Advanced Photonics Nexus最新文献_第2页

Coherently tiled Ti:sapphire laser amplification: a way to break the 10 petawatt limit on current ultraintense lasers 相干平铺钛：蓝宝石激光器放大：打破当前超强激光器 10 petawatt 限制的一种方法

Advanced Photonics Nexus Pub Date : 2023-11-01 DOI: 10.1117/1.APN.2.6.066009

Yanqi Liu, Keyang Liu, Zhaoyang Li, Y. Leng, Ruxin Li

引用次数: 0

Highly sensitive miniature needle PVDF-TrFE ultrasound sensor for optoacoustic microscopy 用于光声显微镜的高灵敏度微型针PVDF-TrFE超声传感器

Advanced Photonics Nexus Pub Date : 2023-08-16 DOI: 10.1117/1.apn.2.5.056006

Yu-Hang Liu, A. Kurnikov, Weiye Li, P. Subochev, D. Razansky

引用次数: 0

Nonconvex optimization for optimum retrieval of the transmission matrix of a multimode fiber 多模光纤传输矩阵最佳检索的非凸优化技术

Advanced Photonics Nexus Pub Date : 2023-08-02 DOI: 10.1117/1.APN.2.6.066005

Shengfu Cheng, Xuyu Zhang, T. Zhong, Huanhao Li, Haoran Li, Lei Gong, Honglin Liu, Puxiang Lai

{"title":"Nonconvex optimization for optimum retrieval of the transmission matrix of a multimode fiber","authors":"Shengfu Cheng, Xuyu Zhang, T. Zhong, Huanhao Li, Haoran Li, Lei Gong, Honglin Liu, Puxiang Lai","doi":"10.1117/1.APN.2.6.066005","DOIUrl":"https://doi.org/10.1117/1.APN.2.6.066005","url":null,"abstract":"Abstract. Transmission matrix (TM) allows light control through complex media, such as multimode fibers (MMFs), gaining great attention in areas, such as biophotonics, over the past decade. Efforts have been taken to retrieve a complex-valued TM directly from intensity measurements with several representative phase-retrieval algorithms, which still see limitations of slow or suboptimum recovery, especially under noisy environments. Here, we propose a modified nonconvex optimization approach. Through numerical evaluations, it shows that the optimum focusing efficiency is approached with less running time or sampling ratio. The comparative tests under different signal-to-noise levels further indicate its improved robustness. Experimentally, the superior focusing performance of our algorithm is collectively validated by single- and multispot focusing; especially with a sampling ratio of 8, it achieves a 93.6% efficiency of the gold-standard holography method. Based on the recovered TM, image transmission through an MMF is realized with high fidelity. Due to parallel operation and GPU acceleration, our nonconvex approach retrieves a 8685 × 1024 TM (sampling ratio is 8) with 42.3 s on average on a regular computer. The proposed method provides optimum efficiency and fast execution for TM retrieval that avoids the need for an external reference beam, which will facilitate applications of deep-tissue optical imaging, manipulation, and treatment.","PeriodicalId":223078,"journal":{"name":"Advanced Photonics Nexus","volume":"42 1","pages":"066005 - 066005"},"PeriodicalIF":0.0,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139352055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Operation of multiphonon-assisted laser in the nanosecond time scales 多声子辅助激光在纳秒时间尺度上的运行

Advanced Photonics Nexus Pub Date : 2023-07-31 DOI: 10.1117/1.apn.2.5.056004

Huichen Si, Fei Liang, Dazhi Lu, Haohai Yu, Huaijin Zhang, Yicheng Wu

{"title":"Operation of multiphonon-assisted laser in the nanosecond time scales","authors":"Huichen Si, Fei Liang, Dazhi Lu, Haohai Yu, Huaijin Zhang, Yicheng Wu","doi":"10.1117/1.apn.2.5.056004","DOIUrl":"https://doi.org/10.1117/1.apn.2.5.056004","url":null,"abstract":". Electron – phonon coupling can tailor electronic transition processes and result in direct lasing far beyond the fluorescence spectrum. The applicable time scales of these kinds of multiphonon-assisted lasers determine their scientific boundaries and further developments, since the response speed of lattice vibrations is much slower than that of electrons. At present, the temporal dynamic behavior of multiphonon-assisted lasers has not yet been explored. Herein, we investigate the Q-switched laser performance of ytterbium-doped YCa 4 O ð BO 3 Þ 3 (Yb:YCOB) crystal with phonon-assisted emission in nanosecond scales. Using different Q-switchers, the three-phonon-assisted lasers around 1130 nm were realized, and a stable Q-switching was realized in the time domain from submicroseconds to tens of nanoseconds. To the best of our knowledge, this is the longest laser wavelength in all pulse Yb lasers. The minimum pulse width and maximum pulse energy are 29 ns and 204 μ J, respectively. These results identify that the electron – phonon coupling is a fast physical process, at least much faster than the present nanosecond pulse width, which supports the operation of multiphonon-assisted lasers in the nanosecond range. In addition, we also provide a simple setup to create pulse lasers at those wavelengths with weak spontaneous emission.","PeriodicalId":223078,"journal":{"name":"Advanced Photonics Nexus","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122650618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advances in deep-learning-enhanced photoacoustic imaging 深度学习增强光声成像的最新进展

Advanced Photonics Nexus Pub Date : 2023-07-24 DOI: 10.1117/1.apn.2.5.054001

Jinge Yang, Seongwook Choi, Jiwoong Kim, Byullee Park, Chulhong Kim

引用次数: 1

Achieving higher photoabsorption than group III-V semiconductors in ultrafast thin silicon photodetectors with integrated photon-trapping surface structures 在集成光子捕获表面结构的超快薄硅光电探测器中实现比III-V族半导体更高的光吸收

Advanced Photonics Nexus Pub Date : 2023-07-24 DOI: 10.1117/1.apn.2.5.056001

Wayesh Qarony, A. Mayet, Ekaterina Ponizovskaya Devine, S. Ghandiparsi, Cesar Bartolo-Perez, Ahasan Ahamed, Amita Rawat, H. Mamtaz, Toshishige Yamada, Shih-Yuan Wang, M. Islam

引用次数: 1

Achromatic on-chip focusing of graphene plasmons for spatial inversions of broadband digital optical signals 用于宽带数字光信号空间反演的石墨烯等离子体片上消色差聚焦

Advanced Photonics Nexus Pub Date : 2023-07-24 DOI: 10.1117/1.apn.2.5.056003

Zhiyong Wu, Zheng Xu

{"title":"Achromatic on-chip focusing of graphene plasmons for spatial inversions of broadband digital optical signals","authors":"Zhiyong Wu, Zheng Xu","doi":"10.1117/1.apn.2.5.056003","DOIUrl":"https://doi.org/10.1117/1.apn.2.5.056003","url":null,"abstract":". On-chip focusing of plasmons in graded-index lenses is important for imaging, lithography, signal processing, and optical interconnects at the deep subwavelength nanoscale. However, owing to the inherent strong wavelength dispersion of plasmonic materials, the on-chip focusing of plasmons suffers from severe chromatic aberrations. With the well-established planar dielectric grating, a graded-index waveguide array lens (GIWAL) is proposed to support the excitation and propagation of acoustic graphene plasmon polaritons (AGPPs) and to achieve the achromatic on-chip focusing of the AGPPs with a focus as small as about 2% of the operating wavelength in the frequency band from 10 to 20 THz, benefiting from the wavelength-independent index profile of the GIWAL. An analytical theory is provided to understand the on-chip focusing of the AGPPs and other beam evolution behaviors, such as self-focusing, self-collimation, and pendulum effects of Gaussian beams as well as spatial inversions of digital optical signals. Furthermore, the possibility of the GIWAL to invert spatially broadband digital optical signals is demonstrated, indicating the potential value of the GIWAL in broadband digital communication and signal processing.","PeriodicalId":223078,"journal":{"name":"Advanced Photonics Nexus","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115001204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Differentiated design strategies toward broadband achromatic and polarization-insensitive metalenses 宽带消色差和偏光不敏感超透镜的差异化设计策略

Advanced Photonics Nexus Pub Date : 2023-07-22 DOI: 10.1117/1.apn.2.5.056002

Ximin Tian, Yafeng Huang, Junwei Xu, Tao Jiang, Pei Ding, Yaning Xu, Shenglan Zhang, Zhiyuan Li

{"title":"Differentiated design strategies toward broadband achromatic and polarization-insensitive metalenses","authors":"Ximin Tian, Yafeng Huang, Junwei Xu, Tao Jiang, Pei Ding, Yaning Xu, Shenglan Zhang, Zhiyuan Li","doi":"10.1117/1.apn.2.5.056002","DOIUrl":"https://doi.org/10.1117/1.apn.2.5.056002","url":null,"abstract":". Metasurfaces have emerged as a flexible platform for shaping the electromagnetic field via the tailoring phase, amplitude, and polarization at will. However, the chromatic aberration inherited from building blocks ’ diffractive nature plagues them when used in many practical applications. Current solutions for eliminating chromatic aberration usually rely on searching through many meta-atoms to seek designs that satisfy both phase and phase dispersion preconditions, inevitably leading to intensive design efforts. Moreover, most schemes are commonly valid for incidence with a specific spin state. Here, inspired by the Rayleigh criterion for spot resolution, we present a design principle for broadband achromatic and polarization-insensitive metalenses using two sets of anisotropic nanofins based on phase change material Ge 2 Sb 2 Se 4 Te 1 . By limiting the rotation angles of all nanofins to either 0 deg or 90 deg, the metalens with a suitable numerical aperture constructed by this fashion allows for achromatic and polarization-insensitive performance across the wavelength range of 4 – 5 μ m, while maintaining high focusing efficiency and diffraction-limited performance. We also demonstrate the versatility of our approach by successfully implementing the generation of broadband achromatic and polarization-insensitive focusing optical vortex. This work represents a major advance in achromatic metalenses and may find more applications in compact and chip-scale devices.","PeriodicalId":223078,"journal":{"name":"Advanced Photonics Nexus","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130357472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Review on near-field detection technology in the biomedical field 近场检测技术在生物医学领域的研究进展

Advanced Photonics Nexus Pub Date : 2023-07-01 DOI: 10.1117/1.APN.2.4.044002

Xitian Hu, Li Zhou, Xu Wu, Yan Peng

{"title":"Review on near-field detection technology in the biomedical field","authors":"Xitian Hu, Li Zhou, Xu Wu, Yan Peng","doi":"10.1117/1.APN.2.4.044002","DOIUrl":"https://doi.org/10.1117/1.APN.2.4.044002","url":null,"abstract":"Abstract. We review the recent biomedical detection developments of scanning near-field optical microscopy (SNOM), focusing on scattering-type SNOM, atomic force microscope-based infrared spectroscopy, peak force infrared microscopy, and photo-induced force microscopy, which have the advantages of label-free, noninvasive, and specific spectral recognition. Considering the high water content of biological samples and the strong absorption of water by infrared waves, we divide the relevant research on these techniques into two categories: one based on a nonliquid environment and the other based on a liquid environment. In the nonliquid environment, the chemical composition and structural information of biomedical samples can be obtained with nanometer resolution. In the liquid environment, these techniques can be used to monitor the dynamic chemical reaction process and track the process of chemical composition and structural change of single molecules, which is conducive to exploring the development mechanism of physiological processes. We elaborate their experimental challenges, technical means, and actual cases for three microbiomedical samples (including biomacromolecules, cells, and tissues). We also discuss the prospects and challenges for their development. Our work lays a foundation for the rational design and efficient use of near-field optical microscopy to explore the characteristics of microscopic biology.","PeriodicalId":223078,"journal":{"name":"Advanced Photonics Nexus","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123207522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Compact microring resonator based on ultralow-loss multimode silicon nitride waveguide 基于超低损耗多模氮化硅波导的小型微环谐振器

Advanced Photonics Nexus Pub Date : 2023-07-01 DOI: 10.1117/1.APN.2.4.046007

Shuai Cui, Kaixiang Cao, Zhao Pan, Xiaoyan Gao, Yu Yu, Xinliang Zhang

{"title":"Compact microring resonator based on ultralow-loss multimode silicon nitride waveguide","authors":"Shuai Cui, Kaixiang Cao, Zhao Pan, Xiaoyan Gao, Yu Yu, Xinliang Zhang","doi":"10.1117/1.APN.2.4.046007","DOIUrl":"https://doi.org/10.1117/1.APN.2.4.046007","url":null,"abstract":"Abstract. Silicon nitride (Si3N4) waveguides with high confinement and low loss have been widely used in integrated nonlinear photonics. Indeed, state-of-the-art ultralow-loss Si3N4 waveguides are all fabricated using complex fabrication processes, and all of those reported that high Q microring resonators (MRRs) are fabricated in laboratories. We propose and demonstrate an ultralow-loss Si3N4 racetrack MRR by shaping the mode using a uniform multimode structure to reduce its overlap with the waveguide. The MRR is fabricated by the standard multi project wafer (MPW) foundry process. It consists of two multimode straight waveguides (MSWs) connected by two multimode waveguide bends (MWBs). In particular, the MWBs are based on modified Euler bends, and an MSW directional coupler is used to avoid higher-order mode excitation. In this way, although a multimode waveguide is used in the MRR, only the fundamental mode is excited and transmitted with ultralow loss. Meanwhile, thanks to the 180 deg Euler bend, a compact chip footprint of 2.226 mm perimeter with an effective radius as small as 195 μm and a waveguide width of 3 μm is achieved. Results show that based on the widely used MPW process, a propagation loss of only 3.3 dB / m and a mean intrinsic Q of around 10.8 million are achieved for the first time.","PeriodicalId":223078,"journal":{"name":"Advanced Photonics Nexus","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116548530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1