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Meta-image displays using unidirectional guided-wave-driven metasurfaces. 元图像显示使用单向导波驱动的元表面。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564941
Shiqing Li, Lixing Chen, Min Kang, Juan Deng, Jinhua Yan, Hang Zhang, Linfang Shen
{"title":"Meta-image displays using unidirectional guided-wave-driven metasurfaces.","authors":"Shiqing Li, Lixing Chen, Min Kang, Juan Deng, Jinhua Yan, Hang Zhang, Linfang Shen","doi":"10.1364/OL.564941","DOIUrl":"https://doi.org/10.1364/OL.564941","url":null,"abstract":"<p><p>Metasurfaces can freely manipulate the wavefronts of incident beams, making them a highly effective platform for holographic imaging or nanoprinting. However, their on-chip integration is hindered by the need for external light excitation, and the resonant nature of the meta-atoms that compose them presents a challenge for achieving meta-image with super-resolution. In this work, by leveraging the unique dispersion properties of unidirectional guided waves instead of resonant meta-atoms, we introduce a novel approach to realize meta-imaging. We validate this approach through the design of two microwave metasurfaces utilizing metal-air-gyromagnetic unidirectional surface magnetoplasmons (USMPs). The metasurfaces efficiently convert guided waves into an image of the letter \"A\" and the Greek letter \"ϕ\" with super-resolution, which is a challenge for conventional meta-imaging. The strategy presented here offers a promising alternative for achieving meta-image displays, thus opening new possibilities for the development of integrated plasmonic networks and devices.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4390-4393"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541728","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
Observation of an all-fiber Fano resonance comb. 全纤维法诺共振梳的观察。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565948
Xiaofang Li, Ya'nan Wang, Meiqi Zhou, Yongchang Zhang, Xinxin Jin, Jianfu Xia, Yanmin Duan, Haiyong Zhu, Zhihong Li
{"title":"Observation of an all-fiber Fano resonance comb.","authors":"Xiaofang Li, Ya'nan Wang, Meiqi Zhou, Yongchang Zhang, Xinxin Jin, Jianfu Xia, Yanmin Duan, Haiyong Zhu, Zhihong Li","doi":"10.1364/OL.565948","DOIUrl":"https://doi.org/10.1364/OL.565948","url":null,"abstract":"<p><p>This study demonstrates the generation of a tunable all-fiber Fano resonance comb by incorporating a 10° tilted fiber Bragg grating (TFBG) into an all-fiber Mach-Zehnder interferometer (MZI). The TFBG generates the discrete state that couples with the continuum state of the MZI to produce all-fiber Fano resonance comb spanning an 80 nm spectral range. This system exhibits precise tunability, enabling continuous transitions among asymmetric Fano line shape, symmetric electromagnetically induced transparency, and electromagnetically induced absorption line shapes. The results also demonstrate that key spectral parameters, including the Fano parameter <i>q</i>, slope rate, and extinction ratio, exhibit periodic variation. The proposed approach offers a robust, low-loss, and scalable solution for multi-Fano resonance generation and holds promise for applications of high-sensitivity sensing and optical switching.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4202-4205"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541733","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
Optical radiation manipulation via topological polarization singularities. 通过拓扑偏振奇点的光辐射操纵。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.563227
Bo Yan, Siqi Zhang, Suhua Luo, Bing Zhang, Yanbo Pei, Xiangqian Jiang
{"title":"Optical radiation manipulation via topological polarization singularities.","authors":"Bo Yan, Siqi Zhang, Suhua Luo, Bing Zhang, Yanbo Pei, Xiangqian Jiang","doi":"10.1364/OL.563227","DOIUrl":"https://doi.org/10.1364/OL.563227","url":null,"abstract":"<p><p>Bound states in the continuum (BICs) and unidirectional guided resonances (UGRs) can be controlled by manipulation of the topological polarization singularity (TPS). Previous studies have shown that the BICs can be generated by the vortex polarization singularities (<i>V</i> points) with the same topological charge in upward and downward radiation. Here, we propose a class of off-Γ hetero-topological charge BICs constructed from a pair of <i>V</i> points with opposite topological charges under a structure with inversion symmetry. In addition, a pair of circular polarization states (<i>C</i> points) in the upward or downward radiation can incompletely block radiation to form quasi-UGRs. This implies that radiation can be controlled by manipulating TPSs. Our findings provide new, to the best of our knowledge, insights into the generation of off-Γ hetero-topological charge BICs and the important role of manipulating topological polarization singularities in the light-matter interaction.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4326-4329"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541736","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
Optimized phase retrieval for accelerated snapshot coherent diffraction imaging via Babinet illumination. Babinet照明下加速快照相干衍射成像的相位检索优化。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.561543
Wei Zhang, Guancheng Huang, Zhengyu Wu, Bin Gao, Hang Chen, Wei Liu, Zhengjun Liu, Shutian Liu, Yutong Li
{"title":"Optimized phase retrieval for accelerated snapshot coherent diffraction imaging via Babinet illumination.","authors":"Wei Zhang, Guancheng Huang, Zhengyu Wu, Bin Gao, Hang Chen, Wei Liu, Zhengjun Liu, Shutian Liu, Yutong Li","doi":"10.1364/OL.561543","DOIUrl":"https://doi.org/10.1364/OL.561543","url":null,"abstract":"<p><p>Single-shot coherent diffraction imaging (CDI) using binary mask modulation suffers from limited intrinsic information, relying heavily on various prior constraints, as challenges of slow reconstruction speed and poor reconstruction quality. In this paper, we propose a snapshot method via Babinet illumination. Taking advantage of the fast modulation characteristics of digital micromirror devices, the imaging process can be completed instantly without the need for any mechanical displacement. The reconstruction algorithm utilizes an optimized phase retrieval approach, incorporating a complex gradient sparsity prior, and iteratively solves the optimization problem using the alternating direction method of the multipliers method. Experiments have proved that the proposed method can achieve fast and high-quality coherent diffraction imaging.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4422-4425"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541738","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
Particle-free velocity and temperature field imaging using krypton laser-induced fluorescence. 使用氪激光诱导荧光的无粒子速度和温度场成像。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.561670
Abinash Sahoo, Venkateswaran Narayanaswamy, Kevin M Lyons
{"title":"Particle-free velocity and temperature field imaging using krypton laser-induced fluorescence.","authors":"Abinash Sahoo, Venkateswaran Narayanaswamy, Kevin M Lyons","doi":"10.1364/OL.561670","DOIUrl":"https://doi.org/10.1364/OL.561670","url":null,"abstract":"<p><p>Particle-free simultaneous velocimetry and thermometry of gaseous flow are demonstrated using krypton (Kr) planar laser-induced fluorescence (PLIF). Spectral properties of the Kr 5<i>p</i>[32]<sub>2</sub>←←4<i>p</i><sup>6</sup><i>S</i>01 absorption profile are leveraged to obtain time-averaged 2D temperature and velocity (in the direction of the laser propagation) fields in a heated M = 0.74 turbulent jet issuing into ambient. Synthetic asymmetric Voigt profiles are fitted to the measured Kr absorption profile, and the resultant collisional widths are mapped to obtain the local temperatures. Doppler shift fields in combination with temperatures are used to obtain the corresponding velocity fields. Whereas the measured mean temperature fields agree to within 7% deviation of the computed temperature field, velocity values show a maximum of 12% deviation.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4226-4229"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541740","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
Vertical integrated PtSe2/4H-SiC vdW heterojunction for ultra-sensitive UV imaging and flame detection. 垂直集成PtSe2/4H-SiC vdW异质结，用于超灵敏紫外成像和火焰检测。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.568387
Wanqing Wu, Dongyang Wu, Pei Lin, Bing Han, Zhifeng Shi, Yongtao Tian, Xinjian Li, Longhui Zeng, Di Wu
{"title":"Vertical integrated PtSe<sub>2</sub>/4H-SiC vdW heterojunction for ultra-sensitive UV imaging and flame detection.","authors":"Wanqing Wu, Dongyang Wu, Pei Lin, Bing Han, Zhifeng Shi, Yongtao Tian, Xinjian Li, Longhui Zeng, Di Wu","doi":"10.1364/OL.568387","DOIUrl":"https://doi.org/10.1364/OL.568387","url":null,"abstract":"<p><p>High-performance ultraviolet (UV) photodetectors are critically needed for a wide range of applications. However, simultaneously achieving high sensitivity and fast response speed remains a significant challenge. In this work, we demonstrate the fabrication of a vertical PtSe<sub>2</sub>/4H-SiC van der Waals heterostructure (vdWH) photodiode with an ultrathin AlO<sub>x</sub> interfacial passivation layer for UV detection. The synergistic combination of the high carrier mobility of 2D PtSe<sub>2</sub> and the strong UV absorption of 4H-SiC, along with the suppressed interface recombination and enhanced carrier collection, enables ultrasensitive and ultrafast self-powered UV detection. Moreover, the applications of PtSe<sub>2</sub>/4H-SiC device in UV imaging and flame detection are successfully demonstrated, highlighting its potential for next-generation UV optoelectronic devices and systems in biomedical diagnostics, space communications, and environmental monitoring.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4362-4365"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541765","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
Breaking the mid-spatial-frequency noise floor to sub-nanometer in Fizeau interferometry via anisotropic spatial-coherence engineering. 利用各向异性空间相干工程将菲索干涉测量中的中频噪声底破至亚纳米级。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.567026
Xinming Li, Shaojing Peng, Zhaorui Xu, Jian Bai, Lan Wu, Yibing Shen, Dong Liu
{"title":"Breaking the mid-spatial-frequency noise floor to sub-nanometer in Fizeau interferometry via anisotropic spatial-coherence engineering.","authors":"Xinming Li, Shaojing Peng, Zhaorui Xu, Jian Bai, Lan Wu, Yibing Shen, Dong Liu","doi":"10.1364/OL.567026","DOIUrl":"https://doi.org/10.1364/OL.567026","url":null,"abstract":"<p><p>Anisotropic spatial-coherence engineering via illumination modulation is demonstrated to selectively suppress the mid-spatial-frequency (MSF) noise in interferometry. Using a 3D spatial-coherence model, we prove the superiority of a synthetic ring source with anisotropic spatial-coherence function in Fizeau systems and reveal characteristic residual noise patterns of a zero-order Bessel function. A noise transfer function (NTF) is proposed as an essential complement to the instrument transfer function (ITF) framework, enabling quantitative assessment of noise suppression across all spatial frequencies. With the proposed method, NTF < 0.4 and ITF > 0.8 within 9.1 lp/mm are achieved in a 632.8-nm, 4-in. Fizeau interferometer, breaking the MSF noise floor to sub-1 nm. This work provides a rapid, full-aperture measurement solution for MSF errors on high-precision optical surfaces.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4410-4413"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541684","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
Chip-on-tip fluorescence lifetime imaging micro-camera toward endoscopic applications. 面向内窥镜应用的尖端荧光寿命成像微相机。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.561838
Dario Angelone, Noreen Nudds, Andrew B Matheson, Ahmet T Erdogan, Walter Messina, Ray Burke, Robert K Henderson, Stefan Andersson-Engels, Sanathana Konugolu Venkata Sekar
{"title":"Chip-on-tip fluorescence lifetime imaging micro-camera toward endoscopic applications.","authors":"Dario Angelone, Noreen Nudds, Andrew B Matheson, Ahmet T Erdogan, Walter Messina, Ray Burke, Robert K Henderson, Stefan Andersson-Engels, Sanathana Konugolu Venkata Sekar","doi":"10.1364/OL.561838","DOIUrl":"https://doi.org/10.1364/OL.561838","url":null,"abstract":"<p><p>We present a chip-on-tip fluorescence lifetime imaging micro-camera on a size scale compatible with endoscopic applications. The micro-camera has an external diameter of 4 mm and comprises a miniaturized 128 × 120 SPAD array detector, integrated imaging optics, and an optical fiber for excitation light delivery. The spatial performance is characterized by imaging a resolution test target showing that the integrated system is able to resolve features of <30<i>μ</i>m. The temporal response is measured at a range of wavelengths, yielding a mean pixel impulse response width of  < 1 ns. Benchmarking against a time-correlated single-photon counting system also shows good agreement with the micro-camera. Finally, fluorescence lifetime images of unlabeled <i>ex vivo</i> animal tissue samples are presented as examples.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4230-4233"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541689","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
Collimator-assisted high-precision calibration method for event cameras. 事件相机准直辅助高精度标定方法。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564294
Zibin Liu, Shunkun Liang, Banglei Guan, Dongcai Tan, Yang Shang, Qifeng Yu
{"title":"Collimator-assisted high-precision calibration method for event cameras.","authors":"Zibin Liu, Shunkun Liang, Banglei Guan, Dongcai Tan, Yang Shang, Qifeng Yu","doi":"10.1364/OL.564294","DOIUrl":"https://doi.org/10.1364/OL.564294","url":null,"abstract":"<p><p>Event cameras are a new type of brain-inspired visual sensor with advantages such as high dynamic range and high temporal resolution. The geometric calibration of event cameras, which involves determining their intrinsic and extrinsic parameters, particularly in long-range measurement scenarios, remains a significant challenge. To address the dual requirements of long-distance and high-precision measurement, we propose an event camera calibration method utilizing a collimator with flickering star-based patterns. The proposed method first linearly solves camera parameters using the sphere motion model of the collimator, followed by nonlinear optimization to refine these parameters with high precision. Through comprehensive real-world experiments across varying conditions, we demonstrate that the proposed method consistently outperforms existing event camera calibration methods in terms of accuracy and reliability.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4254-4257"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541691","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
Detection of gamma irradiation with milligray resolution using a slow-light fiber Bragg grating. 用慢光光纤布拉格光栅探测毫微米分辨率的伽马辐射。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565215
Bastien Van Esbeen, Chun-Wei Chen, Tommy Boilard, Martin Bernier, Christophe Caucheteur, Mateusz Śmietana, Jan Mrazek, Michal Kamradek, Andrei Stancalie, Razvan Mihalcea, Daniel Negut, Michel J F Digonnet
{"title":"Detection of gamma irradiation with milligray resolution using a slow-light fiber Bragg grating.","authors":"Bastien Van Esbeen, Chun-Wei Chen, Tommy Boilard, Martin Bernier, Christophe Caucheteur, Mateusz Śmietana, Jan Mrazek, Michal Kamradek, Andrei Stancalie, Razvan Mihalcea, Daniel Negut, Michel J F Digonnet","doi":"10.1364/OL.565215","DOIUrl":"https://doi.org/10.1364/OL.565215","url":null,"abstract":"<p><p>For many medical and safety applications, it is important to develop fiber sensors that can detect very low doses of gamma radiation (mGy) with integration times of 1 s or shorter. Here, we describe a sensor based on a new calorimetric technique that we believe is one of the most sensitive and compact reported to date. The fiber subjected to irradiation has a silica core doped with Ce-doped lutetium aluminum garnet nanocrystals selected to achieve a strong radiation-induced absorption (RIA). Light launched in the irradiated fiber is absorbed by RIA, the fiber heats up, and the temperature change is measured with a slow-light fiber Bragg grating (FBG) placed in physical contact with it. Thanks to the doped fiber's large RIA, and the excellent resolution (mK/√Hz) and low drift (a few mK/min) of the slow-light sensor, with 1.2 W of excitation power at 1040 nm, this sensor has a very low detection limit of ∼6 mGy/√Hz. Thanks to the use of a short FBG (7 mm), it is also extremely small. With straightforward improvements, the detection limit can be reduced to sub-mGy/√Hz. For <i>in situ</i> measurements, this technique can also be easily extended to use the slow-light FBG itself as the radiation sensor.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4398-4401"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541696","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
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