Structured light profilometry has remained constrained by a fundamental bottleneck: the single projection channel. Here, a four‐channel structured light architecture that redefines this limit by harnessing polarization as an additional degree of freedom is introduced. This system combines a digital light processing projector (DLP) with a micro‐polarizer array to achieve pixel‐level superposition of four linear polarization states (0°, 45°, 90°, 135°), boosting transmission capacity by 400% at the hardware level. Beyond hardware, a polarization‐constrained signal separation model that resolves severe non‐orthogonal crosstalk is devised, enabling instantaneous single‐frame channel decoupling with O(1) complexity—an unprecedented capability in polarization multiplexing. This co‐designed hardware‐algorithm framework compresses the projection sequence to 25% of conventional methods and supports sub‐millisecond 3D reconstruction under dynamic and high‐glare conditions, a feat unattainable with existing techniques. This approach transforms structured light into a multi‐dimensional information carrier, laying a technological foundation for ultra‐fast, interference‐resilient 3D sensing in industrial automation, biomedical imaging, and autonomous systems.
{"title":"Breaking through Single‐Channel Limitations: Four‐Channel Structured Light Parallel Projection Technology Based on Polarization Multiplexing","authors":"Xiaokai Xu, Yunzhi Wang, Zhenmin Zhu","doi":"10.1002/lpor.202502703","DOIUrl":"https://doi.org/10.1002/lpor.202502703","url":null,"abstract":"Structured light profilometry has remained constrained by a fundamental bottleneck: the single projection channel. Here, a four‐channel structured light architecture that redefines this limit by harnessing polarization as an additional degree of freedom is introduced. This system combines a digital light processing projector (DLP) with a micro‐polarizer array to achieve pixel‐level superposition of four linear polarization states (0°, 45°, 90°, 135°), boosting transmission capacity by 400% at the hardware level. Beyond hardware, a polarization‐constrained signal separation model that resolves severe non‐orthogonal crosstalk is devised, enabling instantaneous single‐frame channel decoupling with O(1) complexity—an unprecedented capability in polarization multiplexing. This co‐designed hardware‐algorithm framework compresses the projection sequence to 25% of conventional methods and supports sub‐millisecond 3D reconstruction under dynamic and high‐glare conditions, a feat unattainable with existing techniques. This approach transforms structured light into a multi‐dimensional information carrier, laying a technological foundation for ultra‐fast, interference‐resilient 3D sensing in industrial automation, biomedical imaging, and autonomous systems.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"2 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145955105","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}
Integrated Sensing and Communication (ISAC) systems harmoniously combine environmental detection and data transmission within a unified platform, enabling transformative applications in autonomous driving, smart manufacturing, and telemedicine. However, current implementations typically rely on mechanical beam steering and discrete bulky components to fulfill desired functions, limiting steering speed, reliability, and system scalability. Here, we demonstrate an ISAC system based on an integrated photonic‐assisted phased array for the first time. Operating as a transmitter, the array achieves rapid beam steering (23 ) over a wide range through on‐chip time‐delay manipulation. Moreover, the array directly converts optical signals into broadband (27 GHz) millimeter‐wave signals, eliminating the need for external radio‐frequency components. By employing an orthogonal frequency division multiplexing‐frequency modulated continuous‐wave (OFDM‐FMCW) hybrid signal as an integrated waveform, the proposed ISAC system supports the dual functions of sensing and communication without compromising performances in either domain, achieving efficient multiplexing of time and spectrum resources. As a proof‐of‐concept experiment, high‐speed communication (20 Gbps) and high‐precision (3 cm) ranging across different steering angles are successfully demonstrated within a shared spectrum and hardware platform. The proposed scheme shows significant advantages in steering speed, operating bandwidth, and reliability, delivering a potential solution for next‐generation ISAC networks.
{"title":"Millimeter‐Wave Integrated Sensing and Communication System Based on a Photonics‐Assisted Phased Array","authors":"Xiangyu Guo, Zhengran Li, Zhizhou Zhou, Lei Deng, Yu Yu, Xinliang Zhang","doi":"10.1002/lpor.202502350","DOIUrl":"https://doi.org/10.1002/lpor.202502350","url":null,"abstract":"Integrated Sensing and Communication (ISAC) systems harmoniously combine environmental detection and data transmission within a unified platform, enabling transformative applications in autonomous driving, smart manufacturing, and telemedicine. However, current implementations typically rely on mechanical beam steering and discrete bulky components to fulfill desired functions, limiting steering speed, reliability, and system scalability. Here, we demonstrate an ISAC system based on an integrated photonic‐assisted phased array for the first time. Operating as a transmitter, the array achieves rapid beam steering (23 ) over a wide range through on‐chip time‐delay manipulation. Moreover, the array directly converts optical signals into broadband (27 GHz) millimeter‐wave signals, eliminating the need for external radio‐frequency components. By employing an orthogonal frequency division multiplexing‐frequency modulated continuous‐wave (OFDM‐FMCW) hybrid signal as an integrated waveform, the proposed ISAC system supports the dual functions of sensing and communication without compromising performances in either domain, achieving efficient multiplexing of time and spectrum resources. As a proof‐of‐concept experiment, high‐speed communication (20 Gbps) and high‐precision (3 cm) ranging across different steering angles are successfully demonstrated within a shared spectrum and hardware platform. The proposed scheme shows significant advantages in steering speed, operating bandwidth, and reliability, delivering a potential solution for next‐generation ISAC networks.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"264 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145947262","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}
Yu Zhang, Xiangfeng Chen, Lukas Van Iseghem, Iman Zand, Hasan Salmanian, Antonio Ribeiro, Wim Bogaerts
A programmable photonic circuit is demonstrated based on a 7‐cell hexagonal waveguide mesh of Mach–Zehnder interferometer gates. Benefiting from undercut heaters, the optical gates have a small insertion loss of 0.28 dB/gate and a short optical delay of 5.5 ps, which results in a compact circuit with a large free spectral range (FSR) of 31 GHz for a 6‐gate ring resonator. We demonstrate the advantages of this circuit through the applications of beam splitters, wavelength multiplexers, and wavelength filters. To enable a larger FSR, Vernier rings and a dual‐injected ring configuration can be constructed, showing an improved FSR of 93 GHz.
{"title":"General‐Purpose Hexagonal Programmable Photonic Integrated Circuit with a >30 GHz Free Spectral Range","authors":"Yu Zhang, Xiangfeng Chen, Lukas Van Iseghem, Iman Zand, Hasan Salmanian, Antonio Ribeiro, Wim Bogaerts","doi":"10.1002/lpor.202502270","DOIUrl":"https://doi.org/10.1002/lpor.202502270","url":null,"abstract":"A programmable photonic circuit is demonstrated based on a 7‐cell hexagonal waveguide mesh of Mach–Zehnder interferometer gates. Benefiting from undercut heaters, the optical gates have a small insertion loss of 0.28 dB/gate and a short optical delay of 5.5 ps, which results in a compact circuit with a large free spectral range (FSR) of 31 GHz for a 6‐gate ring resonator. We demonstrate the advantages of this circuit through the applications of beam splitters, wavelength multiplexers, and wavelength filters. To enable a larger FSR, Vernier rings and a dual‐injected ring configuration can be constructed, showing an improved FSR of 93 GHz.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"28 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145937955","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}
Near‐infrared‐emitting copper‐based I‐III‐VI quantum dots (QDs) hold significant promise for photonics and bioapplications, yet their broad photoluminescence (PL) emission severely limits color purity and device efficiency. Herein, we report a hierarchically staged synthesis that decouples and sequentially suppresses defect‐ and phonon‐induced broadening. Starting with Zn‐poor CuInSe 2 QDs via cation exchange, we introduce Zn 2+ alloying to passivate cation vacancies and homogenize composition, forming a defect‐minimized core. Subsequent epitaxial overcoating with a thick ZnS shell strongly localizes excitons, evidenced by suppressed thermal quenching and dominant coupling to a higher‐order longitudinal optical ( LO ) phonon mode of ZnS ( E LO ≈ 141 meV). This shifts recombination from defect‐assisted to near‐band‐edge emission, yielding CuInZnSe/ZnS QDs with an ultranarrow linewidth of 111 meV, high PL quantum yield of 73%, and minimal Stokes shift of 42 meV at 977 nm. When integrated into luminescent solar concentrators, these QDs enable an optical efficiency of 8.81% and a power conversion efficiency of 2.79%, underscoring their practical utility. Beyond reporting materials, this work provides profound insights into the interplay of exciton confinement and defect engineering, establishing a general and instructive strategy for achieving high color purity in multinary QDs.
{"title":"Strain‐Activated Shell Phonon Coupling and Defect Passivation for Ultranarrow and Efficient Near‐Infrared‐Emitting CuInZnSe/ZnS Quantum Dots","authors":"Zhipeng Xu, Haoran Chen, Yue Liu, Xiang Zhou, Dechao Yu, Xiaobin Xie, Chunchao Hou, Bohua Dong, Lixin Cao, Chenghui Xia","doi":"10.1002/lpor.202502897","DOIUrl":"https://doi.org/10.1002/lpor.202502897","url":null,"abstract":"Near‐infrared‐emitting copper‐based I‐III‐VI quantum dots (QDs) hold significant promise for photonics and bioapplications, yet their broad photoluminescence (PL) emission severely limits color purity and device efficiency. Herein, we report a hierarchically staged synthesis that decouples and sequentially suppresses defect‐ and phonon‐induced broadening. Starting with Zn‐poor CuInSe <jats:sub>2</jats:sub> QDs via cation exchange, we introduce Zn <jats:sup>2+</jats:sup> alloying to passivate cation vacancies and homogenize composition, forming a defect‐minimized core. Subsequent epitaxial overcoating with a thick ZnS shell strongly localizes excitons, evidenced by suppressed thermal quenching and dominant coupling to a higher‐order longitudinal optical ( <jats:italic>LO</jats:italic> ) phonon mode of ZnS ( <jats:italic> E <jats:sub>LO</jats:sub> </jats:italic> ≈ 141 meV). This shifts recombination from defect‐assisted to near‐band‐edge emission, yielding CuInZnSe/ZnS QDs with an ultranarrow linewidth of 111 meV, high PL quantum yield of 73%, and minimal Stokes shift of 42 meV at 977 nm. When integrated into luminescent solar concentrators, these QDs enable an optical efficiency of 8.81% and a power conversion efficiency of 2.79%, underscoring their practical utility. Beyond reporting materials, this work provides profound insights into the interplay of exciton confinement and defect engineering, establishing a general and instructive strategy for achieving high color purity in multinary QDs.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"4 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145937953","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}
Majid Goodarzi, Manuel P. Fernandez, Geunweon Lim, Connor Rowe, Xinyi Zhu, José Azaña
Temporal cloaking has emerged as a powerful tool for hiding events in time by creating and subsequently closing temporal gaps in a probe signal. This work introduces a novel application of this concept to noise filtering of optical signals. The unique capabilities of this approach are showcased through application to a particularly challenging problem, the denoising of narrowband (MHz‐bandwidth) optical signals, overcoming crucial limitations of current optical bandpass filters and other denoising solutions. A Talbot‐based temporal cloaking system applies temporal phase modulation and group‐velocity dispersion to concentrate the coherent signal into periodic high‐intensity pulses while leaving broadband noise temporally diffuse. A selective temporal filter then transmits the signal‐bearing pulses and blocks the noise‐dominated intervals. The noise‐mitigated signal is restored by reversing the cloaking transformations, enabling effective noise suppression without loss of signal information. This approach offers electronically programmable filter bandwidths through reconfigurable Talbot phase and temporal filter profiles, and achieves optical‐domain noise filtering while preserving compatibility with downstream optical processing. The system can be specifically adapted for efficient denoising of narrowband optical signals. Remarkably, about 8 dB of additional signal‐to‐noise‐ratio improvement is achieved for residual narrowband noise after conventional optical bandpass filtering, across various MHz‐bandwidth temporal waveforms buried in noise.
{"title":"Highly Versatile Real‐Time Optical Noise Filtering Through Temporal Cloaking","authors":"Majid Goodarzi, Manuel P. Fernandez, Geunweon Lim, Connor Rowe, Xinyi Zhu, José Azaña","doi":"10.1002/lpor.202501870","DOIUrl":"https://doi.org/10.1002/lpor.202501870","url":null,"abstract":"Temporal cloaking has emerged as a powerful tool for hiding events in time by creating and subsequently closing temporal gaps in a probe signal. This work introduces a novel application of this concept to noise filtering of optical signals. The unique capabilities of this approach are showcased through application to a particularly challenging problem, the denoising of narrowband (MHz‐bandwidth) optical signals, overcoming crucial limitations of current optical bandpass filters and other denoising solutions. A Talbot‐based temporal cloaking system applies temporal phase modulation and group‐velocity dispersion to concentrate the coherent signal into periodic high‐intensity pulses while leaving broadband noise temporally diffuse. A selective temporal filter then transmits the signal‐bearing pulses and blocks the noise‐dominated intervals. The noise‐mitigated signal is restored by reversing the cloaking transformations, enabling effective noise suppression without loss of signal information. This approach offers electronically programmable filter bandwidths through reconfigurable Talbot phase and temporal filter profiles, and achieves optical‐domain noise filtering while preserving compatibility with downstream optical processing. The system can be specifically adapted for efficient denoising of narrowband optical signals. Remarkably, about 8 dB of additional signal‐to‐noise‐ratio improvement is achieved for residual narrowband noise after conventional optical bandpass filtering, across various MHz‐bandwidth temporal waveforms buried in noise.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"84 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145937956","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}
Chao Li, Qichao Meng, Lei Wang, Hongyuan Zhao, Yunfei Bai, Ziying Wen, Li Huang, William W. Yu, Haibin Chen, Feng Liu
Rare earth‐based luminescent materials are renowned for their unique optical properties, including sharp emission spectra, long‐lived excited states, and high quantum efficiency, making them highly desirable for light‐emitting applications. However, these materials typically exhibit characteristic emissions from rare earth elements, making it uncommon for them to produce blue emissions in the 400–500 nm range. Here, we report ytterbium (Yb 3+ )‐ and erbium (Er 3+ )‐based organic–inorganic amorphous metal halides, BDPA‐M‐Cl and DMP‐M‐Cl (BDPA = benzyldimethylphenylammonium, DMP = 2,6‐dimethylpiperazine, M = Yb, Er), which demonstrate unusual blue emission with a decent photoluminescence quantum yield (PLQY) of ≈63%. We attribute the unique blue emission to efficient exciton radiative recombination from Yb 3+ /Er 3+ to Cl − , which suppresses characteristic emissions of these rare earth ions. Moreover, when these materials are dissolved in N,N‐dimethylformamide or dimethyl sulfoxide, the resulting solution still exhibits bright blue emission with an even higher PLQY of ≈96%. Electrically driven LEDs fabricated with BDPA‐Yb‐Cl thin films demonstrate efficient blue emission, with an external quantum efficiency of 0.29%, comparable to that of state‐of‐the‐art, Pb‐free perovskite blue LEDs. Our study represents a significant departure from traditional rare earth emission mechanisms, broadening the scope of rare earth luminescence and laying a foundation for their use in emerging applications.
{"title":"Highly Luminescent Rare Earth Metal Halide Solutions Used as Inks for Blue Light‐Emitting Diodes","authors":"Chao Li, Qichao Meng, Lei Wang, Hongyuan Zhao, Yunfei Bai, Ziying Wen, Li Huang, William W. Yu, Haibin Chen, Feng Liu","doi":"10.1002/lpor.202502202","DOIUrl":"https://doi.org/10.1002/lpor.202502202","url":null,"abstract":"Rare earth‐based luminescent materials are renowned for their unique optical properties, including sharp emission spectra, long‐lived excited states, and high quantum efficiency, making them highly desirable for light‐emitting applications. However, these materials typically exhibit characteristic emissions from rare earth elements, making it uncommon for them to produce blue emissions in the 400–500 nm range. Here, we report ytterbium (Yb <jats:sup>3+</jats:sup> )‐ and erbium (Er <jats:sup>3+</jats:sup> )‐based organic–inorganic amorphous metal halides, BDPA‐M‐Cl and DMP‐M‐Cl (BDPA = benzyldimethylphenylammonium, DMP = 2,6‐dimethylpiperazine, M = Yb, Er), which demonstrate unusual blue emission with a decent photoluminescence quantum yield (PLQY) of ≈63%. We attribute the unique blue emission to efficient exciton radiative recombination from Yb <jats:sup>3+</jats:sup> /Er <jats:sup>3+</jats:sup> to Cl <jats:sup>−</jats:sup> , which suppresses characteristic emissions of these rare earth ions. Moreover, when these materials are dissolved in N,N‐dimethylformamide or dimethyl sulfoxide, the resulting solution still exhibits bright blue emission with an even higher PLQY of ≈96%. Electrically driven LEDs fabricated with BDPA‐Yb‐Cl thin films demonstrate efficient blue emission, with an external quantum efficiency of 0.29%, comparable to that of state‐of‐the‐art, Pb‐free perovskite blue LEDs. Our study represents a significant departure from traditional rare earth emission mechanisms, broadening the scope of rare earth luminescence and laying a foundation for their use in emerging applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"252 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145937957","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}
Byung‐Geon Park, Geun Woo Baek, Hansol Seo, Minjun Kim, Donghyo Hahm, Yang‐Hee Kim, Heesun Yang, Wan Ki Bae, Hanchul Cho, Jeonghun Kwak
Patterning of colloidal quantum dots (QDs) is essential for realizing high‐resolution, high‐brightness, full‐color quantum dot light‐emitting diodes (QLEDs) and QD color‐conversion layers for near‐eye microdisplays in augmented and virtual reality systems. However, the reliably producing uniform nanoscale QD patterns and practical full‐color QLEDs remains a significant challenge. Here, we report a multi‐functional electrophoretic deposition (MEPD) strategy that enables selective, sequential, and high‐throughput patterning of nanoscale QD patterns. Using ligand‐engineered, negatively charged QDs, MEPD forms 435 600 sub‐pixels with only 3 V applied for 15 s. The same solution chemistry and low‐voltage conditions enable multi‐color patterns across feature sizes ranging from tens of micrometers down to 500 nm, demonstrating constant process complexity independent of pixel dimensions. Moreover, sequential MEPD of ZnO nanoparticles and QDs produces full‐color QLEDs featuring a pixel‐isolated electron transport layer, lateral currents in the tens of nanoamperes, and enhanced efficiencies. These results establish a scalable and manufacturing‐compatible route toward next‐generation ultra‐high‐resolution display.
{"title":"Multi‐Functional Electrophoretic Deposition for Crosstalk‐Free, Ultra‐High‐Resolution Full‐Color QLEDs","authors":"Byung‐Geon Park, Geun Woo Baek, Hansol Seo, Minjun Kim, Donghyo Hahm, Yang‐Hee Kim, Heesun Yang, Wan Ki Bae, Hanchul Cho, Jeonghun Kwak","doi":"10.1002/lpor.202502567","DOIUrl":"https://doi.org/10.1002/lpor.202502567","url":null,"abstract":"Patterning of colloidal quantum dots (QDs) is essential for realizing high‐resolution, high‐brightness, full‐color quantum dot light‐emitting diodes (QLEDs) and QD color‐conversion layers for near‐eye microdisplays in augmented and virtual reality systems. However, the reliably producing uniform nanoscale QD patterns and practical full‐color QLEDs remains a significant challenge. Here, we report a multi‐functional electrophoretic deposition (MEPD) strategy that enables selective, sequential, and high‐throughput patterning of nanoscale QD patterns. Using ligand‐engineered, negatively charged QDs, MEPD forms 435 600 sub‐pixels with only 3 V applied for 15 s. The same solution chemistry and low‐voltage conditions enable multi‐color patterns across feature sizes ranging from tens of micrometers down to 500 nm, demonstrating constant process complexity independent of pixel dimensions. Moreover, sequential MEPD of ZnO nanoparticles and QDs produces full‐color QLEDs featuring a pixel‐isolated electron transport layer, lateral currents in the tens of nanoamperes, and enhanced efficiencies. These results establish a scalable and manufacturing‐compatible route toward next‐generation ultra‐high‐resolution display.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"17 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145937954","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}
Pixelated metasurfaces, designed using machine learning, offer a powerful route to advanced optical functionalities. However, achieving high-resolution designs is limited by significant computational cost and data requirements. This work presents a novel multi-resolution machine learning framework, coupled with a dedicated optimization algorithm, to overcome these limitations. Our approach leverages complementary information across multiple resolutions to accurately predict electromagnetic responses without the computational burden of high-resolution-only designs. By efficiently transferring knowledge between the low- and the high-resolution data, we significantly enhance design flexibility and reduce reliance on extensive datasets. With the multi-resolution optimization algorithm, the model enables precise control over the amplitude, phase, and polarization of electromagnetic waves, facilitating the efficient design of both reflective and transmissive metasurface devices. We demonstrated the efficacy of this method by designing and experimentally validating broadband polarization converters and polarization-controlled reflective deflectors. These results provide a practical and scalable framework for creating complex, multi-functional meta-devices, unlocking new possibilities for intricate and sophisticated metamaterial design.
{"title":"A Multi-Resolution Machine Learning Paradigm for Pixelated Metasurface Design","authors":"Wei Ding, Zhen-Xu Yao, Minxin Zhao, Yuan-Cheng Shi, Yangchen Hao, Zhaofei Sui, Rui-Xin Wu","doi":"10.1002/lpor.202502024","DOIUrl":"https://doi.org/10.1002/lpor.202502024","url":null,"abstract":"Pixelated metasurfaces, designed using machine learning, offer a powerful route to advanced optical functionalities. However, achieving high-resolution designs is limited by significant computational cost and data requirements. This work presents a novel multi-resolution machine learning framework, coupled with a dedicated optimization algorithm, to overcome these limitations. Our approach leverages complementary information across multiple resolutions to accurately predict electromagnetic responses without the computational burden of high-resolution-only designs. By efficiently transferring knowledge between the low- and the high-resolution data, we significantly enhance design flexibility and reduce reliance on extensive datasets. With the multi-resolution optimization algorithm, the model enables precise control over the amplitude, phase, and polarization of electromagnetic waves, facilitating the efficient design of both reflective and transmissive metasurface devices. We demonstrated the efficacy of this method by designing and experimentally validating broadband polarization converters and polarization-controlled reflective deflectors. These results provide a practical and scalable framework for creating complex, multi-functional meta-devices, unlocking new possibilities for intricate and sophisticated metamaterial design.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"4 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920030","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}
Jingwen Guo, Lin Wei, Shuo Wang, Yaru Wang, Ruixin Li, Shourui Li, Kai Wang, Qian Li
2D Cd-based metal halides combine exceptional air stability with reduced toxicity, rendering them promising alternatives to Pb-based perovskites for optoelectronic applications. Nevertheless, achieving highly efficient and tunable multicolor photoluminescence (PL) in these materials remains a formidable challenge. Herein, BDACdBr4 (BDA = 1,4-butanediamine) exhibits intense, near-full-visible PL through the synergistic application of high-pressure tuning and ionic substitution. Upon compression, pronounced octahedral distortions, intralayer deformation, and interlayer contraction are induced, collectively restricting excited-state relaxation, strengthening electron-phonon coupling, and lowering reorganization energy. These effects substantially promote radiative recombination of self-trapped excitons (STEs) while suppressing nonradiative decay, leading to intense PL emission under pressure. Simultaneously, the widened bandgap, reduced Stokes shift, and reduced degeneracy of STE states contribute to an obvious blueshift in emission, ranging from natural white to blue. Furthermore, partial ionic substitution with Pb2+ and Sb3+ enables pressure-tunable emission spanning from deep-blue to orange-red. This dual approach, combining pressure and doping engineering, provides a versatile strategy for designing efficient, multicolor emissive metal halides, highlighting their potential for next-generation pressure sensors and solid-state lighting technologies.
{"title":"Unlocking Intense and Near-Full-Spectrum Photoluminescence in Cd-Based Metal Halides Via Pressure and Doping Engineering","authors":"Jingwen Guo, Lin Wei, Shuo Wang, Yaru Wang, Ruixin Li, Shourui Li, Kai Wang, Qian Li","doi":"10.1002/lpor.202503074","DOIUrl":"https://doi.org/10.1002/lpor.202503074","url":null,"abstract":"2D Cd-based metal halides combine exceptional air stability with reduced toxicity, rendering them promising alternatives to Pb-based perovskites for optoelectronic applications. Nevertheless, achieving highly efficient and tunable multicolor photoluminescence (PL) in these materials remains a formidable challenge. Herein, BDACdBr<sub>4</sub> (BDA = 1,4-butanediamine) exhibits intense, near-full-visible PL through the synergistic application of high-pressure tuning and ionic substitution. Upon compression, pronounced octahedral distortions, intralayer deformation, and interlayer contraction are induced, collectively restricting excited-state relaxation, strengthening electron-phonon coupling, and lowering reorganization energy. These effects substantially promote radiative recombination of self-trapped excitons (STEs) while suppressing nonradiative decay, leading to intense PL emission under pressure. Simultaneously, the widened bandgap, reduced Stokes shift, and reduced degeneracy of STE states contribute to an obvious blueshift in emission, ranging from natural white to blue. Furthermore, partial ionic substitution with Pb<sup>2+</sup> and Sb<sup>3+</sup> enables pressure-tunable emission spanning from deep-blue to orange-red. This dual approach, combining pressure and doping engineering, provides a versatile strategy for designing efficient, multicolor emissive metal halides, highlighting their potential for next-generation pressure sensors and solid-state lighting technologies.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"45 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920412","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}
With the increasing number of users in local networks, the demand for high-efficiency short-distance data transmission has surged. Plastic optical fiber (POF) communication systems with high speed, bandwidth, and flexibility have been used as ideal technologies for last-mile applications. However, visible-light signal intensity attenuation and data quality degradation in POF transmission have become extremely severe owing to the continuously increasing number of network nodes in a finite space. In this study, polymer visible-light fluorene-doped waveguide amplifiers (FDWAs) are proposed for POF communication systems. Both intermolecular energy-assisted and balanced transfer processes are realized between triarylsulfonium salt photoinitiators and fluorescent small-molecule oligomers, based on the Förster resonance energy transfer mechanism. The FDWAs can be fabricated using a UV direct-writing technique. The gain coefficients of 1.32 dB/mm at 532 nm green light and 0.83 dB/mm at 655 nm red light under 405 nm pumping light are obtained. The proposed technique is suitable for high-density local POF network applications.
{"title":"Polymer Visible-Light Fluorene-Doped Waveguide Amplifiers for Plastic Optical Fiber Communication Systems","authors":"Xiangyi Sun, Xiangzhuo Han, Junfeng Song, Anqi Cui, Huayue Zhao, Zhanchen Cui, Teng Fei, Changming Chen","doi":"10.1002/lpor.202502230","DOIUrl":"https://doi.org/10.1002/lpor.202502230","url":null,"abstract":"With the increasing number of users in local networks, the demand for high-efficiency short-distance data transmission has surged. Plastic optical fiber (POF) communication systems with high speed, bandwidth, and flexibility have been used as ideal technologies for last-mile applications. However, visible-light signal intensity attenuation and data quality degradation in POF transmission have become extremely severe owing to the continuously increasing number of network nodes in a finite space. In this study, polymer visible-light fluorene-doped waveguide amplifiers (FDWAs) are proposed for POF communication systems. Both intermolecular energy-assisted and balanced transfer processes are realized between triarylsulfonium salt photoinitiators and fluorescent small-molecule oligomers, based on the Förster resonance energy transfer mechanism. The FDWAs can be fabricated using a UV direct-writing technique. The gain coefficients of 1.32 dB/mm at 532 nm green light and 0.83 dB/mm at 655 nm red light under 405 nm pumping light are obtained. The proposed technique is suitable for high-density local POF network applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"40 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920411","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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