Journal of Optics最新文献_第7页

Yellow light privacy protection with anti-reflection structure based on photonic band gap principle 基于光子带隙原理的防反射黄光隐私保护结构

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-13 DOI: 10.1088/2040-8986/ad4726

Na Pei, Bao-Fei Wan, Sun-Xin Xie, Ting-Hao Zhang and Hai-Feng Zhang

引用次数: 0

On-axis complex-amplitude modulation for the generation of super-stable vector modes 用于产生超稳定矢量模式的轴向复振幅调制

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-12 DOI: 10.1088/2040-8986/ad4613

Valeria Rodríguez-Fajardo, Fernanda Arvizu, Dayver Daza-Salgado, Benjamin Perez-Garcia and Carmelo Rosales-Guzmán

{"title":"On-axis complex-amplitude modulation for the generation of super-stable vector modes","authors":"Valeria Rodríguez-Fajardo, Fernanda Arvizu, Dayver Daza-Salgado, Benjamin Perez-Garcia and Carmelo Rosales-Guzmán","doi":"10.1088/2040-8986/ad4613","DOIUrl":"https://doi.org/10.1088/2040-8986/ad4613","url":null,"abstract":"We propose a technique to generate complex vector beams with high quality and stability. Our approach relies on the combination of complex amplitude modulation (CAM) and on-axis modulation, two techniques that seem incompatible at first glance. The first one produces scalar structured light fields in phase and amplitude with high accuracy, while the second one is preferred for generating vector beams of great stability although of reduced quality. Specifically, the idea behind our technique is to send the shaped light produced by CAM co-axially with the zeroth order, rather than diffracted to the first order, as it is commonly done. We first describe our technique, explaining the generation of the hologram and experimental setup to isolate the desired vector mode, and then present experimental results that corroborate our approach. We first address the quality of the generated beams using Stokes polarimetry to reconstruct their transverse polarisation distribution, and then compare their stability against the same mode produced using a Sagnac interferometric method. Our vector beams are of good quality and remarkably stable, two qualities that we expect will appeal to the community working with vector modes.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"44 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140940169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Infrared imaging with nonlinear silicon resonator governed by high-Q quasi-BIC states 利用由高 Q 值准 BIC 状态支配的非线性硅谐振器进行红外成像

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-12 DOI: 10.1088/2040-8986/ad44a9

Gabriel Sanderson, Ze Zheng, Elizaveta Melik-Gaykazyan, George S D Gordon, Richard Cousins, Cuifeng Ying, Mohsen Rahmani and Lei Xu

{"title":"Infrared imaging with nonlinear silicon resonator governed by high-Q quasi-BIC states","authors":"Gabriel Sanderson, Ze Zheng, Elizaveta Melik-Gaykazyan, George S D Gordon, Richard Cousins, Cuifeng Ying, Mohsen Rahmani and Lei Xu","doi":"10.1088/2040-8986/ad44a9","DOIUrl":"https://doi.org/10.1088/2040-8986/ad44a9","url":null,"abstract":"Nonlinear light-matter interactions have emerged as a promising platform for various applications, including imaging, nanolasing, background-free sensing, etc. Subwavelength dielectric resonators offer unique opportunities for manipulating light at the nanoscale and miniturising optical elements. Here, we explore the resonantly enhanced four-wave mixing (FWM) process from individual silicon resonators and propose an innovative FWM-enabled infrared imaging technique that leverages the capabilities of these subwavelength resonators. Specifically, we designed high-Q silicon resonators hosting dual quasi-bound states in the continuum at both the input pump and signal beams, enabling efficient conversion of infrared light to visible radiation. Moreover, by employing a point-scanning imaging technique, we achieve infrared imaging conversion while minimising the dependence on high-power input sources. This combination of resonant enhancement and point-scanning imaging opens up new possibilities for nonlinear imaging using individual resonators and shows potential in advancing infrared imaging techniques for high-resolution imaging, sensing, and optical communications.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"24 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140940167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Single-shot pump-probe technique by the combination of an echelon and a grating with a time window of 109 ps 将梯形光栅和光栅结合使用的单次泵探技术，时间窗口为 109 ps

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-09 DOI: 10.1088/2040-8986/ad44af

Tianchen Yu, Junyi Yang, Zhongguo Li, Xingzhi Wu, Yu Fang, Yong Yang, Yinglin Song

{"title":"Single-shot pump-probe technique by the combination of an echelon and a grating with a time window of 109 ps","authors":"Tianchen Yu, Junyi Yang, Zhongguo Li, Xingzhi Wu, Yu Fang, Yong Yang, Yinglin Song","doi":"10.1088/2040-8986/ad44af","DOIUrl":"https://doi.org/10.1088/2040-8986/ad44af","url":null,"abstract":"In this study, using only a single pulse, pump-probe measurement with a large time window of more than 100 ps is implemented. A commercial grating is used to encode a time window of ∼56 ps in a single pulse; therefore, there is no need for machining customization. In addition, in this technique, the grating surface is accurately imaged, eliminating the image blur problem caused by phase differences in previous echelon-based techniques. Moreover, to make full use of the grating surface and obtain a larger time window, a simple reflection echelon is combined that matches the grating in the time window. This combination encoding strategy results in a total time window of ∼109 ps and maintains accurate imaging of the grating surface. This time window is an order of magnitude greater than the maximum reported values of the echelon encoding strategy and the angle beam encoding strategy. To demonstrate this single-shot pump-probe technique, the two-photon absorption process of ZnSe and the excited-state absorption process of a symmetrical phenoxazinium bromine salt were studied. The possibility of further improving the experimental setup is also discussed.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"5 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140940164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Dual-optical-multiplexing-based multi-image invisible visual cryptography 基于双光多路复用的多图像隐形视觉密码学

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-09 DOI: 10.1088/2040-8986/ad44ac

Xinyu Zhang, Xiaoshuang Shen, Yupeng Zhu, Zhaoke Mi, Yusi Zhu, Huiliang Zhang, Changjun Ke, Yishi Shi

引用次数: 0

Vectorial adaptive optics for advanced imaging systems 用于先进成像系统的矢量自适应光学系统

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-09 DOI: 10.1088/2040-8986/ad4374

Yifei Ma, Zimo Zhao, Jiahe Cui, Jingyu Wang, Chao He

引用次数: 0

Research on secure communication technology based on phase conjugate feedback chaotic injection system 基于相位共轭反馈混沌注入系统的安全通信技术研究

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-09 DOI: 10.1088/2040-8986/ad44a8

Jingbo Fu, Penghua Mu

引用次数: 0

New 4D hyperchaotic system’s application in image encryption 新型 4D 超混沌系统在图像加密中的应用

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-02 DOI: 10.1088/2040-8986/ad3e0d

Heming Xu and Jian Wang

引用次数: 0

Optical momentum distributions in monochromatic, isotropic random vector fields 单色各向同性随机矢量场中的光动量分布

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-02 DOI: 10.1088/2040-8986/ad3b14

Titouan Gadeyne and Mark R Dennis

引用次数: 0

Watermarking algorithm based on phase-only CGH in fractional Hartley domain for DICOM images 基于分数哈特利域中纯相位 CGH 的 DICOM 图像水印算法

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-05-02 DOI: 10.1088/2040-8986/ad3a77

Raman Yadav, Sachin and Phool Singh

{"title":"Watermarking algorithm based on phase-only CGH in fractional Hartley domain for DICOM images","authors":"Raman Yadav, Sachin and Phool Singh","doi":"10.1088/2040-8986/ad3a77","DOIUrl":"https://doi.org/10.1088/2040-8986/ad3a77","url":null,"abstract":"In this manuscript, we proposed a watermarking algorithm based on phase-only computer-generated holography (CGH) in the fractional Hartley domain for digital imaging and communications in medicine (DICOM) images. The proposed algorithm improves the security of the CGH-based algorithm. The cascaded use of fractional Hartley transform and attenuation factor increases the keyspace of the proposed watermarking algorithm. The robustness and effectiveness of the proposed watermarking algorithm is validated using simulations on DICOM images. The effectiveness of the proposed watermarking algorithm is assessed using statistical tools in terms of mean-squared error, information entropy, correlation coefficient, histogram, and mesh plots. The robustness is evaluated by testing the proposed algorithm’s performance under real-time threats, including contamination and data loss attacks. Furthermore, the security of the proposed algorithm is also tested for existing cryptographic attacks, such as chosen-plaintext attacks, and known-plaintext attacks. The simulation results indicate that the proposed watermarking algorithm is robust and effective.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"116 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140830430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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