David S. Simon, Christopher R. Schwarze, A. Ndao, Alexander V. Sergienko
{"title":"Exceptional points in SSH-like models with hopping amplitude gradient","authors":"David S. Simon, Christopher R. Schwarze, A. Ndao, Alexander V. Sergienko","doi":"10.1364/josab.530766","DOIUrl":"https://doi.org/10.1364/josab.530766","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648941","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}
J. Kodz, Kestutis Regelskis, N. Gavrilinas, Julijanas Zeludevivcius
{"title":"Non-reciprocal optical phase shifter based on the Sagnac effect and its implementation as an optical isolator","authors":"J. Kodz, Kestutis Regelskis, N. Gavrilinas, Julijanas Zeludevivcius","doi":"10.1364/josab.529235","DOIUrl":"https://doi.org/10.1364/josab.529235","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141652402","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}
Recently, the meta-surface (MS) has emerged as a promising alternative method for generating vortex waves. At the same time, MS also faces the problem of a narrow bandwidth; in order to obtain a broad bandwidth, the MS unit cell structure becomes more and more complex, which will bring many inconveniences to the preparation process of MS devices. Therefore, we want to design a simple MS unit cell with a multi-frequency selection. In this paper, based on the principle of geometric phase, we design a simple reflective MS unit cell based on a metal double-slit resonant ring. We elaborate on the resonance mechanism of the MS unit cell. Under the normal incidence of circularly polarized (CP) waves, the reflection coefficient of the same polarization was greater than 85%. By rotating the orientation angle of the resonator on the MS unit cell, the continuous 2π phase coverage was satisfied in the frequency range of 0.52–1.1 THz, and the relative bandwidth becomes 71.6%. Based on this, we construct a vortex generator by using a 15×15 MS unit array. The right-handed circularly polarized (RCP) waves and left-handed circularly polarized (LCP) wave are separately incident on MS with topological charges of l=+1,+2,+3 under multiple resonant frequencies. The generated RCP vortex wave has topological charges of l=−1,−2,−3 and the generated LCP vortex wave has topological charges of l=+1,+2,+3. The numerical simulation results demonstrate that our designed MS, capable of achieving multiple resonance outcomes, can effectively operate in a multi-broadband mode and produce a wide-band vortex beam. In addition, we also calculate the pattern purity. Through theoretical analysis and numerical simulation, we prove that our designed MS can generate a broadband vortex wave.
近来，元表面（MS）作为一种产生涡旋波的替代方法而崭露头角。与此同时，MS 也面临着带宽较窄的问题；为了获得较宽的带宽，MS 单元结构变得越来越复杂，这将给 MS 器件的制备过程带来诸多不便。因此，我们希望设计一种具有多频选择功能的简单 MS 单元。本文基于几何相位原理，设计了一种基于金属双缝谐振环的简单反射式 MS 单元池。我们详细阐述了 MS 单元池的共振机理。在圆偏振（CP）波的正常入射条件下，同一偏振的反射系数大于 85%。通过旋转 MS 单元上谐振器的定向角，在 0.52-1.1 THz 频率范围内实现了连续的 2π 相位覆盖，相对带宽达到 71.6%。在此基础上，我们利用 15×15 MS 单元阵列构建了一个涡旋发生器。在多个谐振频率下，右手圆极化（RCP）波和左手圆极化（LCP）波分别入射到拓扑电荷为 l=+1、+2、+3 的 MS 上。产生的 RCP 涡旋波的拓扑电荷为 l=-1、-2、-3，而产生的 LCP 涡旋波的拓扑电荷为 l=+1、+2、+3。数值模拟结果表明，我们设计的 MS 能够实现多重共振结果，可以有效地在多宽带模式下运行，并产生宽带涡旋波束。此外，我们还计算了图案纯度。通过理论分析和数值模拟，我们证明了所设计的 MS 能够产生宽带涡旋波。
{"title":"Broadband vortex beam generation by a reflective meta-surface based on a metal double-slit resonant ring","authors":"Xufeng Yuan, Chaoying Zhao","doi":"10.1364/josab.522517","DOIUrl":"https://doi.org/10.1364/josab.522517","url":null,"abstract":"Recently, the meta-surface (MS) has emerged as a promising alternative method for generating vortex waves. At the same time, MS also faces the problem of a narrow bandwidth; in order to obtain a broad bandwidth, the MS unit cell structure becomes more and more complex, which will bring many inconveniences to the preparation process of MS devices. Therefore, we want to design a simple MS unit cell with a multi-frequency selection. In this paper, based on the principle of geometric phase, we design a simple reflective MS unit cell based on a metal double-slit resonant ring. We elaborate on the resonance mechanism of the MS unit cell. Under the normal incidence of circularly polarized (CP) waves, the reflection coefficient of the same polarization was greater than 85%. By rotating the orientation angle of the resonator on the MS unit cell, the continuous 2<jats:italic>π</jats:italic> phase coverage was satisfied in the frequency range of 0.52–1.1 THz, and the relative bandwidth becomes 71.6%. Based on this, we construct a vortex generator by using a 15×15 MS unit array. The right-handed circularly polarized (RCP) waves and left-handed circularly polarized (LCP) wave are separately incident on MS with topological charges of <jats:italic>l</jats:italic>=+1,+2,+3 under multiple resonant frequencies. The generated RCP vortex wave has topological charges of <jats:italic>l</jats:italic>=−1,−2,−3 and the generated LCP vortex wave has topological charges of <jats:italic>l</jats:italic>=+1,+2,+3. The numerical simulation results demonstrate that our designed MS, capable of achieving multiple resonance outcomes, can effectively operate in a multi-broadband mode and produce a wide-band vortex beam. In addition, we also calculate the pattern purity. Through theoretical analysis and numerical simulation, we prove that our designed MS can generate a broadband vortex wave.","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141866884","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}
{"title":"20 JOSA B Emerging Researcher Best Paper Prize: editorial","authors":"Kurt Busch","doi":"10.1364/josab.536544","DOIUrl":"https://doi.org/10.1364/josab.536544","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141658671","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}
{"title":"Generation and control of optical rogue waves by super-Gaussian pulses with varying steepness","authors":"Lu Wan, Haozhe Li, Zhixiang Deng, Yanxia Gao, Dianyuan Fan, Lifu Zhang","doi":"10.1364/josab.527724","DOIUrl":"https://doi.org/10.1364/josab.527724","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664588","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}
D. Ryan Sheffield, Anthony Fiorito, Hengzhou Liu, Michael Crescimanno, Nathan J. Dawson
Iridophore networks in the skin of neon tetra fish are investigated for use as biologically sourced, tunable, Bragg reflector arrays. This paper reports on a method for immediate and fast post-processing of tissue to modify the structural color of iridophores found in the lateral color stripe. Conditions for fixation, as well as the environment post-fixation to improve longevity of the structural color, are also presented. Recent results from attempts to further increase the lifetime of post-mortem iridophore color through infiltration and embedding in low-acid glycol methacrylate are also discussed.
{"title":"Neon tetra fish (Paracheirodon innesi) as farm-to-optical-table Bragg reflectors","authors":"D. Ryan Sheffield, Anthony Fiorito, Hengzhou Liu, Michael Crescimanno, Nathan J. Dawson","doi":"10.1364/josab.532583","DOIUrl":"https://doi.org/10.1364/josab.532583","url":null,"abstract":"Iridophore networks in the skin of neon tetra fish are investigated for use as biologically sourced, tunable, Bragg reflector arrays. This paper reports on a method for immediate and fast post-processing of tissue to modify the structural color of iridophores found in the lateral color stripe. Conditions for fixation, as well as the environment post-fixation to improve longevity of the structural color, are also presented. Recent results from attempts to further increase the lifetime of post-mortem iridophore color through infiltration and embedding in low-acid glycol methacrylate are also discussed.","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141866937","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}
Jonathan Yang, Kaiyue Wang, Sachin Barthwal, Colin V. Parker
{"title":"Realization of a Single Beam, Detachable, Cascaded 2D Magneto-Optical Trap Based Modular Cesium Source","authors":"Jonathan Yang, Kaiyue Wang, Sachin Barthwal, Colin V. Parker","doi":"10.1364/josab.522695","DOIUrl":"https://doi.org/10.1364/josab.522695","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664826","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}
Takumi Kimura, Takanori Sato, M. Wada, T. Mori, T. Sakamoto, Ryota Imada, T. Matsui, Kazuhide Nakajima, Kunimasa Saitoh
{"title":"Design of Mode-Dependent-Loss Controller Using Long Period Fiber Grating with Coating Material for 2LP-Mode Transmission System","authors":"Takumi Kimura, Takanori Sato, M. Wada, T. Mori, T. Sakamoto, Ryota Imada, T. Matsui, Kazuhide Nakajima, Kunimasa Saitoh","doi":"10.1364/josab.526097","DOIUrl":"https://doi.org/10.1364/josab.526097","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664469","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}
{"title":"Mid-infrared supercontinuum generation in As2S3-circular photonic crystal fibers pumped by 4.5 μm and 6 μm femtosecond lasers","authors":"Ben Chu, B. T. Le Tran, Lanh Chu","doi":"10.1364/josab.534504","DOIUrl":"https://doi.org/10.1364/josab.534504","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141665866","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}
{"title":"Dimensional dependence of molecular-polariton mode number","authors":"Nathanial Lydick, Jiaqi Hu, Hui Deng","doi":"10.1364/josab.524026","DOIUrl":"https://doi.org/10.1364/josab.524026","url":null,"abstract":"","PeriodicalId":501621,"journal":{"name":"Journal of the Optical Society of America B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666459","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}
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