Optics letters最新文献_第8页

Energy-efficient underwater wireless optical semantic communication based on channel-adaptive conditional computation. 基于信道自适应条件计算的高效水下无线光语义通信。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-17 DOI: 10.1364/OL.610039

Jie Xu, Zhitong Huang, Yi Gao, Yuefeng Ji

{"title":"Energy-efficient underwater wireless optical semantic communication based on channel-adaptive conditional computation.","authors":"Jie Xu, Zhitong Huang, Yi Gao, Yuefeng Ji","doi":"10.1364/OL.610039","DOIUrl":"https://doi.org/10.1364/OL.610039","url":null,"abstract":"Existing underwater wireless optical semantic communication (UWOSC) systems lack the ability to adapt the computational load to varying channel conditions, which leads to energy inefficiency and thus limits their application on energy-constrained underwater devices, such as autonomous underwater vehicles and underwater sensor nodes. In this Letter, we introduce conditional computation into UWOSC for the first time, to the best of our knowledge, and develop an energy-efficient UWOSC system based on channel-adaptive conditional computation for image transmission. Specifically, we design a semantic codec that supports early computation termination and employ a two-stage knowledge distillation strategy, enabling the system to perform semantic transmission over multiple computational paths. A semantic outage probability-guided path selector is further designed to adaptively determine the computational path according to channel conditions. Experimental results demonstrate that the proposed UWOSC system achieves superior transmission performance over traditional UWOC systems with lower energy consumption, while maintaining competitive performance relative to existing UWOSC schemes.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5689-5692"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Light-driven lattice reconfiguration for terahertz functional metamaterials. 太赫兹功能超材料的光驱动晶格重构。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-14 DOI: 10.1364/OL.608504

Vanlal Rinfela, Sutopa Modak, Sangram Kumar Sadhu, Manukumara Manjappa, Prem Pal, Abhishek Kumar, Manoj Gupta, Yogesh Kumar Srivastava

引用次数: 0

High-efficiency slow-light modulator on thin-film lithium tantalate operating at high optical power. 高光功率下钽酸锂薄膜的高效慢光调制器。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-17 DOI: 10.1364/OL.610470

QingQing Han, Yuqi Chen, Min Sun, Jingchi Li, Xiong Ni, Xun Zhang, Wenfeng Zhou, Xin Wang, Jing Huang, Yahui Zhu, Zhengshun Lei, Yuchen Yin, Liucheng Fu, Di Zhang, Jian Xu, Yikai Su, Yong Zhang

{"title":"High-efficiency slow-light modulator on thin-film lithium tantalate operating at high optical power.","authors":"QingQing Han, Yuqi Chen, Min Sun, Jingchi Li, Xiong Ni, Xun Zhang, Wenfeng Zhou, Xin Wang, Jing Huang, Yahui Zhu, Zhengshun Lei, Yuchen Yin, Liucheng Fu, Di Zhang, Jian Xu, Yikai Su, Yong Zhang","doi":"10.1364/OL.610470","DOIUrl":"https://doi.org/10.1364/OL.610470","url":null,"abstract":"Integrated electro-optic (EO) modulators are essential interfaces between electrical and optical signals, but maintaining high modulation efficiency and broadband EO response under high optical power remains challenging. Here, we demonstrate a thin-film lithium tantalate (TFLT) Mach-Zehnder modulator combining 1-mm-long one-dimensional topological slow-light waveguides with capacitively loaded T-shaped traveling-wave electrodes. The device achieves a minimum Vπ of 3 V at 1560.408 nm, corresponding to a VπL of 0.3 V·cm. At 1550, 1558.957, 1559.798, 1560.11, and 1560.408 nm, the extracted VπL values remain consistent at 0 and 35 dBm off-chip input, with the latter corresponding to an estimated on-chip optical power of ~27 dBm (~500 mW). Multi-wavelength EO S21 measurements show no 3-dB roll-off within the 67 GHz measurement range, with the broadband response preserved under high optical power. The device supports 75 Gb/s OOK and 80/100 Gb/s PAM4 transmission, which remain achievable under the high-power condition. These results demonstrate a high-efficiency, broadband TFLT slow-light modulator operating at high optical power.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5806-5809"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

High-extinction-ratio polarizers using cascaded asymmetric directional couplers on silicon nitride for optical gyroscopes. 光学陀螺仪用氮化硅级联非对称定向耦合器的高消光比偏振器。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-17 DOI: 10.1364/OL.612410

YunRui Zhuang, Jian Shen, Shuai Lei, ShuXiao Wang, ChenXi Wang, JianMin Zhang, Dong Yang, WenCheng Yue, YongGe Li, Yan Cai

引用次数: 0

Loss-induced Janus bound states in the continuum and topological charge reversals. 连续介质中损耗诱导的Janus束缚态和拓扑电荷反转。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-21 DOI: 10.1364/OL.614020

Jiangbin Li, Shan Zhu, Qilin Duan, Jiahao Zhi, Huanyang Chen

{"title":"Loss-induced Janus bound states in the continuum and topological charge reversals.","authors":"Jiangbin Li, Shan Zhu, Qilin Duan, Jiahao Zhi, Huanyang Chen","doi":"10.1364/OL.614020","DOIUrl":"https://doi.org/10.1364/OL.614020","url":null,"abstract":"Bound states in the continuum (BICs) provide a powerful platform for controlling topological radiation. Currently, multiple topological charge reversals (TCRs) of BICs have not yet been widely investigated. Here, we propose a loss-engineering approach to dynamically realize two instances of TCRs of BICs mediated by a Janus BIC. Introducing tunable loss in one layer breaks the out-of-plane mirror symmetry while preserving the in-plane symmetry, resulting in asymmetric evolution of polarization singularities in the two radiation channels. At a critical loss, the circularly polarized states (C points) in the downward channel merge at the Γ point, forming a Janus BIC with asymmetric topological charges. Further increasing the loss regenerates C points with opposite charges, inducing a charge reversal of the BIC. During this loss-driven transition, the topological charges of the (upward, downward) channels evolve from (+1, +1) to (+1, -1) and finally to (-1, -1), exhibiting two instances of TCRs. These results highlight loss engineering as a powerful tool for manipulating BIC topology in chiral and non-Hermitian photonic systems.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5790-5793"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Probabilistic photonic computing based on chaotic Kerr optical frequency combs. 基于混沌克尔光频梳的概率光子计算。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-15 DOI: 10.1364/OL.611768

Qi Liang, Qiuquan Yan, Hao Ouyang, Chao Zhou, Hao Hao, Licheng Wang, Yilun Wang, Yuhua Tang, Jun Zhang, Tian Jiang

{"title":"Probabilistic photonic computing based on chaotic Kerr optical frequency combs.","authors":"Qi Liang, Qiuquan Yan, Hao Ouyang, Chao Zhou, Hao Hao, Licheng Wang, Yilun Wang, Yuhua Tang, Jun Zhang, Tian Jiang","doi":"10.1364/OL.611768","DOIUrl":"https://doi.org/10.1364/OL.611768","url":null,"abstract":"Artificial neural networks (ANNs) have become powerful tools for deciphering complex data patterns. However, conventional ANNs can be viewed as point estimators that fail to capture predictive uncertainty, leading to overconfident predictions. Probabilistic models grounded in Bayesian inference offer a principled framework for characterizing uncertainty, yet they are generally ill-suited for conventional deterministic computing architectures. Here, we propose and experimentally demonstrate a probabilistic photonic computing link based on chaotic Kerr optical frequency combs (CK-PPC). The intrinsic randomness of chaotic Kerr optical frequency combs is exploited as a native entropy source, and a cascade of Mach-Zehnder modulators with a micro-ring resonator (MRR) array is employed to realize the probabilistic photonic computing link. Building upon this platform, a hybrid Bayesian convolutional network (HBNN) is constructed and applied to blood-cell microscopic image classification and out-of-distribution (OOD) detection. Compared with conventional convolutional neural networks, our approach improves OOD detection by 23% while maintaining high recognition accuracy. This scheme paves the way toward integrable, high-speed probabilistic optical processors for trustworthy artificial intelligence in real-world scenarios.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5717-5720"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Enhancing Raman redshift via cross-circular polarization in an air-filled multipass cell for frequency down-conversion. 在频率下转换的充气多通电池中通过交叉圆偏振增强拉曼红移。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-21 DOI: 10.1364/OL.613538

Shixin Hu, Jinyu Pan, Donghan Liu, Tiandao Chen, Meng Pang, Zhiyuan Huang, Yuxin Leng, Ruxin Li

引用次数: 0

Active spin-selection and nonreciprocal transmission via nonlocal chiral guided resonance in magneto-optical meta-waveguides. 磁光元波导中非局部手性引导共振的主动自旋选择和非互易传输。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-21 DOI: 10.1364/OL.613644

Wu Fei, Chengchen Bi, Zhiheng Zhang, Shuying Yang, Youlong Yu, Jigang Hu

{"title":"Active spin-selection and nonreciprocal transmission via nonlocal chiral guided resonance in magneto-optical meta-waveguides.","authors":"Wu Fei, Chengchen Bi, Zhiheng Zhang, Shuying Yang, Youlong Yu, Jigang Hu","doi":"10.1364/OL.613644","DOIUrl":"https://doi.org/10.1364/OL.613644","url":null,"abstract":"Achieving intrinsic chirality and giant nonreciprocity for circularly polarized light (CPL) is of great importance in optical communication, quantum information, and advanced imaging. Here, we report a tunable magneto-optical meta-waveguide that can achieve dual narrow-band nonreciprocal transmission of CPL via nonlocal chiral guided resonances (GRs). We show, by breaking time-reversal symmetry, that the polarization states of two GRs at the Ґ point can be simultaneously modulated from linear to circular polarization by applying external magnetic fields, enabling dual-band unidirectional transmission of CPL with a contrast ratio up to 48 dB. Calculation results further reveal that high-quality (Q) chiral GRs are governed by spin-selective electric quadrupole and magnetic dipole resonances with a Q factor of 105. Moreover, the wavelength of asymmetric transmission can be tuned by modifying structural parameters, while giant transmission contrast remains higher than 35 dB. Our design offers versatility for advanced chiral wave manipulation, promising applications in optical communication, ultra-narrow spin filters, and nonreciprocal devices.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5846-5849"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Polarization-constrained ring-illumination microscopy for label-free relative 3D surface reconstruction. 用于无标记相对三维表面重建的偏振约束环照明显微镜。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-09-21 DOI: 10.1364/OL.611174

Hesong Jiang, Zhenrui Hu, Juan Zhang

引用次数: 0

Continuous-wave laser-based polarization-modulated maskless lithography with parallel meta-atom exposure for millimeter-scale LWIR metalenses. 基于连续波激光的平行元原子曝光偏振调制无掩模光刻技术用于毫米级LWIR超透镜。

IF 3.3 2区物理与天体物理

Optics letters Pub Date : 2026-10-15 Epub Date: 2026-10-06 DOI: 10.1364/OL.614867

Cheng Peng, Jiepeng Wu, Hao Wang, Hanghang Chi, Yiyu Zhan, Chuxin Xu, Qiang Li, Lijun Wu

{"title":"Continuous-wave laser-based polarization-modulated maskless lithography with parallel meta-atom exposure for millimeter-scale LWIR metalenses.","authors":"Cheng Peng, Jiepeng Wu, Hao Wang, Hanghang Chi, Yiyu Zhan, Chuxin Xu, Qiang Li, Lijun Wu","doi":"10.1364/OL.614867","DOIUrl":"https://doi.org/10.1364/OL.614867","url":null,"abstract":"Long-wave infrared (LWIR) metalenses are important for compact thermal imaging and remote sensing applications, and a rapid, cost-effective, and high-precision fabrication method is highly desirable. Here, we propose polarization-modulated maskless digital lithography based on a continuous-wave (CW) laser and a spatial light modulator (SLM). One SLM mask encodes N×N independently defined meta-atom patterns, transferred simultaneously to photoresist in one exposure through polarization-based phase-to-intensity conversion and demagnified 4f projection. Compared with sequential single-meta-atom exposure, the number of exposure steps is reduced to approximately 1/N2. Using this approach, we fabricated a 3 mm × 3 mm LWIR metalens with a numerical aperture of 0.25 at 10.6 µm. The device exhibits a measured focal-length error of 1% and a focusing efficiency of 54.7%. The CW laser significantly simplifies the system architecture, reducing capital equipment requirements and enabling a cost-effective and accessible platform for scalable fabrication of LWIR metasurfaces.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5906-5909"},"PeriodicalIF":3.3,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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