentally interesting for understanding frequency-encoded light–matter interactions, but also is essential for realizing the preparation and manipulation of quantum states. Here, a dynamically modulated qubit array is considered, and realize frequency-controlled single-photon emission focusing on the generation of a frequency comb constituted solely of even-parity or anti-Stokes sidebands. This system also offers parity-dependent bunching and antibunching in frequency-filtered quantum correlations. In particular, the waveguide quantum electrodynamics (QED) setup is extended to include chiral and non-local coupling architectures, thereby enhancing its versatility in Floquet engineering. This proposal also supports the predictable generation of high-dimensional entangled quantum states, where the corresponding effective Hilbert space dimension is well controlled by energy modulation. Moreover, the utilisation of sophisticated numerical tools, such as the matrix product states (MPSs) and the discretization approach, enables the efficient simulation of multi-photon dynamics, in which the non-Markovian Floquet steady states emerge. This work fundamentally broadens the fields of collective emission, and has wide applications in implementing frequency-encoded quantum information processing and many-body quantum simulation.
{"title":"Floquet Engineering and Harnessing Giant Atoms in Frequency-Comb Emission and Bichromatic Correlations in Waveguide QED","authors":"Qing-Yang Qiu, Li-Li Zheng, Ying Wu, Xin-You Lü","doi":"10.1002/lpor.202401395","DOIUrl":"https://doi.org/10.1002/lpor.202401395","url":null,"abstract":"The capability to design spectrally controlled photon emission is not only fundamentally interesting for understanding frequency-encoded light–matter interactions, but also is essential for realizing the preparation and manipulation of quantum states. Here, a dynamically modulated qubit array is considered, and realize frequency-controlled single-photon emission focusing on the generation of a frequency comb constituted solely of even-parity or anti-Stokes sidebands. This system also offers parity-dependent bunching and antibunching in frequency-filtered quantum correlations. In particular, the waveguide quantum electrodynamics (QED) setup is extended to include chiral and non-local coupling architectures, thereby enhancing its versatility in Floquet engineering. This proposal also supports the predictable generation of high-dimensional entangled quantum states, where the corresponding effective Hilbert space dimension is well controlled by energy modulation. Moreover, the utilisation of sophisticated numerical tools, such as the matrix product states (MPSs) and the discretization approach, enables the efficient simulation of multi-photon dynamics, in which the non-Markovian Floquet steady states emerge. This work fundamentally broadens the fields of collective emission, and has wide applications in implementing frequency-encoded quantum information processing and many-body quantum simulation.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"9 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143401545","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}
Zhefu Liao, Zhenxing Lv, Bin Tang, Ke Sun, Jingjing Jiang, Shengli Qi, Sheng Liu, Shengjun Zhou
AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) are considered promising and efficient solid-state DUV light sources. However, extracting photons directly from high-Al-content AlGaN multiple quantum wells active region where the ratio of transverse magnetic (TM)/transverse electric (TE) polarization emission increases has long been challenging due to the total internal reflection phenomenon and re-absorption effect, leading to the low efficiency of DUV LEDs. Herein, a redirection-manipulated honeycomb inclined reflection system (HIRS) is demonstrated aimed at efficiently extracting TM- and TE-polarized light from DUV LEDs, and systematically analyze the influence of the HIRS configurations on the resulting redirection effect. Crucially, the investigation reveals the effective range of the HIRS redirection effect, prompting the proposal of a pixelation strategy applicable to generalized AlGaN-based DUV LEDs. This strategy is validated through the experimental fabrication of pixelated DUV LEDs integrated with HIRS. Compared to their non-pixelated, non-HIRS counterparts, these pixelated DUV LEDs integrated with HIRS achieve a light output power enhancement factor of up to 1.95, surpassing all previously reported pixelated DUV LEDs. Furthermore, the double-side-coated sapphire is introduced as a package plate to improve reliability and optical performance and develop a miniaturized sterilization module for effective water purification. This work not only provides guidance for high-power AlGaN-based DUV LEDs design and manufacture but also advances the development of efficient solutions for water purification.
{"title":"Redirection-Manipulated Honeycomb Inclined Reflection System Enables Highly Efficient AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes","authors":"Zhefu Liao, Zhenxing Lv, Bin Tang, Ke Sun, Jingjing Jiang, Shengli Qi, Sheng Liu, Shengjun Zhou","doi":"10.1002/lpor.202401698","DOIUrl":"https://doi.org/10.1002/lpor.202401698","url":null,"abstract":"AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) are considered promising and efficient solid-state DUV light sources. However, extracting photons directly from high-Al-content AlGaN multiple quantum wells active region where the ratio of transverse magnetic (TM)/transverse electric (TE) polarization emission increases has long been challenging due to the total internal reflection phenomenon and re-absorption effect, leading to the low efficiency of DUV LEDs. Herein, a redirection-manipulated honeycomb inclined reflection system (HIRS) is demonstrated aimed at efficiently extracting TM- and TE-polarized light from DUV LEDs, and systematically analyze the influence of the HIRS configurations on the resulting redirection effect. Crucially, the investigation reveals the effective range of the HIRS redirection effect, prompting the proposal of a pixelation strategy applicable to generalized AlGaN-based DUV LEDs. This strategy is validated through the experimental fabrication of pixelated DUV LEDs integrated with HIRS. Compared to their non-pixelated, non-HIRS counterparts, these pixelated DUV LEDs integrated with HIRS achieve a light output power enhancement factor of up to 1.95, surpassing all previously reported pixelated DUV LEDs. Furthermore, the double-side-coated sapphire is introduced as a package plate to improve reliability and optical performance and develop a miniaturized sterilization module for effective water purification. This work not only provides guidance for high-power AlGaN-based DUV LEDs design and manufacture but also advances the development of efficient solutions for water purification.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"78 5 Pt 1 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393575","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}
Xiaolong Dong, Xin Zhao, Yuhang Zhang, Maosen Hu, Lifan Shen, Edwin Yue Bun Pun, Hai Lin
Driven by the escalating demand for cutting-edge materials in interactive encryption and customized display, the optimization of excitonic coupling mechanisms in perovskite-based luminescent systems has emerged as a pivotal focus in advanced materials research. Inspired by synergistic doping (SD), a photoswitchable energy transfer channel is realized utilizing the UV-responsive Cs2NaInCl6: Sb3+-Ho3+ (CNIC: Sb-Ho) phosphor. Benefiting from the self-trapped exciton of Sb3+, the visible blue luminescence of Ho3+ achieves excitation reconstruction through SD, with a sensitization coefficient from Sb3+ to Ho3+ in CNIC reaching two orders of magnitude. Notably, CNIC: Sb-Ho quantum dot is embedded into polyacrylonitrile (PAN) and polymethyl methacrylate (PMMA) fibers, respectively, and distinct color coordinate channels are created by altering the doping concentration and fiber matrix, thereby enabling the personalization and the customization of the desired colors with enhanced precision. Furthermore, excellent read-in performance under UV irradiation is achieved by screen-printing CNIC: Sb-Ho microcrystal on nanofibers and combining it with ACSII code, which endows nanofibers with UV-induced controllable shape programming behavior for interactive multidimensional information encryption. This work establishes an enhanced visual interaction framework through effectively integrating perovskite fluorescence tunability and nanofiber adaptive structures, thus opening new possibilities for the smart application of next-generation optical encryption technology.
{"title":"Activate Reconstruction from Sb3+/Ho3+ Synergistic Doping Nanofibers for Interactive Information Encryption and Customized Display","authors":"Xiaolong Dong, Xin Zhao, Yuhang Zhang, Maosen Hu, Lifan Shen, Edwin Yue Bun Pun, Hai Lin","doi":"10.1002/lpor.202402120","DOIUrl":"https://doi.org/10.1002/lpor.202402120","url":null,"abstract":"Driven by the escalating demand for cutting-edge materials in interactive encryption and customized display, the optimization of excitonic coupling mechanisms in perovskite-based luminescent systems has emerged as a pivotal focus in advanced materials research. Inspired by synergistic doping (SD), a photoswitchable energy transfer channel is realized utilizing the UV-responsive Cs<sub>2</sub>NaInCl<sub>6</sub>: Sb<sup>3+</sup>-Ho<sup>3+</sup> (CNIC: Sb-Ho) phosphor. Benefiting from the self-trapped exciton of Sb<sup>3+</sup>, the visible blue luminescence of Ho<sup>3+</sup> achieves excitation reconstruction through SD, with a sensitization coefficient from Sb<sup>3+</sup> to Ho<sup>3+</sup> in CNIC reaching two orders of magnitude. Notably, CNIC: Sb-Ho quantum dot is embedded into polyacrylonitrile (PAN) and polymethyl methacrylate (PMMA) fibers, respectively, and distinct color coordinate channels are created by altering the doping concentration and fiber matrix, thereby enabling the personalization and the customization of the desired colors with enhanced precision. Furthermore, excellent read-in performance under UV irradiation is achieved by screen-printing CNIC: Sb-Ho microcrystal on nanofibers and combining it with ACSII code, which endows nanofibers with UV-induced controllable shape programming behavior for interactive multidimensional information encryption. This work establishes an enhanced visual interaction framework through effectively integrating perovskite fluorescence tunability and nanofiber adaptive structures, thus opening new possibilities for the smart application of next-generation optical encryption technology.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"7 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393766","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}
0D organic Cu(I) halides have gained much attention for their fascinating optical properties. However, the narrow excitation in the UV region, strong afterglow, and poor stability severely limit their applications. Herein, three 0D organic Cu(I) halides of [Ba2(18-crown-6)2]Cu4Cl8·H3PO3·6H2O (Compound-Cl), [Ba(18-crown-6)2]Cu4Br6·CH3OH·H2O (Compound-Br), and [Ba(18-crown-6)2]Cu4I6·H3PO2·H2O (Compound-I) are synthesized via supramolecular assembly. Compared to Compound-Cl with poor stability and Compound-Br with feeble photoluminescence quantum yield (PLQY), Compound-I exhibits broadband blue light excitation characteristics, excellent stability, and efficient yellow emission with a PLQY of 99.4%. A high-performance single-component white light emitting diode is fabricated by coating Compound-I powders on a 460 nm chip, which shows ultra-high luminous efficiency of 106 lm W−1. Under X-ray irradiation, Compound-I has a high light yield of 87 100 photons MeV−1 and a low detection limit of 45.9 nGairy s−1. Moreover, the Compound-I scintillation screen is made using a cold pressing method, which shows a spatial resolution of 20.6 lp mm−1. Based on the remarkable optical properties and short decay lifetime of 1.9 µs of Compound-I, the 3D image reconstruction of screws wrapped in capsule by combining real-time dynamic white light and X-ray image fusion, as well as multi-angle imaging is successfully demonstrated.
{"title":"Supramolecular Assembly of Organic Cu(I) Halides with Efficient Broad Emission for Real-Time Dynamic High-Resolution White Light and X-Ray Image Fusion and 3D Image Reconstruction","authors":"Hui Peng, Shengji Yuan, Qilin Wei, Linghang Kong, Wenjie Huang, Fei Wang, Jialong Zhao, Bingsuo Zou","doi":"10.1002/lpor.202401773","DOIUrl":"https://doi.org/10.1002/lpor.202401773","url":null,"abstract":"0D organic Cu(I) halides have gained much attention for their fascinating optical properties. However, the narrow excitation in the UV region, strong afterglow, and poor stability severely limit their applications. Herein, three 0D organic Cu(I) halides of [Ba<sub>2</sub>(18-crown-6)<sub>2</sub>]Cu<sub>4</sub>Cl<sub>8</sub>·H<sub>3</sub>PO<sub>3</sub>·6H<sub>2</sub>O (Compound-Cl), [Ba(18-crown-6)<sub>2</sub>]Cu<sub>4</sub>Br<sub>6</sub>·CH<sub>3</sub>OH·H<sub>2</sub>O (Compound-Br), and [Ba(18-crown-6)<sub>2</sub>]Cu<sub>4</sub>I<sub>6</sub>·H<sub>3</sub>PO<sub>2</sub>·H<sub>2</sub>O (Compound-I) are synthesized via supramolecular assembly. Compared to Compound-Cl with poor stability and Compound-Br with feeble photoluminescence quantum yield (PLQY), Compound-I exhibits broadband blue light excitation characteristics, excellent stability, and efficient yellow emission with a PLQY of 99.4%. A high-performance single-component white light emitting diode is fabricated by coating Compound-I powders on a 460 nm chip, which shows ultra-high luminous efficiency of 106 lm W<sup>−1</sup>. Under X-ray irradiation, Compound-I has a high light yield of 87 100 photons MeV<sup>−1</sup> and a low detection limit of 45.9 nG<sub>air</sub>y s<sup>−1</sup>. Moreover, the Compound-I scintillation screen is made using a cold pressing method, which shows a spatial resolution of 20.6 lp mm<sup>−1</sup>. Based on the remarkable optical properties and short decay lifetime of 1.9 µs of Compound-I, the 3D image reconstruction of screws wrapped in capsule by combining real-time dynamic white light and X-ray image fusion, as well as multi-angle imaging is successfully demonstrated.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"6 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393574","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}
Liang Ma, Fei Fan, Jixin Feng, Peng Shen, Hang Yin, Yunyun Ji, Xianghui Wang, Shengjiang Chang
Optical coherence with high precision and sensitivity holds achievements in communication, metrology, and sensing. The optical vernier effect generated by the dual-comb interference highlights coherence technology to heighten accuracy and sensitivity, particularly in the visible and infrared bands. However, the maturity in the frequency domain of the optical coherence may overshadow its attributes in the time domain, which are limited to enhancing comprehensive performance. This work provides a lag compensation technology in the time domain that enables hyperfine interference spectrum and vernier ultra-resolution, verified by a cascading terahertz dual-comb interferometer. This strategy proves a 71.4 times improvement in the vernier resolution beyond the intrinsic resolution, reaching the Nyquist sampling limit without necessitating unique optical materials or compromising device geometry. Furthermore, a universal Lag-Interference-Sensitivity correlation is established to guide an ultra-sensitivity of 1.4 × 104 GHz·RIU−1 within the 0.2–1 THz range, defying two orders of magnitude compared to the existing reports. Finally, the application in biochemical sensing, reaching a sensitivity of 2.63 GHz·mm2·ng−1 and an accuracy of 0.59 ng·mm−2, outperforming current reports and stimulating further exploration of ultra-sensitive terahertz biochemical on-chip sensors, is demonstrated. This validation proves an appealing scheme for precision metrology and high-resolution vernier sensing.
{"title":"Lag-Compensated Hyperfine Terahertz Dual-Comb Interferometer beyond Intrinsic Resolution and Sensitivity","authors":"Liang Ma, Fei Fan, Jixin Feng, Peng Shen, Hang Yin, Yunyun Ji, Xianghui Wang, Shengjiang Chang","doi":"10.1002/lpor.202401784","DOIUrl":"https://doi.org/10.1002/lpor.202401784","url":null,"abstract":"Optical coherence with high precision and sensitivity holds achievements in communication, metrology, and sensing. The optical vernier effect generated by the dual-comb interference highlights coherence technology to heighten accuracy and sensitivity, particularly in the visible and infrared bands. However, the maturity in the frequency domain of the optical coherence may overshadow its attributes in the time domain, which are limited to enhancing comprehensive performance. This work provides a lag compensation technology in the time domain that enables hyperfine interference spectrum and vernier ultra-resolution, verified by a cascading terahertz dual-comb interferometer. This strategy proves a 71.4 times improvement in the vernier resolution beyond the intrinsic resolution, reaching the Nyquist sampling limit without necessitating unique optical materials or compromising device geometry. Furthermore, a universal Lag-Interference-Sensitivity correlation is established to guide an ultra-sensitivity of 1.4 × 10<sup>4</sup> GHz·RIU<sup>−1</sup> within the 0.2–1 THz range, defying two orders of magnitude compared to the existing reports. Finally, the application in biochemical sensing, reaching a sensitivity of 2.63 GHz·mm<sup>2</sup>·ng<sup>−1</sup> and an accuracy of 0.59 ng·mm<sup>−2</sup>, outperforming current reports and stimulating further exploration of ultra-sensitive terahertz biochemical on-chip sensors, is demonstrated. This validation proves an appealing scheme for precision metrology and high-resolution vernier sensing.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"15 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393573","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}
Wenxin Zeng, Zaihua Duan, Yichen Bu, Xing Tang, Jingwen Yang, Zhen Yuan, Yadong Jiang, Huiling Tai
As a special type of photodetectors, the bipolar photodetectors (BPDs) have attracted extensive attention because of their unique positive and negative bipolar outputs, endowing them attractive applications, such as optical communication, logic gate, and imaging. However, there is still insufficient understanding of the working mechanisms and device structures of BPDs, which limits their optoelectronic performances and practical applications. This review focuses on the working principles, constructions, and applications of BPDs. First, the fundamental working principles of BPDs are analyzed based on device structures, including photoconductors, photodiodes, phototransistors, photoelectrochemical photodetectors, and others. Second, the constructions of BPDs based on different materials (2D materials, organic semiconductors, perovskites, III–V compounds, oxides, and selenides) are reviewed, and their optoelectronic performances are discussed. Third, various applications of BPDs are summarized, including optical communication, logic gate, and imaging. Finally, the challenges and prospects are delivered for developing the state-of-the-art BPDs. It can be expected that this review will provide valuable insights and guidance for future research on BPDs.
{"title":"Advances in Bipolar Photodetectors: Working Principles, Constructions, and Applications","authors":"Wenxin Zeng, Zaihua Duan, Yichen Bu, Xing Tang, Jingwen Yang, Zhen Yuan, Yadong Jiang, Huiling Tai","doi":"10.1002/lpor.202402163","DOIUrl":"https://doi.org/10.1002/lpor.202402163","url":null,"abstract":"As a special type of photodetectors, the bipolar photodetectors (BPDs) have attracted extensive attention because of their unique positive and negative bipolar outputs, endowing them attractive applications, such as optical communication, logic gate, and imaging. However, there is still insufficient understanding of the working mechanisms and device structures of BPDs, which limits their optoelectronic performances and practical applications. This review focuses on the working principles, constructions, and applications of BPDs. First, the fundamental working principles of BPDs are analyzed based on device structures, including photoconductors, photodiodes, phototransistors, photoelectrochemical photodetectors, and others. Second, the constructions of BPDs based on different materials (2D materials, organic semiconductors, perovskites, III–V compounds, oxides, and selenides) are reviewed, and their optoelectronic performances are discussed. Third, various applications of BPDs are summarized, including optical communication, logic gate, and imaging. Finally, the challenges and prospects are delivered for developing the state-of-the-art BPDs. It can be expected that this review will provide valuable insights and guidance for future research on BPDs.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"14 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385815","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}
Xin Ye, Yong Ge Wang, Jing Feng Yao, Ying Wang, Cheng Xun Yuan, Zhong Xiang Zhou
Spatiotemporal photonic crystals (STCs) are artificial materials with tunable nonresonant wave amplification in the subwavelength scale, which is induced by the intrinsic mixed gap equipped with a complex Bloch wavenumber and a complex Floquet frequency, paving a new way in light amplification. In this work, the concept of STCs is extended to an active electrically controlled spatiotemporal metasurfaces. It is demonstrated that the spatiotemporal metasurface completely inherits the critical mixed momentum-energy gap of STCs, dictated by the interplay between the temporal modulation with exponential growth and spatial modulation with the exponential decay. Based on the design of spatiotemporal metasurfaces, the possibility of accurately manipulating the mixed bandgap related to surface waves is experimentally confirmed through time modulation, as well as the variability of the transmission properties of electromagnetic waves at the interface.
{"title":"Realization of Spatiotemporal Photonic Crystals Based on Active Metasurface","authors":"Xin Ye, Yong Ge Wang, Jing Feng Yao, Ying Wang, Cheng Xun Yuan, Zhong Xiang Zhou","doi":"10.1002/lpor.202401345","DOIUrl":"https://doi.org/10.1002/lpor.202401345","url":null,"abstract":"Spatiotemporal photonic crystals (STCs) are artificial materials with tunable nonresonant wave amplification in the subwavelength scale, which is induced by the intrinsic mixed gap equipped with a complex Bloch wavenumber and a complex Floquet frequency, paving a new way in light amplification. In this work, the concept of STCs is extended to an active electrically controlled spatiotemporal metasurfaces. It is demonstrated that the spatiotemporal metasurface completely inherits the critical mixed momentum-energy gap of STCs, dictated by the interplay between the temporal modulation with exponential growth and spatial modulation with the exponential decay. Based on the design of spatiotemporal metasurfaces, the possibility of accurately manipulating the mixed bandgap related to surface waves is experimentally confirmed through time modulation, as well as the variability of the transmission properties of electromagnetic waves at the interface.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"27 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385817","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：