Shaofeng Wen, Changyong Lan, Rui Zhang, Shuren Zhou, Chun Li, Yi Yin, Johnny C. Ho, Yong Liu
Polarization photodetectors offer significant potential in target recognition, quantum physics, and astronomical observations. However, conventional polarization photodetectors often require additional optical components, increasing the devices' complexity and size. Moreover, the limited polarization ratio in photodetectors utilizing anisotropic materials presents a major challenge, hindering their practical applications. In this study, we introduce an innovative approach using a vertically aligned back‐to‐back Schottky barrier structure, with anisotropic 2D material as the photosensitive unit, to develop a polarization photodetector with an infinite polarization ratio. The distinct differences in light absorption for x ‐ and y ‐polarizations are crucial in creating a 90° shift in polarization‐dependent photocurrents between the top and bottom Schottky diodes. This feature allows for precise modulation of the polarization ratio through bias voltage adjustment, enabling a transition from a finite value to infinity. Significantly high polarization ratios are achieved in ReSe 2 ‐ and PdPSe‐based devices, with values of 2.89 × 10 4 and 300, respectively. Our research offers a simplified design for polarization photodetectors with an infinite polarization ratio, presenting significant potential for advancements in optoelectronics.
{"title":"Achieving Infinite Polarization Ratio in Photodetectors Using In‐Plane Anisotropic 2D Materials and Back‐to‐Back Schottky Structures","authors":"Shaofeng Wen, Changyong Lan, Rui Zhang, Shuren Zhou, Chun Li, Yi Yin, Johnny C. Ho, Yong Liu","doi":"10.1002/lpor.202502842","DOIUrl":"https://doi.org/10.1002/lpor.202502842","url":null,"abstract":"Polarization photodetectors offer significant potential in target recognition, quantum physics, and astronomical observations. However, conventional polarization photodetectors often require additional optical components, increasing the devices' complexity and size. Moreover, the limited polarization ratio in photodetectors utilizing anisotropic materials presents a major challenge, hindering their practical applications. In this study, we introduce an innovative approach using a vertically aligned back‐to‐back Schottky barrier structure, with anisotropic 2D material as the photosensitive unit, to develop a polarization photodetector with an infinite polarization ratio. The distinct differences in light absorption for <jats:italic>x</jats:italic> ‐ and <jats:italic>y</jats:italic> ‐polarizations are crucial in creating a 90° shift in polarization‐dependent photocurrents between the top and bottom Schottky diodes. This feature allows for precise modulation of the polarization ratio through bias voltage adjustment, enabling a transition from a finite value to infinity. Significantly high polarization ratios are achieved in ReSe <jats:sub>2</jats:sub> ‐ and PdPSe‐based devices, with values of 2.89 × 10 <jats:sup>4</jats:sup> and 300, respectively. Our research offers a simplified design for polarization photodetectors with an infinite polarization ratio, presenting significant potential for advancements in optoelectronics.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"8 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145897442","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}
Vira R. Besaga, Ivan V. Lopushenko, Oleksii Sieryi, Alexander Bykov, Frank Setzpfandt, Igor Meglinski
Polarimetry with quantum light promises improved measurements for various scenarios. However, fundamental understanding of quantum photonic state transport in complex, real media, and tools to interpret the state after interaction with the sample are still lacking. Here, we theoretically and experimentally explore the evolution of polarization‐entangled states in a turbid medium on example of tissue phantoms. By elaborating mathematical relationship between Wolf's coherency matrix and density matrix, we introduce a versatile framework describing the transfer of entangled photons in turbid environments with polarization tracking and resulting quantum state representation with the density operator. Experimentally, we reveal a robust trend in the state evolution depending on the reduced scattering coefficient of the medium. Our theoretical predictions correlate with experimental findings, while the model extends the study by photonic states with different degrees of entanglement. The presented results pave the way for quantitative quantum photonic sensing enabling applications ranging from biomedical diagnostics to remote sensing.
{"title":"Bridging Classical and Quantum Approaches for Quantitative Sensing of Turbid Media with Polarization‐Entangled Photons","authors":"Vira R. Besaga, Ivan V. Lopushenko, Oleksii Sieryi, Alexander Bykov, Frank Setzpfandt, Igor Meglinski","doi":"10.1002/lpor.202501172","DOIUrl":"https://doi.org/10.1002/lpor.202501172","url":null,"abstract":"Polarimetry with quantum light promises improved measurements for various scenarios. However, fundamental understanding of quantum photonic state transport in complex, real media, and tools to interpret the state after interaction with the sample are still lacking. Here, we theoretically and experimentally explore the evolution of polarization‐entangled states in a turbid medium on example of tissue phantoms. By elaborating mathematical relationship between Wolf's coherency matrix and density matrix, we introduce a versatile framework describing the transfer of entangled photons in turbid environments with polarization tracking and resulting quantum state representation with the density operator. Experimentally, we reveal a robust trend in the state evolution depending on the reduced scattering coefficient of the medium. Our theoretical predictions correlate with experimental findings, while the model extends the study by photonic states with different degrees of entanglement. The presented results pave the way for quantitative quantum photonic sensing enabling applications ranging from biomedical diagnostics to remote sensing.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"90 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145897474","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}
Bound states in the continuum (BICs) are an intriguing phenomenon as they are accompanied by theoretically infinite quality factors ( Q factors), but restricted by the moderate wavevector range, thus impeding the physical realization and utilization. Although merging BICs provides an effective strategy to broaden the high‐ Q region in momentum space, it requires fine tuning of two optical singularities to approach each other closely, and the achievable high‐ Q bandwidth remains limited due to momentum mismatch. To overcome this contradiction, we demonstrate a kind of general BICs off the high‐symmetry lines in honeycomb‐lattice photonic crystal slabs, which are induced by the Dirac points regulated by topological charge conservation. These general BICs ensure high‐ Q resonances over an expanded momentum‐space range, effectively mitigating fabrication imperfections. Furthermore, distinct from the interactions between circular points (C points) of opposite chirality with identical topological charges or of the same chirality with opposite charges, we uncover another case involving C points with opposite chirality and topological charge by breaking the C 6z rotational symmetry. These findings reveal the rich interplay among symmetry, topology, and degeneracy in photonic crystals, offering deeper insights into chiral optics and facilitating high‐ Q photonic devices.
{"title":"Topological Expansion of the High‐ Q Region in Momentum Space via Dirac‐Point‐Induced BICs","authors":"Xiao Zhang, JiPeng Xu, ZhiHong Zhu","doi":"10.1002/lpor.202502969","DOIUrl":"https://doi.org/10.1002/lpor.202502969","url":null,"abstract":"Bound states in the continuum (BICs) are an intriguing phenomenon as they are accompanied by theoretically infinite quality factors ( <jats:italic>Q</jats:italic> factors), but restricted by the moderate wavevector range, thus impeding the physical realization and utilization. Although merging BICs provides an effective strategy to broaden the high‐ <jats:italic>Q</jats:italic> region in momentum space, it requires fine tuning of two optical singularities to approach each other closely, and the achievable high‐ <jats:italic>Q</jats:italic> bandwidth remains limited due to momentum mismatch. To overcome this contradiction, we demonstrate a kind of general BICs off the high‐symmetry lines in honeycomb‐lattice photonic crystal slabs, which are induced by the Dirac points regulated by topological charge conservation. These general BICs ensure high‐ <jats:italic>Q</jats:italic> resonances over an expanded momentum‐space range, effectively mitigating fabrication imperfections. Furthermore, distinct from the interactions between circular points (C points) of opposite chirality with identical topological charges or of the same chirality with opposite charges, we uncover another case involving C points with opposite chirality and topological charge by breaking the C <jats:sub>6</jats:sub> <jats:italic> <jats:sub>z</jats:sub> </jats:italic> rotational symmetry. These findings reveal the rich interplay among symmetry, topology, and degeneracy in photonic crystals, offering deeper insights into chiral optics and facilitating high‐ <jats:italic>Q</jats:italic> photonic devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"1 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145897440","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}
Weinan Dong, Le Hong, Yingguo Yang, Chunru Fan, Chuantao Zheng, Feng Jiang, Shengrong He, Fujun Zhang, Min Lu, Yu Zhang, Zhennan Wu, Xue Bai
The core‐skeleton braced low‐frequency acoustic responses, linked to mechanical vibrations, are vital for the reactivity and functionality of a few‐nanometer metal nanoclusters (NCs). Yet, how core‐structure‐dependent acoustic vibrations impact and enhance the luminescence of metal NCs is not fully understood. Using a programmable total‐structure approach, we studied a series of Au 25 NCs, focusing on core symmetry manipulation by altering the shape, stacking patterns, and composition of the icosahedral Au 13 core to disrupt its spherical distribution. Our results show that breaking core symmetry softens electron‐acoustic phonon coupling, thereby enhancing luminescence in NCs. As the Au 13 core deviates from a spherical shape, the frequency and intensity of the radial breathing acoustic mode decrease, and in sequential lower‐frequency quadrupolar and torsional acoustic modes play a reduced role in non‐radiative relaxation. Of note, the core symmetry breaking also redistributes optical phonons, shifting the balance toward non‐radiative dominance. We emphasize that vibrational quenching of electrons in the luminescent state significantly limits NC emission, although electron loss and transfer at higher energies also remain important. These findings offer novel strategies for enhancing luminescence through structural regulation and inspire further exploration of total‐structure suppression and engineering to optimize NC optical performance.
{"title":"Softening of Electron‐Acoustic Phonon Coupling via Core Symmetry Breaking in Metal Nanoclusters","authors":"Weinan Dong, Le Hong, Yingguo Yang, Chunru Fan, Chuantao Zheng, Feng Jiang, Shengrong He, Fujun Zhang, Min Lu, Yu Zhang, Zhennan Wu, Xue Bai","doi":"10.1002/lpor.202502646","DOIUrl":"https://doi.org/10.1002/lpor.202502646","url":null,"abstract":"The core‐skeleton braced low‐frequency acoustic responses, linked to mechanical vibrations, are vital for the reactivity and functionality of a few‐nanometer metal nanoclusters (NCs). Yet, how core‐structure‐dependent acoustic vibrations impact and enhance the luminescence of metal NCs is not fully understood. Using a programmable total‐structure approach, we studied a series of Au <jats:sub>25</jats:sub> NCs, focusing on core symmetry manipulation by altering the shape, stacking patterns, and composition of the icosahedral Au <jats:sub>13</jats:sub> core to disrupt its spherical distribution. Our results show that breaking core symmetry softens electron‐acoustic phonon coupling, thereby enhancing luminescence in NCs. As the Au <jats:sub>13</jats:sub> core deviates from a spherical shape, the frequency and intensity of the radial breathing acoustic mode decrease, and in sequential lower‐frequency quadrupolar and torsional acoustic modes play a reduced role in non‐radiative relaxation. Of note, the core symmetry breaking also redistributes optical phonons, shifting the balance toward non‐radiative dominance. We emphasize that vibrational quenching of electrons in the luminescent state significantly limits NC emission, although electron loss and transfer at higher energies also remain important. These findings offer novel strategies for enhancing luminescence through structural regulation and inspire further exploration of total‐structure suppression and engineering to optimize NC optical performance.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"26 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145897441","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}
Long Chen, Xin Yu Li, Jian Lin Su, Ze Gu, Yu Ming Ning, Zhi Cai Yu, Qiang Xiao, Zi Xuan Cai, Qian Ma, Yijie Shen, Jian Wei You, Tie Jun Cui
Plasmonic skyrmions, electromagnetic counterparts of topological quasiparticles, have recently shown nontrivial subwavelength features and promised topology‐enhanced information applications. However, these were only studied in linear wave systems until now, fundamentally distinct from the topological quasiparticles supported by strong nonlinearity in condensed matter. Here, we theoretically investigate and experimentally demonstrate the behavior of time‐dimensionally synthesized harmonic time‐varying skyrmions, revealing how temporal variations can effectively mimic the characteristics of nonlinear media to achieve frequency conversion. We examine the harmonic responses under typical time‐driven protocols and find that the frequency intervals of different skyrmion modes correspond to the time‐switching frequencies. Through experimental validation on our time‐varying platform, we successfully observe the emergence of harmonic skyrmions synthesized through the temporal dimension, with theoretical predictions corroborated by experimental results. Our findings pave the way for exploring harmonic skyrmions and provide new opportunities for interdisciplinary advancements at the intersection of topological physics and time‐varying systems.
{"title":"Harmonic Plasmonic Skyrmions with Time‐Varying Manipulation","authors":"Long Chen, Xin Yu Li, Jian Lin Su, Ze Gu, Yu Ming Ning, Zhi Cai Yu, Qiang Xiao, Zi Xuan Cai, Qian Ma, Yijie Shen, Jian Wei You, Tie Jun Cui","doi":"10.1002/lpor.202501785","DOIUrl":"https://doi.org/10.1002/lpor.202501785","url":null,"abstract":"Plasmonic skyrmions, electromagnetic counterparts of topological quasiparticles, have recently shown nontrivial subwavelength features and promised topology‐enhanced information applications. However, these were only studied in linear wave systems until now, fundamentally distinct from the topological quasiparticles supported by strong nonlinearity in condensed matter. Here, we theoretically investigate and experimentally demonstrate the behavior of time‐dimensionally synthesized harmonic time‐varying skyrmions, revealing how temporal variations can effectively mimic the characteristics of nonlinear media to achieve frequency conversion. We examine the harmonic responses under typical time‐driven protocols and find that the frequency intervals of different skyrmion modes correspond to the time‐switching frequencies. Through experimental validation on our time‐varying platform, we successfully observe the emergence of harmonic skyrmions synthesized through the temporal dimension, with theoretical predictions corroborated by experimental results. Our findings pave the way for exploring harmonic skyrmions and provide new opportunities for interdisciplinary advancements at the intersection of topological physics and time‐varying systems.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"42 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894261","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 Li, Yang Sun, Jiayang Wu, Chawaphon Prayoonyong, Caitlin E. Murray, Guanghui Ren, Thach G. Nguyen, Xingyuan Xu, Bill Corcoran, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss
Microwave photonic (MWP) filters are essential components in microwave systems due to their wide bandwidth, low loss, and immunity to electromagnetic interference. Steep roll‐off is critical for precise spectral shaping and effective interference suppression, yet conventional MWP filters face challenges in simultaneously achieving steep transitions and high reconfigurability. Here, reconfigurable MWP filters with steep roll‐off based on a transversal filter structure using an optical microcomb source are demonstrated. Four different types of single‐band MWP filters with ultrahigh roll‐off rates up to ∼32.6 dB/GHz and a minimum 20‐dB shape factor of ∼1.15 are achieved. In addition, simply through programming tap coefficients, band‐pass filters with tunable centre frequencies ranging from 5 to 15 GHz and dual‐band MWP filters with various filter responses are demonstrated without changing any hardware, where steep roll‐off is also validated. The reconfigurable MWP filters with steep roll‐off offer a stable and versatile solution for applications requiring high spectral selectivity, such as next‐generation wireless networks, high‐resolution radar imaging, and advanced biomedical sensing.
{"title":"Reconfigurable Microwave Photonic Filters with Ultrasteep Roll‐Off Based on Optical Microcombs","authors":"Yang Li, Yang Sun, Jiayang Wu, Chawaphon Prayoonyong, Caitlin E. Murray, Guanghui Ren, Thach G. Nguyen, Xingyuan Xu, Bill Corcoran, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss","doi":"10.1002/lpor.202501910","DOIUrl":"https://doi.org/10.1002/lpor.202501910","url":null,"abstract":"Microwave photonic (MWP) filters are essential components in microwave systems due to their wide bandwidth, low loss, and immunity to electromagnetic interference. Steep roll‐off is critical for precise spectral shaping and effective interference suppression, yet conventional MWP filters face challenges in simultaneously achieving steep transitions and high reconfigurability. Here, reconfigurable MWP filters with steep roll‐off based on a transversal filter structure using an optical microcomb source are demonstrated. Four different types of single‐band MWP filters with ultrahigh roll‐off rates up to ∼32.6 dB/GHz and a minimum 20‐dB shape factor of ∼1.15 are achieved. In addition, simply through programming tap coefficients, band‐pass filters with tunable centre frequencies ranging from 5 to 15 GHz and dual‐band MWP filters with various filter responses are demonstrated without changing any hardware, where steep roll‐off is also validated. The reconfigurable MWP filters with steep roll‐off offer a stable and versatile solution for applications requiring high spectral selectivity, such as next‐generation wireless networks, high‐resolution radar imaging, and advanced biomedical sensing.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"1 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894308","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}
Jingxian Zhang, Jie Yang, Xinmin Fu, Wei Cui, Yajuan Han, Fangyuan Qi, Huiting Sun, Fan Wu, Weisheng Zhang, Hengyang Luo, Jiechu Liu, Jiafu Wang
Optical bimerons are 3D topological defects embedded within electromagnetic (EM) fields, which originate from pairing of two merons with opposite polarities and vortices, and are homeomorphic to optical skyrmions. They constitute a new family of structured light with nontrivial real‐space topology and exhibit great potential for higher‐capacity communication and even quantum information processing compared to skyrmions. However, most of current methods for generating bimerons generally are limited into optical regime and often require bulky optical paths, restricting their applications at lower frequencies like microwave or terahertz regimes. Here we propose a general method to generate bimerons at microwaves via a single metasurface that can module left‐ and right‐handed circular polarization independently—further reporting the first experimental realization of optical bimerons at lower frequencies. Furthermore, we theoretically and experimentally investigate how to control longitudinal topological texture of bimerons by encoding the Gouy phase and wavefront curvature phase into metasurfaces, demonstrating a new degree of freedom to (en)code information by the bimeronic beams. Our work paves the way for future applications of bimeronic beams at lower frequencies like topologically enhanced information encoding and microwave communication, to name a few.
{"title":"Generating Microwave Bimerons with Propagation‐Variable Topologies by Single Metasurface","authors":"Jingxian Zhang, Jie Yang, Xinmin Fu, Wei Cui, Yajuan Han, Fangyuan Qi, Huiting Sun, Fan Wu, Weisheng Zhang, Hengyang Luo, Jiechu Liu, Jiafu Wang","doi":"10.1002/lpor.202502808","DOIUrl":"https://doi.org/10.1002/lpor.202502808","url":null,"abstract":"Optical bimerons are 3D topological defects embedded within electromagnetic (EM) fields, which originate from pairing of two merons with opposite polarities and vortices, and are homeomorphic to optical skyrmions. They constitute a new family of structured light with nontrivial real‐space topology and exhibit great potential for higher‐capacity communication and even quantum information processing compared to skyrmions. However, most of current methods for generating bimerons generally are limited into optical regime and often require bulky optical paths, restricting their applications at lower frequencies like microwave or terahertz regimes. Here we propose a general method to generate bimerons at microwaves via a single metasurface that can module left‐ and right‐handed circular polarization independently—further reporting the first experimental realization of optical bimerons at lower frequencies. Furthermore, we theoretically and experimentally investigate how to control longitudinal topological texture of bimerons by encoding the Gouy phase and wavefront curvature phase into metasurfaces, demonstrating a new degree of freedom to (en)code information by the bimeronic beams. Our work paves the way for future applications of bimeronic beams at lower frequencies like topologically enhanced information encoding and microwave communication, to name a few.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"1 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894029","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}
Motion perception is increasingly crucial in diverse artificial intelligence scenarios, but it is largely limited by the dual operation mode (light set and electrical reset) and the physical separation architecture. We propose an all‐in‐one optoelectronic memory that can provide positive and negative photoresponse to in situ execute image preprocessing, enabling the high efficiency frame difference for multiple moving object perception. This positive and negative photoresponse heavily relies on the light intensity that can alter structure phase of the fibroin protein. The developed optoelectronic memory exhibits short‐ and long‐term synaptic plasticity under both positive and negative photoresponse, faithfully emulating human retina system to detect multiple motions in complex environment. Perception of the multi‐object motion in real world is demonstrated, showing an accuracy of 95% and over 30 fps real‐time processing speed. The all‐in‐one memory‐enabled artificial retina system lays a significant in‐sensor computing architecture for edge dynamic vision perception.
{"title":"Multi‐Object Motion Real‐Time Perception Enabled by All‐in‐One Optoelectronic Memory","authors":"Xuesen Xie, Shukai Duan, Yifei Yang, Yuexiao Wang, Jinchengyan Wang, Dengshun Gu, Xiaofang Hu, Lidan Wang, Ping Li, Bo Wu, Bai Sun, Guangdong Zhou","doi":"10.1002/lpor.202502501","DOIUrl":"https://doi.org/10.1002/lpor.202502501","url":null,"abstract":"Motion perception is increasingly crucial in diverse artificial intelligence scenarios, but it is largely limited by the dual operation mode (light set and electrical reset) and the physical separation architecture. We propose an all‐in‐one optoelectronic memory that can provide positive and negative photoresponse to in situ execute image preprocessing, enabling the high efficiency frame difference for multiple moving object perception. This positive and negative photoresponse heavily relies on the light intensity that can alter structure phase of the fibroin protein. The developed optoelectronic memory exhibits short‐ and long‐term synaptic plasticity under both positive and negative photoresponse, faithfully emulating human retina system to detect multiple motions in complex environment. Perception of the multi‐object motion in real world is demonstrated, showing an accuracy of 95% and over 30 fps real‐time processing speed. The all‐in‐one memory‐enabled artificial retina system lays a significant in‐sensor computing architecture for edge dynamic vision perception.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"53 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894309","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}
Super‐resolution imaging has attracted much attention in various fields due to its capability to reveal fine structures beyond the diffraction limit. In this paper, super‐resolution ghost imaging (GI) through complex scattering media is reported using neural networks with a physical model and the priors of a diffusion model. Dual deep image priors (DIPs) incorporated with a GI formation model are adopted to overcome the challenge posed by complex scattering media. With the designed dual DIPs, effective object information can be retrieved using the realizations and speckle patterns without any datasets or labels. A super‐resolution model, fine‐tuned from a large pre‐trained stable diffusion model, is further designed to recover a high‐resolution object image beyond the diffraction limit. Experimental results demonstrate that the developed GI can be applied to address complex scattering in dynamic media and achieve a ∼2.4‐fold resolution enhancement beyond the diffraction limit. It is also illustrated that the proposed method pushes the boundaries of optical imaging in complex scenarios.
{"title":"Super‐Resolution Ghost Imaging Through Complex Scattering in Dynamic Media","authors":"Yang Peng, Tianshun Zhang, Wen Chen","doi":"10.1002/lpor.202502103","DOIUrl":"https://doi.org/10.1002/lpor.202502103","url":null,"abstract":"Super‐resolution imaging has attracted much attention in various fields due to its capability to reveal fine structures beyond the diffraction limit. In this paper, super‐resolution ghost imaging (GI) through complex scattering media is reported using neural networks with a physical model and the <jats:italic>priors</jats:italic> of a diffusion model. Dual deep image <jats:italic>priors</jats:italic> (DIPs) incorporated with a GI formation model are adopted to overcome the challenge posed by complex scattering media. With the designed dual DIPs, effective object information can be retrieved using the realizations and speckle patterns without any datasets or labels. A super‐resolution model, fine‐tuned from a large pre‐trained stable diffusion model, is further designed to recover a high‐resolution object image beyond the diffraction limit. Experimental results demonstrate that the developed GI can be applied to address complex scattering in dynamic media and achieve a ∼2.4‐fold resolution enhancement beyond the diffraction limit. It is also illustrated that the proposed method pushes the boundaries of optical imaging in complex scenarios.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"47 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145894048","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}
Terahertz (THz) waves hold great promise for next‐generation wireless communication, radar imaging, and biomedical diagnostics. However, conventional metasurface‐based THz modulators are typically static and single‐functional, limiting their adaptability to diverse operational scenarios. Here, we present a modular design strategy based on spin‐decoupled metasurfaces to achieve switchable and multifunctional THz wave manipulation. This approach integrates spin‐selective phase control with mechanically reconfigurable module layouts—either planar arrangement or directional cascading—to flexibly switch and combine multiple functionalities without the need for active materials or complex redesign procedures. As a proof of concept, two identical metasurface modules are fabricated using low‐cost, high‐throughput 3D printing and experimentally validated to demonstrate versatile beam control, including dual‐focus and nondiffracting beam generation, power‐tunable dual‐focus scanning, and near‐field focal scanning to far‐field beam steering. Functional switching is readily achieved by either adjusting the incident spin state or reconfiguring the module arrangement. Moreover, the modular strategy is inherently scalable to higher frequencies or more modules, enabling further expansion of functionality and tunability. This work establishes a general, fabrication‐friendly platform for compact, multifunctional THz photonic systems, offering broad prospects for 6G communication, intelligent sensing, and integrated THz architectures.
{"title":"Modular Spin‐Decoupled Metasurfaces for Switchable and Multifunctional Terahertz Wave Modulation","authors":"Hao Hu, Zhuo Sun, Xiaoxue Hu, Xiaolei Wang","doi":"10.1002/lpor.202502604","DOIUrl":"https://doi.org/10.1002/lpor.202502604","url":null,"abstract":"Terahertz (THz) waves hold great promise for next‐generation wireless communication, radar imaging, and biomedical diagnostics. However, conventional metasurface‐based THz modulators are typically static and single‐functional, limiting their adaptability to diverse operational scenarios. Here, we present a modular design strategy based on spin‐decoupled metasurfaces to achieve switchable and multifunctional THz wave manipulation. This approach integrates spin‐selective phase control with mechanically reconfigurable module layouts—either planar arrangement or directional cascading—to flexibly switch and combine multiple functionalities without the need for active materials or complex redesign procedures. As a proof of concept, two identical metasurface modules are fabricated using low‐cost, high‐throughput 3D printing and experimentally validated to demonstrate versatile beam control, including dual‐focus and nondiffracting beam generation, power‐tunable dual‐focus scanning, and near‐field focal scanning to far‐field beam steering. Functional switching is readily achieved by either adjusting the incident spin state or reconfiguring the module arrangement. Moreover, the modular strategy is inherently scalable to higher frequencies or more modules, enabling further expansion of functionality and tunability. This work establishes a general, fabrication‐friendly platform for compact, multifunctional THz photonic systems, offering broad prospects for 6G communication, intelligent sensing, and integrated THz architectures.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"5 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145847298","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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