Journal of Optics最新文献_第2页

Bessel-Bessel-Gaussian vortex laser beams 贝塞尔-贝塞尔-高斯涡旋激光束

Journal of Optics Pub Date : 2024-08-09 DOI: 10.1088/2040-8986/ad6d7d

V. Kotlyar, E. Abramochkin, A. A. Kovalev

{"title":"Bessel-Bessel-Gaussian vortex laser beams","authors":"V. Kotlyar, E. Abramochkin, A. A. Kovalev","doi":"10.1088/2040-8986/ad6d7d","DOIUrl":"https://doi.org/10.1088/2040-8986/ad6d7d","url":null,"abstract":"\u0000 We obtain and investigate Bessel-Bessel-Gaussian vortex beams (BBG beams) with the complex amplitude being equal to a product of the Gaussian function with two Bessel functions, whose arguments are expressed as complicated radicals including the cylindrical coordinates and a free parameter that defines the shape of the intensity distribution. If this parameter is small, the intensity has the shape of an inhomogeneous ring. For larger values of this parameter, the intensity has the shape of two arcs or 'crescents', oriented by their concave sides to each other. The complex amplitude of such beams is derived in explicit form for an arbitrary distance from the waist. We demonstrate that the BBG beams rotate upon propagation anomalously fast: at a distance much shorter than the Rayleigh length, the intensity distribution is already rotated by almost 45º, whereas typically, the rotation angle of vortex Gaussian beams is equal to the Gouy phase. It is also shown that the parameter of the BBG beam allows controlling its topological charge: when the parameter value is positive and increases, the beam topological charge also increases stepwise by an even number. Besides, we study two other similar vortex BBG beams: either with four local intensity maxima, lying on the Cartesian coordinates axes, or with one intensity maximum with a crescent shape, whose center is on the horizontal axis. The derived three new families of asymmetric vortex laser beams, whose complex amplitude is described by explicit analytical expressions at an arbitrary distance from the waist, extend the variety of laser beams that can be used for manipulating and rotating microparticles, free space data transmission, and in quantum informatics.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924901","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

Stimulated Brillouin scattering in optimized photonic crystal fiber to achieve high Brillouin gain coefficient 优化光子晶体光纤中的受激布里渊散射实现高布里渊增益系数

Journal of Optics Pub Date : 2024-08-09 DOI: 10.1007/s12596-024-02115-2

Vikas Kumar, Ajay Kumar

引用次数: 0

Photophysical studies on donor-p-acceptor substituted 1,3,4-oxadiazole derivatives for optoelectronic application: experimental and theoretical analysis 用于光电应用的供体-受体取代型 1,3,4-恶二唑衍生物的光物理研究：实验和理论分析

Journal of Optics Pub Date : 2024-08-09 DOI: 10.1007/s12596-024-02023-5

A. K. Maniyar, Y. F. Nadaf, Syed Khasim, T. A. Hamdallah, M. V. Murugendrappa

引用次数: 0

High modulation depth and high modulated power with low noise figure for high speed modulation optical communication system performance signature 高调制深度、高调制功率和低噪声特性，为高速调制光通信系统的性能特征提供了证明

Journal of Optics Pub Date : 2024-08-08 DOI: 10.1007/s12596-024-02104-5

Megalan Leo Leon, Priscilla Mohanadoss, Arun Kumar Selvam, Kavitha Balamurugan, Rathanasabhapathy Gunasekaran, Nune Divya, Chandran Ramesh Kumar, A. I. Ferdous, A. Rashed

引用次数: 0

A numerical method for the Hirota equation in a dispersive optical media 色散光学介质中 Hirota 方程的数值方法

Journal of Optics Pub Date : 2024-08-08 DOI: 10.1007/s12596-024-02100-9

Régis Donald Hontinfinde, M. Ayela, Gaston Edah

引用次数: 0

Analyzing the evanescent field ratio of ridge waveguide based on different material platforms for sensing applications 分析基于不同材料平台的脊波导在传感应用中的蒸发场比率

Journal of Optics Pub Date : 2024-08-08 DOI: 10.1088/2040-8986/ad6ce4

M. A. Butt

{"title":"Analyzing the evanescent field ratio of ridge waveguide based on different material platforms for sensing applications","authors":"M. A. Butt","doi":"10.1088/2040-8986/ad6ce4","DOIUrl":"https://doi.org/10.1088/2040-8986/ad6ce4","url":null,"abstract":"\u0000 In this study, a comprehensive numerical investigation focusing on a ridge waveguide composed of various material platforms is undertaken, including silicon-on-insulator (SOI), silicon nitride (SiN), and SU-8 polymer. In the realm of photonic sensing devices, the evanescent field assumes paramount significance in facilitating light-matter interactions. The primary objective of this study is to furnish a comparative analysis discerning the suitability of these material platforms for sensing applications. The findings reveal distinct characteristics among the different material platforms. SOI emerges as a standout contender, exhibiting an augmented evanescent field ratio (EFR) that substantially enhances light-matter interaction. Following closely, SiN-based waveguides demonstrate commendable performance in this regard. Conversely, SU-8 polymer waveguides, characterized by larger dimensions, present limitations in evanescent field confinement, resulting in the lowest sensitivity among the materials investigated. Hence, the selection of the appropriate material platform and waveguide type emerges as a critical consideration in the design phase of photonic sensors. This decision significantly influences the sensor's performance and efficacy in real-world applications.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141925963","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

Photoluminescence studies and optimistic applications of KAlSiO4 phosphor synthesized by combustion method 燃烧法合成的 KAlSiO4 荧光粉的光致发光研究及优化应用

Journal of Optics Pub Date : 2024-08-08 DOI: 10.1007/s12596-024-02021-7

Samirkumar R. Bhelave, A. N. Yerpude, S. J. Dhoble

引用次数: 0

Data rates transmission, operation performance speed and figure of merit signature for various quadurature light sources under spectral and thermal effects 光谱和热效应下各种正交光源的数据传输率、运行性能速度和优劣特征图

Journal of Optics Pub Date : 2024-07-16 DOI: 10.1007/s12596-024-02032-4

P. K. Polasi, S. Vellela, Jammula Lakshmi Narayana, Judy Simon, N. Kapileswar, R. T. Prabu, A. Rashed

引用次数: 0

All optical 4-bit Galois field adder using 2-D photonic crystals 使用二维光子晶体的全光 4 位伽罗瓦场加法器

Journal of Optics Pub Date : 2024-07-16 DOI: 10.1007/s12596-024-02010-w

K. Maji, Kousik Mukherjee, M. Mandal