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Spatiotemporal Optical Vortices with Invariant Radius and Width 具有不变半径和宽度的时空光涡旋

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-19 DOI: 10.1002/lpor.202500318

Jie Cheng, Zelong Wu, Ao Sun, Chenhao Wan

引用次数: 0

High‐Q Chiral Janus Metasurfaces Based on Multipolar Resonances 基于多极共振的高Q手性两面曲面

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-19 DOI: 10.1002/lpor.202500205

Chaoyang Wang, Jiaju Wu, Jingyi Tian

{"title":"High‐Q Chiral Janus Metasurfaces Based on Multipolar Resonances","authors":"Chaoyang Wang, Jiaju Wu, Jingyi Tian","doi":"10.1002/lpor.202500205","DOIUrl":"https://doi.org/10.1002/lpor.202500205","url":null,"abstract":"Optical chiral metasurfaces provide distinct responses to circularly polarized light of different handedness, which hold great promise for practical applications in chiral lasers, biomedical sensors and drug development, etc. Recently, some fascinating Janus metasurfaces featuring asymmetric chiral transmission/reflection are demonstrated to boost the information capacity and enable efficient optical applications. However, the quality factor (Q‐factor) of the realized Janus chiral metasurfaces so far is relatively low due to substantial radiative loss under broken symmetry or the nonradiative loss inherent to the plasmonic structures. Apart from that, the realized asymmetric circular dichroism functionality is often limited. To address the issue, a multifunctional all‐dielectric chiral Janus metasurface supporting high‐Q multipolar resonances is proposed. By controlling both the in‐plane and out‐of‐plane symmetry of the metasurface, tunable high Q‐factor multipolar resonances with controllable far‐field polarization states can be achieved. This study showcases that for both top‐down and bottom‐up excitations, the high‐Q (Q > 3000) metasurface exhibits symmetric and maximum intrinsic chiroptical responses, and simultaneous high‐contrast asymmetric extrinsic chiroptical responses. Moreover, the near‐field unbalanced chiral responses of the metasurface also contribute to enhanced and unidirectional third‐harmonic generation. The study may offer a broadly applicable strategy for the design of high‐Q multifunctional spin‐selective optical devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"26 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144328650","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}

引用次数: 0

3D Trajectory Reconstruction of High-Speed Irregularly Moving Objects via Single-Photon Spatiotemporal Correlation 基于单光子时空相关的高速不规则运动物体三维轨迹重建

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-18 DOI: 10.1002/lpor.202500605

Shuxiao Wu, Jianyong Hu, Changgang Yang, Yanshan Fan, Jiaqing Ge, Fangyuan Jin, Yaole Cao, Zhixing Qiao, Guosheng Feng, Xilong Liang, Jianqiang Liu, Ruiyun Chen, Chengbing Qin, Guofeng Zhang, Liantuan Xiao, Suotang Jia

{"title":"3D Trajectory Reconstruction of High-Speed Irregularly Moving Objects via Single-Photon Spatiotemporal Correlation","authors":"Shuxiao Wu, Jianyong Hu, Changgang Yang, Yanshan Fan, Jiaqing Ge, Fangyuan Jin, Yaole Cao, Zhixing Qiao, Guosheng Feng, Xilong Liang, Jianqiang Liu, Ruiyun Chen, Chengbing Qin, Guofeng Zhang, Liantuan Xiao, Suotang Jia","doi":"10.1002/lpor.202500605","DOIUrl":"https://doi.org/10.1002/lpor.202500605","url":null,"abstract":"Capturing high-speed moving objects, particularly those with irregular motion, has always been a fundamental pursuit in the field of imaging. However, limited by the frame rate, sensitivity, and temporal resolution, it has persistently posed a significant challenge. In this paper, a trajectory reconstruction scheme for high-speed irregularly moving objects using single-photon spatiotemporal correlation is proposed. Since the trajectories of moving objects are continuous in 3D space, the emitted or reflected photons exhibit spatiotemporal correlation. By leveraging the sparsity of correlation features, a compressed sensing algorithm for 3D trajectory reconstruction based on discrete random photon detection is developed. The spatial position and arrival time of photons are captured by a single-photon avalanche photodiode array. Here, deviating from the conventional approach, the trajectory is reconstructed directly by extracting the correlations of photons, the maximum trackable angular velocity up to 180 rad s<sup>−1</sup>. Additionally, since background noise lacks spatiotemporal correlation, the proposed method exhibits excellent noise immunity. This ability to capture and track high-speed moving objects will provide new strategies for high-speed imaging applications in areas such as autonomous driving and the Internet of Things.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"51 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329148","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}

引用次数: 0

Magnetic Field‐Insensitive and Temperature‐Robust Spin‐Valley Relaxation in h‐BN Encapsulated Monolayer MoS2 氢氮化硼封装单层MoS2的磁场不敏感和温度鲁棒自旋谷弛豫

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-18 DOI: 10.1002/lpor.202500687

Yumeng Men, Meizhen Jiang, Lin Cheng, Jinlei Li, Tianqing Jia, Zhenrong Sun, Donghai Feng

{"title":"Magnetic Field‐Insensitive and Temperature‐Robust Spin‐Valley Relaxation in h‐BN Encapsulated Monolayer MoS2","authors":"Yumeng Men, Meizhen Jiang, Lin Cheng, Jinlei Li, Tianqing Jia, Zhenrong Sun, Donghai Feng","doi":"10.1002/lpor.202500687","DOIUrl":"https://doi.org/10.1002/lpor.202500687","url":null,"abstract":"While conventional understanding holds that electron spin‐valley relaxation in monolayer MoS2 is highly sensitive to weak transverse magnetic fields and thermal activation, the research reveals a different scenario when monolayer MoS2 is encapsulated in hexagonal boron nitride (h‐BN). Using time‐resolved Faraday rotation spectroscopy, it is found that the spin‐valley dynamics in h‐BN encapsulated monolayer MoS2 are independent of transverse magnetic fields and only weakly dependent on temperature. Notably, the spin‐valley polarization in h‐BN encapsulated monolayer MoS2 remains robust even at room temperature, exhibiting a biphasic behavior with lifetimes of 23 and 146 ps, attributed to itinerant electrons and trions, respectively. The study also clarifies the origin of the previously reported magnetic field‐sensitive spin‐valley component in monolayer MoS2, demonstrating that it likely originates from localized states rather than itinerant electrons and is absent in h‐BN encapsulated MoS2. These findings not only update the understanding of spin‐valley relaxation in monolayer MoS2 but also provide insights into the complexity and diversity of spin‐valley relaxation phenomena in monolayer transition metal dichalcogenides.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"24 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319494","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}

引用次数: 0

Femtosecond Optical Logic Gates Based on Tailored Spin-Selective Optical Stark Effect in Perovskite Chiral Metasurface 基于钙钛矿手性超表面自旋选择性Stark效应的飞秒光学逻辑门

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-18 DOI: 10.1002/lpor.202500526

Yi Zhang, Yulan Fu, Shifeng Feng, He Ma, Yiwei Zhang, Saisai Chu, Yuqing Yang, Ziyi Chen, Xinping Zhang

{"title":"Femtosecond Optical Logic Gates Based on Tailored Spin-Selective Optical Stark Effect in Perovskite Chiral Metasurface","authors":"Yi Zhang, Yulan Fu, Shifeng Feng, He Ma, Yiwei Zhang, Saisai Chu, Yuqing Yang, Ziyi Chen, Xinping Zhang","doi":"10.1002/lpor.202500526","DOIUrl":"https://doi.org/10.1002/lpor.202500526","url":null,"abstract":"The optical logic gates are the building blocks for all-optical computing and optical interconnect. Spin-based optical logic gates have the potential to enhance information capacity and processing speed, addressing the demand for handling the ever-growing amounts of information in next-generation optical networks. Rashba-Dresselhaus perovskites exhibit strong spin-orbit coupling and high exciton binding energy, making them promising candidates for realizing spin-based logic at room temperature. However, neither perovskite thin films nor single crystals are capable of delivering the high transient circular dichroism response necessary for developing ultrafast spin logic devices. Here, chiral metasurfaces are employed to tailor the spin-selective optical Stark effect in 2D perovskites by harnessing the unique chiral electric field distributions. All-optical spin-based AND, NOR, is demonstrated and NOT gates in the perovskite chiral metasurfaces with an ultrafast response time of 120 fs. This study offers a novel strategy for manipulating spin-dependent ultrafast electronic dynamics and highlights the potential applications of 2D perovskites in ultrafast optical spin-based devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"45 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329076","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}

引用次数: 0

Highly Bright Silicon Nanocrystal White Light-Emitting Diodes With Luminance in Excess of 10000 cd m⁻2 (Laser Photonics Rev. 19(12)/2025) 亮度超过10000 cd m的高亮度硅纳米晶体白光发光二极管（激光光子学Rev. 19(12)/2025）

IF 9.8 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-17 DOI: 10.1002/lpor.202570049

Fengyang Ma, Kaixin Liu, Zhongyao Yan, Liang Yu, Yanru Yang, Wuyan Zhao, Feilong Wang, Yaohua Li, Shuyu Zhang, Songyou Wang, Jian Sun, Ming Lu

引用次数: 0

Issue Information: Laser & Photon. Rev. 19(12)/2025 发行信息：Laser & Photon。启19 (12)/ 2025

IF 9.8 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-17 DOI: 10.1002/lpor.202570050

引用次数: 0

Tailored Frequency Conversion in Nonlinear Subwavelength Grating Metaslabs 非线性亚波长光栅的定制频率转换

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-17 DOI: 10.1002/lpor.202500241

Mai Tal, Hyunseung Jung, Jaeyeon Yu, Jiho Noh, Uriel Levy, Igal Brener, Tal Ellenbogen

引用次数: 0

Charge Transfer State: A New Sensitization Route for Blue‐LED‐Excitable Near‐Infrared Phosphors 电荷转移态：蓝色- LED -可激发近红外荧光粉的新敏化途径

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-17 DOI: 10.1002/lpor.202500750

Limin Wei, Jin‐Dou Huang, Hong Wang, Liqing Yan, Yutong Dong, Zhe He, Mingming Xing, Xixian Luo, Ying Tian

{"title":"Charge Transfer State: A New Sensitization Route for Blue‐LED‐Excitable Near‐Infrared Phosphors","authors":"Limin Wei, Jin‐Dou Huang, Hong Wang, Liqing Yan, Yutong Dong, Zhe He, Mingming Xing, Xixian Luo, Ying Tian","doi":"10.1002/lpor.202500750","DOIUrl":"https://doi.org/10.1002/lpor.202500750","url":null,"abstract":"Blue‐LED‐excitable Near‐infrared (NIR) phosphors doped with transition metal or rare‐earth ions hold great promise for next‐generation NIR light sources in phosphor‐converted LEDs (pc‐LEDs). However, current blue‐excitable NIR phosphors mainly rely on Cr3+ ion absorption, which involves forbidden transitions with limited efficiency. Here an allowed charge‐transfer (CT) transition is proposed as a novel sensitization route for blue‐LED‐excitable NIR phosphors. The broad sensitization band arising from the S2−→Yb3+ CT in NaLaS2:Yb3+ fully covers the entire blue wavelength region. Under 450 nm excitation, it exhibits intense NIR emission centered at 994 nm, with an internal quantum efficiency of 64%. This allows CT transition, with high absorption efficiency, leads to a notable external quantum efficiency of 45%. At 420 K, the emission intensity maintains 88.7% of that at room temperature. Coupled with a blue chip, a high‐performance NIR pc‐LED is fabricated with a photoelectric conversion efficiency of 15.5% and demonstrates its potential applications. These findings open new and efficient sensitization avenues for blue‐LED‐excitable phosphors.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"1 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311560","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}

引用次数: 0

Monolithic Spin-Multiplexing Metalens for Dual-Functional Imaging (Laser Photonics Rev. 19(12)/2025) 用于双功能成像的单片自旋复用超透镜（激光光子学Rev. 19(12)/2025）

IF 9.8 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-06-17 DOI: 10.1002/lpor.202570048

Zhenyu Xing, Zhelin Lin, Niu Liu, Hao Gao, Yuhui Hu, Zeyang Liu, Zijian Jiang, Xinliang Zhang, Cheng Zhang

引用次数: 0