Bi2O2Se nanoplates, a semiconductor saturable absorber (SA) characterized by strong nonlinear absorption and excellent stability, are typically hindered by scattering losses introduced during defect modulation. In this study, by combining with a non-metallic semiconductor WO3-x, the WO3-x/Bi2O2Se plasmonic heterostructure is developed to sufficiently overcome the aforementioned limitations. The as-developed heterostructure SA is applied for 1040 nm Yb,Y:CaF2-SrF2 mode-locked lasers, realizing ultrashort pulses of ∼364 fs at a significantly reduced absorbed pump threshold of 2.02 W and an average output power of 424 mW. Finite-difference time-domain (FDTD) simulations, transient absorption spectroscopy, and open-aperture Z-scan measurements collectively reveal that hot-carrier transfer mediated by localized surface plasmon resonance significantly promotes Auger recombination in Bi2O2Se, thereby shortening carrier lifetimes. This effect is particularly pronounced at 1050 nm, manifesting as a substantial increase in the nonlinear absorption coefficient from −(507 ± 4) to −(1587 ± 14) cm MW−1. The resultant plasmon-enhanced nonlinear optical response facilitates the realization of ultrafast pulses from a mode-locked laser operating at lower thresholds and narrower pulse widths.
{"title":"Plasmonic Hot-Carrier Transfer in WO3-x–Bi2O2Se Heterostructures for Ultrafast Optical Switching","authors":"Junting Liu, Hongkun Nie, Yankai Cheng, Xinlei Zhang, Jiawen Lv, Lulu Dong, Shande Liu, Junpeng Lu, Zhenhua Ni, Baitao Zhang","doi":"10.1002/lpor.202502525","DOIUrl":"https://doi.org/10.1002/lpor.202502525","url":null,"abstract":"Bi<sub>2</sub>O<sub>2</sub>Se nanoplates, a semiconductor saturable absorber (SA) characterized by strong nonlinear absorption and excellent stability, are typically hindered by scattering losses introduced during defect modulation. In this study, by combining with a non-metallic semiconductor WO<sub>3-x</sub>, the WO<sub>3-x</sub>/Bi<sub>2</sub>O<sub>2</sub>Se plasmonic heterostructure is developed to sufficiently overcome the aforementioned limitations. The as-developed heterostructure SA is applied for 1040 nm Yb,Y:CaF<sub>2</sub>-SrF<sub>2</sub> mode-locked lasers, realizing ultrashort pulses of ∼364 fs at a significantly reduced absorbed pump threshold of 2.02 W and an average output power of 424 mW. Finite-difference time-domain (FDTD) simulations, transient absorption spectroscopy, and open-aperture Z-scan measurements collectively reveal that hot-carrier transfer mediated by localized surface plasmon resonance significantly promotes Auger recombination in Bi<sub>2</sub>O<sub>2</sub>Se, thereby shortening carrier lifetimes. This effect is particularly pronounced at 1050 nm, manifesting as a substantial increase in the nonlinear absorption coefficient from −(507 ± 4) to −(1587 ± 14) cm MW<sup>−1</sup>. The resultant plasmon-enhanced nonlinear optical response facilitates the realization of ultrafast pulses from a mode-locked laser operating at lower thresholds and narrower pulse widths.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"93 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089251","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 trend toward device miniaturization and precision manufacturing poses challenges for microscopic 3D surface imaging under global illumination, due to the strong inter-reflections and subsurface scattering. Conventional structured-light methods often fail in dealing with such conditions because of their inherent point-to-point triangulation rule. Here, we propose a global illumination-resistant microscopic 3D surface imaging technique based on annular spectrum sampling parallel single-pixel imaging (ASS-PSI). By exploiting the point-to-plane imaging ability of single-pixel detection and establishing the global illumination response (GIR) model, the mixed direct and global illumination components can be effectively separated at each camera pixel. Furthermore, an annular spectrum sampling strategy is proposed to mitigate the impact of structured light on illumination interference while enhancing measurement efficiency. With discarding unstable low-frequency illumination, fewer spectrum coefficients yield higher accuracy, turning “less” into “more” under harsh conditions. Experimental results under strong inter-reflection and subsurface scattering conditions demonstrate that ASS-PSI achieves superior robustness compared to the conventional approaches. These advances make ASS-PSI a promising solution for robust microscopic 3D imaging in advanced manufacturing and biomedical applications.
{"title":"Microscopic 3D Surface Imaging With Annular Spectrum Sampling Parallel Single-Pixel Imaging: Resistant to Global Illumination","authors":"Chengmin Liu, Feifei Chen, Biao Li, Zhengdong Chen, Yongfu Wen, Qican Zhang, Zhoujie Wu","doi":"10.1002/lpor.202502609","DOIUrl":"https://doi.org/10.1002/lpor.202502609","url":null,"abstract":"The trend toward device miniaturization and precision manufacturing poses challenges for microscopic 3D surface imaging under global illumination, due to the strong inter-reflections and subsurface scattering. Conventional structured-light methods often fail in dealing with such conditions because of their inherent point-to-point triangulation rule. Here, we propose a global illumination-resistant microscopic 3D surface imaging technique based on annular spectrum sampling parallel single-pixel imaging (ASS-PSI). By exploiting the point-to-plane imaging ability of single-pixel detection and establishing the global illumination response (GIR) model, the mixed direct and global illumination components can be effectively separated at each camera pixel. Furthermore, an annular spectrum sampling strategy is proposed to mitigate the impact of structured light on illumination interference while enhancing measurement efficiency. With discarding unstable low-frequency illumination, fewer spectrum coefficients yield higher accuracy, turning “less” into “more” under harsh conditions. Experimental results under strong inter-reflection and subsurface scattering conditions demonstrate that ASS-PSI achieves superior robustness compared to the conventional approaches. These advances make ASS-PSI a promising solution for robust microscopic 3D imaging in advanced manufacturing and biomedical applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"83 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089252","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}
Chenyang Zhan, Zihao Wang, Sisi Liang, Haomiao Zhu
Developing narrow-band green phosphors via selective site occupancy engineering remains challenging for wide-color-gamut displays. While Eu2+-doped UCr4C4-type nitride and oxynitride lithoaluminates exhibit narrow-band emission and high thermal stability, their emission spectra are confined to red–orange region due to the pronounced nephelauxetic effect of N3− ions. To address this limitation, we design a nitrogen-free oxolithoaluminate phosphor, Sr5/6Li17/6-xAl7/6-xZn2xO4:Eu2+ (SLAZO:Eu2+), synthesized via a stepwise solid-state reaction with Zn2+ doping ensuring phase stabilization. Crucially, elevating the sintering temperature from 780°C to 870°C confined Eu2+ occupancy from dispersed Sr1–Sr5 sites (distorted [SrO8] cubes) to larger Sr2a/b and Sr3a/b sites, thereby transforming emission from dual-band yellow–green to a singular narrow-band green peak at 528 nm. The optimized phosphor exhibits a narrow full-width-at-half-maximum (FWHM) of 51 nm (1784 cm−1) under 400 nm excitation. It has an internal/external quantum yield of 41.6%/20.1% and maintains 54.2% of its emission intensity at 150°C relative to 25°C. A white LED device fabricated with SLAZO:Eu2+, K2TiF6:Mn4+, and a 450 nm blue chip achieves a color gamut covering 97.4% of the National Television System Committee standard. This study demonstrates thermally-driven site-selective occupation as an effective strategy for emission tuning and validates SLAZO:Eu2+ as a promising narrow-band green emitter for next-generation displays.
{"title":"Thermally Driven Eu2+ Site-Selective Occupation Enables Narrow-Band Green Emission in an Oxolithoaluminate Phosphor for Backlight Display Applications","authors":"Chenyang Zhan, Zihao Wang, Sisi Liang, Haomiao Zhu","doi":"10.1002/lpor.202502302","DOIUrl":"https://doi.org/10.1002/lpor.202502302","url":null,"abstract":"Developing narrow-band green phosphors via selective site occupancy engineering remains challenging for wide-color-gamut displays. While Eu<sup>2+</sup>-doped UCr<sub>4</sub>C<sub>4</sub>-type nitride and oxynitride lithoaluminates exhibit narrow-band emission and high thermal stability, their emission spectra are confined to red–orange region due to the pronounced nephelauxetic effect of N<sup>3−</sup> ions. To address this limitation, we design a nitrogen-free oxolithoaluminate phosphor, Sr<sub>5/6</sub>Li<sub>17/6-</sub><i><sub>x</sub></i>Al<sub>7/6-</sub><i><sub>x</sub></i>Zn<sub>2</sub><i><sub>x</sub></i>O<sub>4</sub>:Eu<sup>2+</sup> (SLAZO:Eu<sup>2+</sup>), synthesized via a stepwise solid-state reaction with Zn<sup>2+</sup> doping ensuring phase stabilization. Crucially, elevating the sintering temperature from 780°C to 870°C confined Eu<sup>2+</sup> occupancy from dispersed Sr1–Sr5 sites (distorted [SrO<sub>8</sub>] cubes) to larger Sr2a/b and Sr3a/b sites, thereby transforming emission from dual-band yellow–green to a singular narrow-band green peak at 528 nm. The optimized phosphor exhibits a narrow full-width-at-half-maximum (FWHM) of 51 nm (1784 cm<sup>−1</sup>) under 400 nm excitation. It has an internal/external quantum yield of 41.6%/20.1% and maintains 54.2% of its emission intensity at 150°C relative to 25°C. A white LED device fabricated with SLAZO:Eu<sup>2</sup><sup>+</sup>, K<sub>2</sub>TiF<sub>6</sub>:Mn<sup>4</sup><sup>+</sup>, and a 450 nm blue chip achieves a color gamut covering 97.4% of the National Television System Committee standard. This study demonstrates thermally-driven site-selective occupation as an effective strategy for emission tuning and validates SLAZO:Eu<sup>2+</sup> as a promising narrow-band green emitter for next-generation displays.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"81 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089254","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}
Snapshot light‐field microscopes (SLFMs) enable high‐speed 3D observation (4D imaging) of dynamic micro‐targets. However, their performance is fundamentally restricted by the inherent planar structure of microlens arrays (MLAs), which leads to tradeoffs among resolution, depth of field (DOF), and depth perception, making large DOF light‐field detection extremely challenging. Here, we propose a paradigm in curved MLA with a logarithmic profile, featuring extreme depth of focus (>346λ), enhanced parallax (273%), and near‐diffraction‐limited resolution, outperforming conventional planar counterparts. Integrated into a commercial microscope and combined with neural network‐based reconstruction, this architecture yields a super depth‐of‐field snapshot light‐field microscope (SDOF‐SLFM), achieving over 15 times improvement in DOF (>3 mm) and enabling in situ stereo imaging of micro‐pyramids and 4D tracking of micro‐particles in flow fields. This study offers a practical pathway for upgrading SLFMs without complex system assembly or sample processing, facilitating the adaptation of conventional commercial microscopes to dynamic 4D imaging applications such as biological laboratories and microfluidic flow monitoring.
{"title":"Super Depth‐of‐Field Snapshot Light‐Field Microscopy","authors":"Zhi‐Yong Hu, Chang Qiao, Jian‐Yu Dou, Ming‐Ze Zhao, Zhen‐Nan Tian, Yue‐Ying Zhang, Yan‐Hao Yu, Chong Pan, Yong‐Lai Zhang, Qi‐Dai Chen, Din Ping Tsai, Hong‐Bo Sun","doi":"10.1002/lpor.202502750","DOIUrl":"https://doi.org/10.1002/lpor.202502750","url":null,"abstract":"Snapshot light‐field microscopes (SLFMs) enable high‐speed 3D observation (4D imaging) of dynamic micro‐targets. However, their performance is fundamentally restricted by the inherent planar structure of microlens arrays (MLAs), which leads to tradeoffs among resolution, depth of field (DOF), and depth perception, making large DOF light‐field detection extremely challenging. Here, we propose a paradigm in curved MLA with a logarithmic profile, featuring extreme depth of focus (>346λ), enhanced parallax (273%), and near‐diffraction‐limited resolution, outperforming conventional planar counterparts. Integrated into a commercial microscope and combined with neural network‐based reconstruction, this architecture yields a super depth‐of‐field snapshot light‐field microscope (SDOF‐SLFM), achieving over 15 times improvement in DOF (>3 mm) and enabling in situ stereo imaging of micro‐pyramids and 4D tracking of micro‐particles in flow fields. This study offers a practical pathway for upgrading SLFMs without complex system assembly or sample processing, facilitating the adaptation of conventional commercial microscopes to dynamic 4D imaging applications such as biological laboratories and microfluidic flow monitoring.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"38 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089287","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}
Optical encryption provides an effective way to secure confidential information, featuring low energy consumption, parallel operation, high speed, and the ability to process multidimensional data. However, a unified framework that can encrypt and decrypt optical information across the fundamental spatial physical dimensions (amplitude, phase, and polarization) is still lacking. Here, we present an optical cryptography approach based on topological differentiation via Pancharatnam–Berry (PB) phase liquid crystal optical elements. By leveraging the spin‐dependent phase modulation of the PB phase, binary‐encoded optical images in any physical dimension are encrypted into an identical ciphertext, effectively hiding the information by converting it into edge‐based representations. Decryption is accomplished through a conjugate topological differentiation operation, which precisely reverses the process by redistributing energy from the edge back to the center, thereby restoring the original image. As a proof of concept, we successfully demonstrated the encryption and decryption of the plaintext information “LIGHT” across the spatial dimensions of amplitude, phase, and polarization. This work introduces a new paradigm in optical information security by innovatively applying optical differentiation to physical‐layer encryption and decryption, providing a robust and unified approach for the protection of multidimensional optical data.
{"title":"Optical Topological Differentiation Cryptography","authors":"Yanliang He, Yuanfeng Zhu, Haimei Luo, Wen Yuan, Guiqiang Liu, Zhengqi Liu, Xianping Wang, Junxiao Zhou","doi":"10.1002/lpor.202502957","DOIUrl":"https://doi.org/10.1002/lpor.202502957","url":null,"abstract":"Optical encryption provides an effective way to secure confidential information, featuring low energy consumption, parallel operation, high speed, and the ability to process multidimensional data. However, a unified framework that can encrypt and decrypt optical information across the fundamental spatial physical dimensions (amplitude, phase, and polarization) is still lacking. Here, we present an optical cryptography approach based on topological differentiation via Pancharatnam–Berry (PB) phase liquid crystal optical elements. By leveraging the spin‐dependent phase modulation of the PB phase, binary‐encoded optical images in any physical dimension are encrypted into an identical ciphertext, effectively hiding the information by converting it into edge‐based representations. Decryption is accomplished through a conjugate topological differentiation operation, which precisely reverses the process by redistributing energy from the edge back to the center, thereby restoring the original image. As a proof of concept, we successfully demonstrated the encryption and decryption of the plaintext information “LIGHT” across the spatial dimensions of amplitude, phase, and polarization. This work introduces a new paradigm in optical information security by innovatively applying optical differentiation to physical‐layer encryption and decryption, providing a robust and unified approach for the protection of multidimensional optical data.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"47 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089282","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}
Xinjiang Zhan, Jie Cao, Le Dong, Ye Xun, Ya Chen, Yulong Wang, Bing Chen, Shujuan Liu, Xiuwen Xu, Qiang Zhao
Organic–inorganic hybrid copper halides, with exceptional optoelectronic properties encoded in their highly tunable crystal structure, are emerging as promising candidates for next‐generation scintillators. However, achieving both high light yield and fast luminescence decay in copper halides remains a significant challenge, limiting their application in real‐time X‐ray imaging. Here, a simple yet effective ion exchange approach is developed to enable rapid conversion of (MeEn) 2 Cu 4 Br 6 (MeEn = 3‐methylbut‐2‐enyl(triphenyl)phosphanium) to (MeEn) 2 Cu 4 I 6 , resulting in a near‐unity photoluminescence quantum yield (PLQY), a 1.7‐fold increase in light yield (39700 photons MeV −1 ), and a 15‐fold reduction in luminescence decay time (2.4 µs). Mechanistic investigations reveal that the enhanced scintillation properties arise from reduced lattice distortion, appropriately weakened electron‐phonon coupling, and strong spin–orbit coupling induced by the heavy iodine atom. Beyond (MeEn) 2 Cu 4 X 6 , this approach is applicable to a variety of copper halides, leading to consistent improvements in photophysical performance. Finally, by embedding (MeEn) 2 Cu 4 I 6 with a polymer matrix, the resulting scintillation film is further entailed with desired flexibility and water resistance, demonstrating its capability in static, dynamic, curved, and underwater X‐ray imaging.
有机-无机杂化卤化铜在其高度可调的晶体结构中具有特殊的光电特性，正在成为下一代闪烁体的有希望的候选者。然而，在卤化铜中实现高产光率和快速发光衰减仍然是一个重大挑战，限制了它们在实时X射线成像中的应用。在这里，我们开发了一种简单而有效的离子交换方法，使（MeEn） 2 Cu 4 Br 6 （MeEn = 3‐methylbut‐2‐enyl(triphenyl) phospium）快速转化为（MeEn） 2 Cu 4 I 6，从而产生接近统一的光致发光量子产率（PLQY），光产率增加1.7倍（39700光子MeV−1），发光衰减时间减少15倍（2.4µs）。机制研究表明，增强的闪烁特性是由于减少了晶格畸变，适当减弱了电子-声子耦合，以及由重碘原子引起的强自旋-轨道耦合。除了（MeEn） 2 Cu 4 X 6之外，这种方法适用于各种卤化铜，从而导致光物理性能的持续改进。最后，通过在聚合物基体中嵌入（MeEn） 2 Cu 4 i6，所得到的闪烁膜进一步具有所需的柔韧性和耐水性，展示了其在静态、动态、弯曲和水下X射线成像方面的能力。
{"title":"Dynamic and Underwater X‐ray Imaging Enabled by Instant Ion Exchange of Copper Halide Scintillators","authors":"Xinjiang Zhan, Jie Cao, Le Dong, Ye Xun, Ya Chen, Yulong Wang, Bing Chen, Shujuan Liu, Xiuwen Xu, Qiang Zhao","doi":"10.1002/lpor.202503085","DOIUrl":"https://doi.org/10.1002/lpor.202503085","url":null,"abstract":"Organic–inorganic hybrid copper halides, with exceptional optoelectronic properties encoded in their highly tunable crystal structure, are emerging as promising candidates for next‐generation scintillators. However, achieving both high light yield and fast luminescence decay in copper halides remains a significant challenge, limiting their application in real‐time X‐ray imaging. Here, a simple yet effective ion exchange approach is developed to enable rapid conversion of (MeEn) <jats:sub>2</jats:sub> Cu <jats:sub>4</jats:sub> Br <jats:sub>6</jats:sub> (MeEn = 3‐methylbut‐2‐enyl(triphenyl)phosphanium) to (MeEn) <jats:sub>2</jats:sub> Cu <jats:sub>4</jats:sub> I <jats:sub>6</jats:sub> , resulting in a near‐unity photoluminescence quantum yield (PLQY), a 1.7‐fold increase in light yield (39700 photons MeV <jats:sup>−1</jats:sup> ), and a 15‐fold reduction in luminescence decay time (2.4 µs). Mechanistic investigations reveal that the enhanced scintillation properties arise from reduced lattice distortion, appropriately weakened electron‐phonon coupling, and strong spin–orbit coupling induced by the heavy iodine atom. Beyond (MeEn) <jats:sub>2</jats:sub> Cu <jats:sub>4</jats:sub> X <jats:sub>6</jats:sub> , this approach is applicable to a variety of copper halides, leading to consistent improvements in photophysical performance. Finally, by embedding (MeEn) <jats:sub>2</jats:sub> Cu <jats:sub>4</jats:sub> I <jats:sub>6</jats:sub> with a polymer matrix, the resulting scintillation film is further entailed with desired flexibility and water resistance, demonstrating its capability in static, dynamic, curved, and underwater X‐ray imaging.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"13 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089284","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}
We present a versatile dielectric platform for studying chiral light–matter interaction and cavity quantum electrodynamics, based on high bend transmittance waveguide (HBT WG) modes of triangular‐lattice photonic crystals (Tri‐PhCs). The demonstration of chiral coupling is realized by employing two Tri‐PhC zigzag interface waveguides which offer a simplified geometry in the first place. Compared to previous honeycomb‐lattice systems, Tri‐PhC zigzag waveguides provide at least twice the effective chiral area for quantum dot (QD) interaction and support accessible slow‐light modes that are crucial for light–matter interaction. Integrating self‐assembled QDs, we experimentally demonstrate chiral photon routing in Z‐shaped Tri‐PhC HBT WGs, confirming robust directional photon transport. Additionally, we incorporate a whispering‐gallery‐mode cavity‐waveguide structure to achieve Purcell‐enhanced on‐chip single‐photon emission, with a Purcell factor of 4 and spin‐dependent directional contrast of 82%. Our results show the potential of Tri‐PhC‐based topological waveguides as a promising, scalable platform for low‐loss, high‐chirality quantum photonic devices.
{"title":"Chiral Quantum Optics With Topological Photonic Crystal Waveguide of Triangular Lattice","authors":"Hancong Li, Sai Yan, Zhikai Ma, Rui Zhu, Hanqing Liu, Xiqing Chen, Yu Yuan, Longlong Yang, Haiqiao Ni, Zhichuan Niu, Qihuang Gong, Xiulai Xu","doi":"10.1002/lpor.202501893","DOIUrl":"https://doi.org/10.1002/lpor.202501893","url":null,"abstract":"We present a versatile dielectric platform for studying chiral light–matter interaction and cavity quantum electrodynamics, based on high bend transmittance waveguide (HBT WG) modes of triangular‐lattice photonic crystals (Tri‐PhCs). The demonstration of chiral coupling is realized by employing two Tri‐PhC zigzag interface waveguides which offer a simplified geometry in the first place. Compared to previous honeycomb‐lattice systems, Tri‐PhC zigzag waveguides provide at least twice the effective chiral area for quantum dot (QD) interaction and support accessible slow‐light modes that are crucial for light–matter interaction. Integrating self‐assembled QDs, we experimentally demonstrate chiral photon routing in Z‐shaped Tri‐PhC HBT WGs, confirming robust directional photon transport. Additionally, we incorporate a whispering‐gallery‐mode cavity‐waveguide structure to achieve Purcell‐enhanced on‐chip single‐photon emission, with a Purcell factor of 4 and spin‐dependent directional contrast of 82%. Our results show the potential of Tri‐PhC‐based topological waveguides as a promising, scalable platform for low‐loss, high‐chirality quantum photonic devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"8 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089285","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}
Zhazira Zhumabay, Clément Ferise, Vincent Pagneux, Stefan Rotter, Matthieu Davy
We present a framework for achieving broadband perfect wave transmission in complex systems by optimizing symmetric disordered media via inverse design. We show that leveraging symmetry of complex media reduces the optimization's complexity enabling the incorporation of additional constraints in the parameter space. Starting from a single perfectly transmitting state with predefined input and output wavefronts at a specific frequency, we progressively broaden the bandwidth — from a reflectionless exceptional point with a flattened lineshape to narrowband filters and ultimately to broadband quasi‐perfect transmission exhibiting a rainbow effect. Numerical simulations based on the coupled dipole approximation are validated experimentally in a multichannel microwave waveguide with dielectric and metallic scatterers. Finally, we demonstrate broadband enhanced wave transmission through barriers highlighting the potential for advanced wave control applications.
{"title":"Inverse Design of Mirror‐Symmetric Disordered Systems for Broadband Perfect Transmission","authors":"Zhazira Zhumabay, Clément Ferise, Vincent Pagneux, Stefan Rotter, Matthieu Davy","doi":"10.1002/lpor.202501055","DOIUrl":"https://doi.org/10.1002/lpor.202501055","url":null,"abstract":"We present a framework for achieving broadband perfect wave transmission in complex systems by optimizing symmetric disordered media via inverse design. We show that leveraging symmetry of complex media reduces the optimization's complexity enabling the incorporation of additional constraints in the parameter space. Starting from a single perfectly transmitting state with predefined input and output wavefronts at a specific frequency, we progressively broaden the bandwidth — from a reflectionless exceptional point with a flattened lineshape to narrowband filters and ultimately to broadband quasi‐perfect transmission exhibiting a rainbow effect. Numerical simulations based on the coupled dipole approximation are validated experimentally in a multichannel microwave waveguide with dielectric and metallic scatterers. Finally, we demonstrate broadband enhanced wave transmission through barriers highlighting the potential for advanced wave control applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"282 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089258","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}
Jingchi Li, Hua Zhong, Yixiao Zhu, Yu He, Zhen Wang, Xiong Ni, Xingchen Ji, Qian Hu, Haoshuo Chen, Nicolas K. Fontaine, Roland Ryf, William Shieh, Yikai Su
The exponential growth of global data traffic driven by artificial intelligence and cloud computing necessitates cost‐efficient, ultrahigh‐capacity optical interconnects. Integrated photonic interconnect offers a promising solution but faces critical bottlenecks: integrated coherent receivers require local oscillator (LO) lasers, resulting in material incompatibility and cost challenges for monolithic integration, while integrated self‐coherent schemes fundamentally suffer from nonlinear distortions induced by the nonlinear beating process between signal inputs during optical‐to‐electrical mapping, which limits both capacity and spectral efficiency. Here, we present an integrated LO‐free homodyne detection scheme with superior linearity enabled by a micro‐ring filter. The Si 3 N 4 micro‐ring resonator effectively filters out the optical carrier for homodyne detection, saving the LO in coherent receivers and eliminating the second‐order nonlinear distortions commonly encountered in self‐coherent schemes. Our fabricated monolithically integrated silicon photonic receiver enables single‐polarization 600‐Gb/s 16‐ary quadrature amplitude modulated orthogonal frequency division multiplexing signal transmission over an 80‐km fiber, achieving a net 480‐Gb/s per polarization. This represents an 86% improvement over previous integrated self‐coherent detection records and matches that of state‐of‐the‐art integrated coherent systems. Multichannel validation across the C band further confirms the dense wavelength‐division multiplexing compatibility. This work provides an Optical communication, dense wavelength division multiplexing, direct detection, integrated photonic interconnects, silicon photonicsscalable and cost‐effective solution essential for future 1.6 Tb/s per lane optical interconnects.
{"title":"Monolithically Integrated Silicon Photonic Local Oscillator‐Free Homodyne Receiver","authors":"Jingchi Li, Hua Zhong, Yixiao Zhu, Yu He, Zhen Wang, Xiong Ni, Xingchen Ji, Qian Hu, Haoshuo Chen, Nicolas K. Fontaine, Roland Ryf, William Shieh, Yikai Su","doi":"10.1002/lpor.202502793","DOIUrl":"https://doi.org/10.1002/lpor.202502793","url":null,"abstract":"The exponential growth of global data traffic driven by artificial intelligence and cloud computing necessitates cost‐efficient, ultrahigh‐capacity optical interconnects. Integrated photonic interconnect offers a promising solution but faces critical bottlenecks: integrated coherent receivers require local oscillator (LO) lasers, resulting in material incompatibility and cost challenges for monolithic integration, while integrated self‐coherent schemes fundamentally suffer from nonlinear distortions induced by the nonlinear beating process between signal inputs during optical‐to‐electrical mapping, which limits both capacity and spectral efficiency. Here, we present an integrated LO‐free homodyne detection scheme with superior linearity enabled by a micro‐ring filter. The Si <jats:sub>3</jats:sub> N <jats:sub>4</jats:sub> micro‐ring resonator effectively filters out the optical carrier for homodyne detection, saving the LO in coherent receivers and eliminating the second‐order nonlinear distortions commonly encountered in self‐coherent schemes. Our fabricated monolithically integrated silicon photonic receiver enables single‐polarization 600‐Gb/s 16‐ary quadrature amplitude modulated orthogonal frequency division multiplexing signal transmission over an 80‐km fiber, achieving a net 480‐Gb/s per polarization. This represents an 86% improvement over previous integrated self‐coherent detection records and matches that of state‐of‐the‐art integrated coherent systems. Multichannel validation across the C band further confirms the dense wavelength‐division multiplexing compatibility. This work provides an Optical communication, dense wavelength division multiplexing, direct detection, integrated photonic interconnects, silicon photonicsscalable and cost‐effective solution essential for future 1.6 Tb/s per lane optical interconnects.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"61 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089281","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}
Shijian Yu, Jinxing Guo, Dongfang Guan, Zhen Liu, Yongxiang Liu
Radar electromagnetic phantoms aim to deceive radar systems by introducing virtual targets—entities that do not physically exist—into radar imagery, thereby inducing erroneous recognition. Information metasurfaces, functioning as digitally reconfigurable electromagnetic reflectors, offer unprecedented capabilities in multidimensional radar target signatures control. Nevertheless, existing space‐coding‐based techniques are constrained by static phantom image templates, limiting their ability to generate dynamically reconfigurable radar phantoms. Temporal modulation strategies are susceptible to synchronization errors under non‐cooperative scenarios. To address these challenges, this paper proposes a novel method for generating image‐level, dynamically stable, and reconfigurable radar electromagnetic phantoms via information metasurfaces. The proposed approach leverages the geometric theory of diffraction (GTD) to extract characteristic parameters oftargets. These parameters subsequently guide the design of asynchronous frequency‐modulated sequences implemented on the metasurface. A 1‐bit information metasurface prototype was developed and experimentally validated. The results demonstrate its capability to generate a variety of reconfigurable radar phantoms in high‐resolution range profiles (HRRPs) in real time. Furthermore, both human radar image interpretation and artificial neural network (ANN)‐based classification exhibit high confidence in identifying the modulated imagery as authentic targets, thereby confirming the effectiveness of deception. The developed metasurface and its associated modulation strategy hold significant promise for critical target protection in electronic warfare scenarios.
{"title":"Information Metasurface‐Enabled Dynamically Reconfigurable Radar Electromagnetic Phantoms","authors":"Shijian Yu, Jinxing Guo, Dongfang Guan, Zhen Liu, Yongxiang Liu","doi":"10.1002/lpor.202502619","DOIUrl":"https://doi.org/10.1002/lpor.202502619","url":null,"abstract":"Radar electromagnetic phantoms aim to deceive radar systems by introducing virtual targets—entities that do not physically exist—into radar imagery, thereby inducing erroneous recognition. Information metasurfaces, functioning as digitally reconfigurable electromagnetic reflectors, offer unprecedented capabilities in multidimensional radar target signatures control. Nevertheless, existing space‐coding‐based techniques are constrained by static phantom image templates, limiting their ability to generate dynamically reconfigurable radar phantoms. Temporal modulation strategies are susceptible to synchronization errors under non‐cooperative scenarios. To address these challenges, this paper proposes a novel method for generating image‐level, dynamically stable, and reconfigurable radar electromagnetic phantoms via information metasurfaces. The proposed approach leverages the geometric theory of diffraction (GTD) to extract characteristic parameters oftargets. These parameters subsequently guide the design of asynchronous frequency‐modulated sequences implemented on the metasurface. A 1‐bit information metasurface prototype was developed and experimentally validated. The results demonstrate its capability to generate a variety of reconfigurable radar phantoms in high‐resolution range profiles (HRRPs) in real time. Furthermore, both human radar image interpretation and artificial neural network (ANN)‐based classification exhibit high confidence in identifying the modulated imagery as authentic targets, thereby confirming the effectiveness of deception. The developed metasurface and its associated modulation strategy hold significant promise for critical target protection in electronic warfare scenarios.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"34 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089280","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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