Optics letters最新文献_第5页

Mid-infrared giant optical chirality induced by multipole degeneracy in a diamond metasurface.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.550219

Hao Wang, Shu Chen, Xing Liu, Yanan Yu, Ting-Hui Xiao, Chong-Xin Shan

引用次数: 0

Monocular line scan vision-based surface defect detection approach for highly reflective bearing balls.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.555821

Qing Wang

{"title":"Monocular line scan vision-based surface defect detection approach for highly reflective bearing balls.","authors":"Qing Wang","doi":"10.1364/OL.555821","DOIUrl":"https://doi.org/10.1364/OL.555821","url":null,"abstract":"Surface defects strongly affect the stability and service life of bearing balls. In this Letter, I present a monocular line scan vision-based detection system for detecting surface defects on bearing balls. An optical system was designed to solve the problems of nondevelopability, large spherical curvature, and high reflection of bearing ball surfaces. The principle of light illuminating bearing balls was developed. By analyzing the motion unfolding trajectory curve, I propose a line scanning unfolding process and image acquisition scheme for the whole surface of the bearing ball. According to the unfolding principle, I have established a mathematical model of the whole-surface bearing ball unfolding process and developed a simulation. Experiments were performed to capture the surface image of bearing balls. A defect detection algorithm for spatiotemporal image is developed. A subtraction operation is used to enhance the defect information. Spatial-temporal resolution normalization is developed to make the scale of spatiotemporal image uniform and extract the surface defects. The experimental results show that the detection resolution of the crack defects is approximately 0.001 mm2, and the crack defect detection rate is 100%, which demonstrates that the proposed method has high detection accuracy.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 4","pages":"1425-1428"},"PeriodicalIF":3.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143416869","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

Soliton generation through temporal reflection in media with a frequency-dependent nonlinearity.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.547951

Lucas N Gutierrez, Pablo I Fierens, Diego F Grosz, Santiago M Hernandez

引用次数: 0

Direct observation of the enhanced photonic spin Hall effect in a subwavelength grating.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.549579

Nikolai I Petrov, Yuri M Sokolov, Vladimir V Stoiakin, Viktor A Danilov, Vladimir V Popov, Boris A Usievich

{"title":"Direct observation of the enhanced photonic spin Hall effect in a subwavelength grating.","authors":"Nikolai I Petrov, Yuri M Sokolov, Vladimir V Stoiakin, Viktor A Danilov, Vladimir V Popov, Boris A Usievich","doi":"10.1364/OL.549579","DOIUrl":"https://doi.org/10.1364/OL.549579","url":null,"abstract":"The photonic spin Hall effect (PSHE) in surface plasmon resonance (SPR) structures has great potential for various polarization-sensitive applications and devices. Here, using optical weak measurement, we observe spin-dependent and spin-independent angular shifts of the reflected beam, enhanced by SPR in a subwavelength nickel grating. An enhanced in-plane photonic spin Hall effect manifested in the angular splitting of circularly polarized photons with opposite helicity signs is demonstrated. We theoretically and experimentally demonstrate that angular in-plane shifts can be changed from spin-independent (Goos-Hänchen (GH) shift) to spin-dependent (PSHE) when the incident beam polarization state changes. The SPR-induced depolarization of light and the mixing of polarization states are detected. High purity of spin separation and a high degree of circular polarization are achieved with an optimal polarization state (preselection angle) and a resonance angle of incidence. A novel, to the best of our knowledge, phenomenon of the spinless spatial separation of two orthogonal components of the field with diagonal linear polarizations is demonstrated.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 4","pages":"1317-1320"},"PeriodicalIF":3.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143416724","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

Generation of tunable longitudinal superchirality by a vector-light metalens.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.547011

Wenjing Sun, Jialu Zhu, Ying Liu, Weijie Shi, Shuyan Zhang, Zhenggao Dong

{"title":"Generation of tunable longitudinal superchirality by a vector-light metalens.","authors":"Wenjing Sun, Jialu Zhu, Ying Liu, Weijie Shi, Shuyan Zhang, Zhenggao Dong","doi":"10.1364/OL.547011","DOIUrl":"https://doi.org/10.1364/OL.547011","url":null,"abstract":"The high sensitivity detection of chirality is of great importance in fields of physics, biology, and life sciences. Emerging strategies attempt to generate the superchiral fields with metasurfaces to maximize the chiral light-matter interaction. Although these studies have mostly considered the transverse superchirality, the longitudinal optical chirality also plays a very important role in chiral interactions. In this paper, the conditions for generating the optimal longitudinal superchirality are demonstrated with vector diffraction theory. Accordingly, a metalens is designed to generate vector beams as a replacement of conventional optical elements. Moreover, by modifying the polarization state of the incident light from linear to circular polarization, the longitudinal superchirality can be continuously tuned from zero to more than 70 times of the intrinsic chirality of circularly polarized light. Our theoretical analysis as well as the numerical demonstration by a vector-light metalens highlights the generation of tunable longitudinal superchirality, paving a nanophotonic way for the longitudinal chiral sensing.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 4","pages":"1405-1408"},"PeriodicalIF":3.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143416825","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-speed reconfigurable spatiotemporal beam scanning enabled by a frequency-encoded optical phased array.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.544872

Yuqiu Zhang, Hongxiang Chang, Zhongquan Nie, Bowang Shu, Shiqing Tang, Jinyong Leng, Jian Wu, Pu Zhou

{"title":"High-speed reconfigurable spatiotemporal beam scanning enabled by a frequency-encoded optical phased array.","authors":"Yuqiu Zhang, Hongxiang Chang, Zhongquan Nie, Bowang Shu, Shiqing Tang, Jinyong Leng, Jian Wu, Pu Zhou","doi":"10.1364/OL.544872","DOIUrl":"https://doi.org/10.1364/OL.544872","url":null,"abstract":"Laser beam scanning technology has potential applications in various fields, including LIDAR, laser processing, and optical communication. However, the capability of non-mechanical beam scanning is limited by the response time of an optical element, posing challenges in achieving both high-speed scanning and reconfigurable output beams. Here we propose a new concept, to the best of our knowledge, of the frequency-encoded optical phased array (OPA) to enable high-speed reconfigurable dynamic scanning. This is achieved by employing the customized frequency deviations on the array elements of the OPA. It is turned out that, in this way, the dynamic spatiotemporal beams with continuous scanning capability can be realized. We further find that the scanning speed is linearly proportional to the frequency deviation. Moreover, we are able to give access to multi-directional and customizable structured spatiotemporal beam scanning by encoding the on-demand frequency and phase deviations. The approach proposed here might be useful for high-speed reconfigurable beam scanning with high-power output.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 4","pages":"1212-1215"},"PeriodicalIF":3.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143416847","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

Nonlinear correction of FMCW LIDAR based on the superlets transform algorithm.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.554813

Jun Feng, Xingyan Zhao, Yang Qiu, Qize Zhong, Yuan Dong, Shaonan Zheng, Ting Hu

{"title":"Nonlinear correction of FMCW LIDAR based on the superlets transform algorithm.","authors":"Jun Feng, Xingyan Zhao, Yang Qiu, Qize Zhong, Yuan Dong, Shaonan Zheng, Ting Hu","doi":"10.1364/OL.554813","DOIUrl":"https://doi.org/10.1364/OL.554813","url":null,"abstract":"In frequency-modulated continuous wave (FMCW) light detection and ranging (LIDAR), the nonlinearity of the laser frequency modulation causes an increase in the full width at half maximum (FWHM) of the beat signal. This increase seriously affects the ranging precision. In this Letter, a nonlinear correction method based on superlets transform (SLT) is proposed to build a FMCW LIDAR measurement system with an auxiliary interferometer. The time-frequency relation is extracted from the SLT result of the auxiliary path beat signal, and an interpolation sequence is generated to resample the measurement path beat signal, so as to improve the linearity. Experiment results show that the nonlinearity after resampling reaches 2.60 × 10-10, and when the length of the extended fiber for simulating laser transmission is 13 times to the length of the auxiliary fiber, the spectrum still has obvious peaks. The average standard deviation (SD) and average resolution of the ranging within 2.5 m are 2.3 mm and 4.8 cm, respectively. The average SD of the velocity measurement within 6 cm/s is 7.7 mm/s.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 4","pages":"1389-1392"},"PeriodicalIF":3.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143416878","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

Photonic spin rings formed by toroidal spin momentum.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.549910

Qi Lu, Shuangchun Wen, Hailu Luo, Weixing Shu

引用次数: 0

White-light biospeckle displacement analysis for the assessment of fruit quality.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.549334

Davood Khodadad, Hamed Sabahno

引用次数: 0

Structural and mid-infrared optical properties of sputtered silicon films on silicon and silicon carbide substrates.

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-02-15 DOI: 10.1364/OL.541415

Soheil Farazi, Tom Tiwald, Srinivas Tadigadapa

{"title":"Structural and mid-infrared optical properties of sputtered silicon films on silicon and silicon carbide substrates.","authors":"Soheil Farazi, Tom Tiwald, Srinivas Tadigadapa","doi":"10.1364/OL.541415","DOIUrl":"https://doi.org/10.1364/OL.541415","url":null,"abstract":"This Letter presents an investigation into the mid-infrared (mid-IR) optical properties of sputter-deposited silicon films, highlighting the impact of deposition temperature and post-deposition annealing. We explore the nuanced effects these factors have on the characteristics of silicon films deposited on various substrates, including monocrystalline silicon and silicon carbide (SiC), by employing transmission electron microscopy (TEM), grazing incidence x-ray diffraction (GIXRD), and ellipsometry. Our findings reveal that sputtering temperature and annealing treatment significantly influence the optical and structural properties of the silicon films, with high-temperature sputtering leading to the formation of polycrystalline structures on top of amorphous layers deposited on the SiC substrate. Additionally, this study presents the mid-IR optical properties of films deposited on SiC substrates at high temperatures. This research fills a gap in the existing literature regarding the mid-IR properties of sputtered silicon films and offers valuable insights for applications in silicon photonics, photovoltaics, solar cells, and mid-IR light sources, thus contributing to the advancement of technologies in optics and materials science.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 4","pages":"1397-1400"},"PeriodicalIF":3.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143416704","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