Journal of Optics最新文献_第4页

Clarification of the transverse orbital angular momentum of spatiotemporal optical vortices 澄清时空光涡旋的横向轨道角动量

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-25 DOI: 10.1088/2040-8986/ad645a

Miguel A Porras

{"title":"Clarification of the transverse orbital angular momentum of spatiotemporal optical vortices","authors":"Miguel A Porras","doi":"10.1088/2040-8986/ad645a","DOIUrl":"https://doi.org/10.1088/2040-8986/ad645a","url":null,"abstract":"Advances in the generation and the application of spatiotemporal optical vortices (STOV) are proceeding fast, but fundamental aspects of their nature remain obscure. Bliokh (2023 Phys. Rev. A 107 L031501) (PRA) and Porras (2023 Prog. Electromagn. Res.177 95) (PIER) provide contradictory results on the transverse orbital angular momentum (OAM) carried by STOVs. We show that the results by Porras in PIER and by Bliokh in PRA refer to different STOVs and are all correct. In PIER, STOVs are elliptical at given cross section and time, or in space-time, but not in three-dimensional space. In PRA, STOVs are elliptical in space but not in space-time. This is evidenced from two dual, equivalent theories on the transverse OAM where a wave packet is seen in space-time evolving with propagation distance or in space evolving in time, that account for all values of the total, intrinsic and extrinsic OAM in PIERS and PRA. However, the intrinsic OAM with respect to the photon wave function center in PRA is not generally conserved, which advocates for the energy center in PIER as the STOV center. We argue that STOVs are generated in experiments to purportedly have elliptical symmetry in space-time. The values provided in PIER should then be taken as the reference for elliptical STOVs, and the theory therein to evaluate the transverse OAM of other wave packets. Hancock et al (2021 Phys. Rev. Lett.127 193901; 2024 Phys. Rev. X 14 011031) erroneously attribute the transverse OAM of elliptical STOVs in space to the elliptical STOVs in space-time that they consider theoretically and can generate in their experiments.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"26 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779831","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

Terahertz polarization sensing for influenza A virus based on plasmonic metasurface 基于等离子体元表面的太赫兹偏振传感甲型流感病毒

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-24 DOI: 10.1088/2040-8986/ad6168

Hai Liu, Xiaolin Wang, Cong Chen, Hongzhong Cui, Futao Cui, Yaowei Dai, Peng Gao, Senhao Duan, Zongyang Gao and Tong Zhou

{"title":"Terahertz polarization sensing for influenza A virus based on plasmonic metasurface","authors":"Hai Liu, Xiaolin Wang, Cong Chen, Hongzhong Cui, Futao Cui, Yaowei Dai, Peng Gao, Senhao Duan, Zongyang Gao and Tong Zhou","doi":"10.1088/2040-8986/ad6168","DOIUrl":"https://doi.org/10.1088/2040-8986/ad6168","url":null,"abstract":"Terahertz metasurface sensors attract extensive attention for excellent characterisics. However, most existing sensing schemes overlooked the polarization state of electromagnetic waves. Here, we propose a plasmonic metasurface sensor based on the elliptical polarization state of reflected EM wave, which can be used for the sensing of influenza A virus. The sensor achieves the conversion from linear polarization to circular polarization within 1–3 THz. By analysing the electromagnetic field distributions of the resonances at 1.43 THz and 2.16 THz, it can be concluded that the polarization conversion originates from the magnetic dipole. Besides, the sensor can characterize the changes in the complex refractive index of the test sample based on the elliptical polarization state of the reflected wave. The electromagnetic response of the metasurface sensor shows an excellent linear relationship between the rotating direction angle of polarization ellipse and the extinction coefficient (k) of the complex RI of the analyte. Furthermore, we also demonstrate the feasibility of detecting three subtypes of Influenza A viruses (H1N1, H5N2, and H9N2) at 1.39 THz though the elliptical polarization state. This sensing approach does not rely on high-precision broadband scanning, providing an alternative perspective for THz biosensing.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"23 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779830","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

On quantum states for angular position and angular momentum of light 关于光的角位置和角动量的量子态

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-17 DOI: 10.1088/2040-8986/ad5f9c

Bo-Sture K Skagerstam and Per K Rekdal

引用次数: 0

Roadmap on optical communications 光通信路线图

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-16 DOI: 10.1088/2040-8986/ad261f

Erik Agrell, Magnus Karlsson, Francesco Poletti, Shu Namiki, Xi (Vivian) Chen, Leslie A Rusch, Benjamin Puttnam, Polina Bayvel, Laurent Schmalen, Zhenning Tao, Frank R Kschischang, Alex Alvarado, Biswanath Mukherjee, Ramon Casellas, Xiang Zhou, Dora van Veen, Georg Mohs, Elaine Wong, Antonio Mecozzi, Mohamed-Slim Alouini, Eleni Diamanti and Murat Uysal

{"title":"Roadmap on optical communications","authors":"Erik Agrell, Magnus Karlsson, Francesco Poletti, Shu Namiki, Xi (Vivian) Chen, Leslie A Rusch, Benjamin Puttnam, Polina Bayvel, Laurent Schmalen, Zhenning Tao, Frank R Kschischang, Alex Alvarado, Biswanath Mukherjee, Ramon Casellas, Xiang Zhou, Dora van Veen, Georg Mohs, Elaine Wong, Antonio Mecozzi, Mohamed-Slim Alouini, Eleni Diamanti and Murat Uysal","doi":"10.1088/2040-8986/ad261f","DOIUrl":"https://doi.org/10.1088/2040-8986/ad261f","url":null,"abstract":"The Covid-19 pandemic showed forcefully the fundamental importance broadband data communication and the internet has in our society. Optical communications forms the undisputable backbone of this critical infrastructure, and it is supported by an interdisciplinary research community striving to improve and develop it further. Since the first ‘Roadmap of optical communications’ was published in 2016, the field has seen significant progress in all areas, and time is ripe for an update of the research status. The optical communications area has become increasingly diverse, covering research in fundamental physics and materials science, high-speed electronics and photonics, signal processing and coding, and communication systems and networks. This roadmap describes state-of-the-art and future outlooks in the optical communications field. The article is divided into 20 sections on selected areas, each written by a leading expert in that area. The sections are thematically grouped into four parts with 4–6 sections each, covering, respectively, hardware, algorithms, networks and systems. Each section describes the current status, the future challenges, and development needed to meet said challenges in their area. As a whole, this roadmap provides a comprehensive and unprecedented overview of the contemporary optical communications research, and should be essential reading for researchers at any level active in this field.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"39 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141721835","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

Optothermal generation, steady-state trapping, and 3D manipulation of bubbles: an experimental and theoretical analysis of the Marangoni effect 气泡的光热生成、稳态捕获和三维操控：马兰戈尼效应的实验和理论分析

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-10 DOI: 10.1088/2040-8986/ad5d02

Julio Aurelio Sarabia-Alonso and Rubén Ramos-García

{"title":"Optothermal generation, steady-state trapping, and 3D manipulation of bubbles: an experimental and theoretical analysis of the Marangoni effect","authors":"Julio Aurelio Sarabia-Alonso and Rubén Ramos-García","doi":"10.1088/2040-8986/ad5d02","DOIUrl":"https://doi.org/10.1088/2040-8986/ad5d02","url":null,"abstract":"Since Nobel Laureate Arthur Ashkin first introduced the trapping and manipulation of microparticles using light, numerous studies have explored this technique not only for dielectric/metallic particles but also for organic matter. This advancement has significantly expanded the landscape of non-contact and non-invasive micromanipulation at the nanometric scale. However, micromanipulation of particles with a refractive index smaller than the host medium, np< nm, proves challenging with Gaussian beams. To overcome this obstacle, a force known as thermocapillary, or the Marangoni force, has emerged as a straightforward trapping mechanism for bubbles in liquids. The Marangoni force results from the surface tension of bubbles, induced either thermally or chemically—by creating a temperature gradient or adding surfactants, respectively. The surface tension gradient on the liquid host induces tangential stress on the bubble wall, causing the bubble to move toward the region of lower surface tension, where it faces less opposing force. When the Marangoni force is generated by a laser beam’s temperature gradient, it becomes an exceptionally effective mechanism for the steady-state trapping and three-dimensional manipulation of bubbles, even with low optical power lasers. This force produces both longitudinal and transversal forces, resembling optical forces, creating a three-dimensional potential well capable of handling bubbles with radii of tens to hundreds of microns. This work provides guidance and demonstrates, both experimentally and theoretically, the step-by-step process of quasi-steady-state trapping and three-dimensional manipulation of bubbles through optothermal effects. The bubbles in question are tens of microns in size, significantly larger than those that optical tweezers can trap/manipulate. Furthermore, the study emphasizes the crucial role of the Marangoni force in this process, outlining its various advantages.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"54 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588082","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

Analysis of speckle-beacon size impact on wavefront sensing and closed-loop control in deep turbulence conditions 分析斑点信标尺寸对深湍流条件下波前传感和闭环控制的影响

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-09 DOI: 10.1088/2040-8986/ad5d04

Mikhail A Vorontsov, Svetlana L Lachinova, Ernst Polnau

引用次数: 0

All-dielectric metasurface for polarization-multiplexed single-pixel imaging 用于偏振多路复用单像素成像的全介质元表面

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-09 DOI: 10.1088/2040-8986/ad5d03

Pengsen Wang, Kai Guo, Zhongyi Guo

{"title":"All-dielectric metasurface for polarization-multiplexed single-pixel imaging","authors":"Pengsen Wang, Kai Guo, Zhongyi Guo","doi":"10.1088/2040-8986/ad5d03","DOIUrl":"https://doi.org/10.1088/2040-8986/ad5d03","url":null,"abstract":"Integration and miniaturization of multi-channel single-pixel imaging systems have become a developing trend. However, it is challenging to meet such development needs solely relying on traditional optical devices. One feasible solution is the utilization of metasurfaces with multiplexing functionality. Here, we propose and validate an all-dielectric, anisotropic metasurface that provides a random mask with polarization multiplexing for single pixel imaging. The design ensures each mask contains 50% target information, allowing adaptive correlated imaging of different targets without needing to redesign the masks. By optimizing the metasurface, we enhance computational efficiency by preventing correlation between different polarization channels and mask patterns. We also adjust the parameters of the compressed sensing algorithm to accommodate various sampling rates, ensuring high-quality image reconstruction. Additionally, the whole system is simulated by the angular spectrum transmission and compressed sensing reconstruction algorithm, providing image reconstruction results for metasurfaces of different sizes, demonstrating the feasibility of the proposed approach. It is noteworthy that the designed metasurface works for single-wavelength operation and could be extended to multispectral imaging by introducing achromatic metasurface technology. The proposed method could miniaturize the optical devices and reduce light loss.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"16 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141570181","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

On the orbit-induced spin density of tightly focused optical vortex beams: ellipticity and helicity 关于紧聚焦光涡旋束的轨道诱导自旋密度：椭圆度和螺旋度

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-09 DOI: 10.1088/2040-8986/ad5f40

Kayn A Forbes

引用次数: 0

In-plane radiation pattern generated by large particles in dielectric substrates 介质基板中的大颗粒产生的面内辐射模式

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-03 DOI: 10.1088/2040-8986/ad5c7d

Juan M Merlo and Madeleine H Carhart

引用次数: 0

Pressure-dependent bandgap characteristics in photonic crystals with sensing applications 光子晶体中与压力相关的带隙特性与传感应用

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-07-03 DOI: 10.1088/2040-8986/ad5b73

Varnam Sherawat, Renuka Bokolia and Ravindra Kumar Sinha

{"title":"Pressure-dependent bandgap characteristics in photonic crystals with sensing applications","authors":"Varnam Sherawat, Renuka Bokolia and Ravindra Kumar Sinha","doi":"10.1088/2040-8986/ad5b73","DOIUrl":"https://doi.org/10.1088/2040-8986/ad5b73","url":null,"abstract":"The present study elucidates a photonic crystal (PhC)-based pressure sensor exploiting the change in refractive index with pressure and the corresponding structural deformation of the dielectric material. The stress-sensitive refractive indices of the constituent materials of the PhC have been considered to study the effect of applied pressure on the photonic bandgap (PBG) characteristics of the structure. The designed pressure sensor, proposed using a two-dimensional hexagonal lattice arrangement of air holes in a dielectric slab, operates in the high-pressure range of 1–6 GPa. A comparative study of the PBG characteristics with the application of high pressure has been reported for three semiconducting materials—GaAs, Ge and Si, used for the dielectric slab in the proposed structure. GaAs is found to exhibit the highest sensitivity to pressure variations and shows more pronounced shifting of the midgap wavelength with pressure in comparison to Ge and Si. The largest PBG is seen in the Ge-based structure, closely followed by the GaAs and Si-based structures. The proposed structure is suitable for high-pressure sensing applications.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"47 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551133","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