Journal of Optics最新文献_第8页

Creation and manipulation of optical Meron topologies in tightly focused electromagnetic field 在紧密聚焦的电磁场中创建和操纵光学梅隆拓扑结构

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-04-16 DOI: 10.1088/2040-8986/ad3b19

Haomai Lei, Bin Luo, Jianfei Hu, Jiming Wang, Tong Wu, Youwen Liu

引用次数: 0

Research on the grouped orthonormalization method in ghost imaging 鬼影成像中的分组正则化方法研究

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-04-15 DOI: 10.1088/2040-8986/ad3b18

Longfei Yin, Tiantian Liu, Xinlong Mai, Shilun Sun, Pengqi Yin, Guohua Wu, Bin Luo

{"title":"Research on the grouped orthonormalization method in ghost imaging","authors":"Longfei Yin, Tiantian Liu, Xinlong Mai, Shilun Sun, Pengqi Yin, Guohua Wu, Bin Luo","doi":"10.1088/2040-8986/ad3b18","DOIUrl":"https://doi.org/10.1088/2040-8986/ad3b18","url":null,"abstract":"Ghost imaging (GI) has found application across diverse fields owing to its distinctive benefits. When employing the rotating ground-glass scheme and utilizing second-order correlation for image reconstruction, the efficiency of imaging is hindered by the multiple sampling of reference patterns. To address this, the orthonormalization method has been employed to enhance image quality and reduce the required number of measurements. Despite its effectiveness, the original orthonormalization method is prone to accumulating imaging noise and errors as the number of measurements increases, leading to a significant degradation in image quality. To overcome this limitation, this paper introduces the grouped orthonormalization method (GO-GI) as an extension of the orthonormalization technique. By adjusting the ‘group size’, this method enables control over the accumulation of errors, resulting in an improvement in image quality. The evaluation of image quality in terms of Contrast-to-Noise demonstrates the significant advantages of the GO-GI method in both simulation and experimental results. This study establishes the GO-GI method as a simple yet practical approach in the realm of GI.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"18 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140608948","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

Scattering matrix for chiral harmonic generation and frequency mixing in nonlinear metasurfaces 非线性元表面中手性谐波产生和频率混合的散射矩阵

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-04-11 DOI: 10.1088/2040-8986/ad3a78

Kirill Koshelev, Ivan Toftul, Yongsop Hwang, Yuri Kivshar

{"title":"Scattering matrix for chiral harmonic generation and frequency mixing in nonlinear metasurfaces","authors":"Kirill Koshelev, Ivan Toftul, Yongsop Hwang, Yuri Kivshar","doi":"10.1088/2040-8986/ad3a78","DOIUrl":"https://doi.org/10.1088/2040-8986/ad3a78","url":null,"abstract":"We generalize the concept of optical scattering matrix (<italic toggle=\"yes\">S</italic>-matrix) to characterize harmonic generation and frequency mixing in planar metasurfaces in the limit of undepleted pump approximation. We show that the symmetry properties of such nonlinear <italic toggle=\"yes\">S</italic>-matrix are determined by the metasurface symmetries at the macroscopic and microscopic scale. We demonstrate that for description of degenerate frequency mixing processes such as optical harmonic generation, the multidimensional <italic toggle=\"yes\">S</italic>-matrix can be replaced with a reduced two-dimensional <italic toggle=\"yes\">S</italic>-matrix. We show that for metasurfaces possessing specific point group symmetries, the selection rules determining the transformation of the reduced nonlinear <italic toggle=\"yes\">S</italic>-matrix are simplified substantially and can be expressed in a compact form. We apply the developed approach to analyze <italic toggle=\"yes\">chiral harmonic generation</italic> in nonlinear metasurfaces with various symmetries including rotational, inversion, in-plane mirror, and out-of-plane mirror symmetries. For each of those symmetries, we confirm the results of the developed analysis by full-wave numerical calculations. We believe our results provide a new paradigm for engineering nonlinear optical properties of metasurfaces which may find applications in active and nonlinear optics, biosensing, and quantum information processing.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"36 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140614321","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

Narrowband Mg/SiC multilayer mirror working as high-harmonic selector at 30.4 nm wavelength 窄带 Mg/SiC 多层反射镜可用作 30.4 纳米波长的高次谐波选择器

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-04-11 DOI: 10.1088/2040-8986/ad3a79

Zhe Zhang, Runze Qi, Qiushi Huang, Yufei Feng, Zhong Zhang, Tonglin Huo, Hongjun Zhou, Zhanshan Wang

引用次数: 0

Computation cost reduction in 3D shape optimization of nanophotonic components 降低纳米光子元件三维形状优化的计算成本

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-04-11 DOI: 10.1088/2040-8986/ad3a76

Md Mahadi Masnad, Nishat Salsabil, Dan-Xia Xu, Odile Liboiron-Ladouceur, Yuri Grinberg

{"title":"Computation cost reduction in 3D shape optimization of nanophotonic components","authors":"Md Mahadi Masnad, Nishat Salsabil, Dan-Xia Xu, Odile Liboiron-Ladouceur, Yuri Grinberg","doi":"10.1088/2040-8986/ad3a76","DOIUrl":"https://doi.org/10.1088/2040-8986/ad3a76","url":null,"abstract":"Inverse design methodologies effectively optimize many design parameters of a photonic device with respect to a primary objective, uncovering locally optimal designs in a typically non-convex parameter space. Often, a variety of secondary objectives (performance metrics) also need to be considered before fabrication takes place. Hence, a large collection of optimized designs is useful, as their performance on secondary objectives often varies. For certain classes of components such as shape-optimized devices, the most efficient optimization approach is to begin with 2D optimization from random parameter initialization and then follow up with 3D re-optimization. Nevertheless, the latter stage is substantially time- and resource-intensive. Thus, obtaining a desired collection of optimized designs through repeated 3D optimizations is a computational challenge. To address this issue, a machine learning-based regression model is proposed to reduce the computation cost involved in the 3D optimization stage. The regression model correlates the 2D and 3D optimized structural parameters based on a small dataset. Using the predicted design parameters from this model as the initial condition for 3D optimization, the same optima are reached faster. The effectiveness of this approach is demonstrated in the shape optimization-based inverse design of TE0-TE1 mode converters, an important component in mode-division multiplexing applications. The final optimized designs are identical in both approaches, but leveraging a machine learning-based regression model offers a 35% reduction in computation load for the 3D optimization step. The approach provides a more effective means for sampling larger numbers of 3D optimized designs.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"5 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140614324","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

Multifunctional beam modulation based on gratings combined with additive metasurfaces 基于光栅与添加式元表面相结合的多功能光束调制技术

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-04-03 DOI: 10.1088/2040-8986/ad31cb

Cong Chen, Peng Gao, Yaowei Dai, Xiamin Tong, Jingyuan Gao, Hai Liu

{"title":"Multifunctional beam modulation based on gratings combined with additive metasurfaces","authors":"Cong Chen, Peng Gao, Yaowei Dai, Xiamin Tong, Jingyuan Gao, Hai Liu","doi":"10.1088/2040-8986/ad31cb","DOIUrl":"https://doi.org/10.1088/2040-8986/ad31cb","url":null,"abstract":"A design scheme combining grating and element additive metasurface is proposed in this paper. Multi-dimensional joint control of the phase, amplitude, angle and polarization and multi-functional integrated metasurface applications were realized by using the inherent characteristics of the light wave properties (polarization and wavelength). Firstly, suitable structural parameters are obtained based on the reflection response of the unit structure, and a 2-bit encoded metasurface array is constructed by utilizing the combinatorial operation between the unit structure. Combined with the polarization selectivity of the lower grating, the dual-function integration of asymmetric transmission (the contrast ratio is 98%) and abnormal reflections (operating bandwidth is 300 nm) was realized. Next, two new half-wave plates were obtained by addition and rotating the elemental structure, and the polarization conversion efficiency of 95%–97% was achieved thanks to the Fabry–Perot cavity formed by the upper metasurface and lower grating. Finally, encoded metasurface based on the geometric phase principle to achieve 300 nm bandwidth cross-polarized wave deflection characteristics with polarization conversion efficiency close to 100%. Our work combines grating structures with element additive metasurfaces, which solves the problem that element structure needs to be redesigned with the change of function, and also paves the way for the application of multifunctional integrated metasurfaces in optical sensing, optical imaging and other fields.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"34 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569153","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

Ultra-thin water-based metasurface with dual-broadband perfect absorption 具有双宽带完美吸收功能的超薄水基超表面

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-03-14 DOI: 10.1088/2040-8986/ad2d36

Ting Chen, Zhaoyang Shen, Han Liu

{"title":"Ultra-thin water-based metasurface with dual-broadband perfect absorption","authors":"Ting Chen, Zhaoyang Shen, Han Liu","doi":"10.1088/2040-8986/ad2d36","DOIUrl":"https://doi.org/10.1088/2040-8986/ad2d36","url":null,"abstract":"The rapid development of the 5 G technology can be attributed to its outstanding penetration in the low frequency bands ranging from 600 MHz to 6 GHz, particularly in specific frequency ranges like 700 MHz, 2.3 GHz, and 3.5 GHz. Simultaneously, the technology excels in the millimeter-wave spectrum, spanning from 24 GHz to 52 GHz, notably in bands such as 24.25–27.5 GHz and 37–40 GHz, showcasing impressive capabilities for high-speed data transmission. Nevertheless, these signals frequently encounter electromagnetic interference from electronic equipment in practical applications, which compromise the quality of communication. To address these issues, this paper presents the design, fabrication, and measure of a dual-broadband ultra-thin water-based metasurface absorber (WBMA). The unit cell is composed of a 4 mm thick photoresist shell encasing a water layer and metal plate, and features an irregular octagonal prism and a rectangular annulus cavity within the water layer. Simulation and experimental outcomes indicate that the proposed metasurface achieves near-perfect absorption at frequencies from 4.2 GHz to 4.8 GHz and from 23.6 GHz to 51.1 GHz in the transverse electric mode. Additionally, the proposed metasurface exhibits more than 90% absorption in the transverse magnetic mode for frequency ranges from 4.3 GHz to 4.9 GHz and from 23.2 GHz to 50.8 GHz. The designed water-based metasurface also exhibits features of polarization insensitivity and capability to handle wide-angle incidence. Analysis of the electric and magnetic field distribution within the metasurface suggests that the absorption mechanism is driven by strong magnetic resonance within the water layer’s structure. Furthermore, the effective impedance of the metamaterial absorber is explored. Given the unique absorption frequency bands, the proposed WBMA has potential applications in the realm of 5G communication.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"29 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140313730","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

Effect of water salinity on the focal tuning of an injected liquid lens used to modify the z-scan method 水盐度对用于修改 Z 扫描方法的注入式液体透镜焦点调整的影响

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-03-13 DOI: 10.1088/2040-8986/ad2edb

Yeganeh Shahsavand, Safoura Karimarji, Alireza Khorsandi

{"title":"Effect of water salinity on the focal tuning of an injected liquid lens used to modify the z-scan method","authors":"Yeganeh Shahsavand, Safoura Karimarji, Alireza Khorsandi","doi":"10.1088/2040-8986/ad2edb","DOIUrl":"https://doi.org/10.1088/2040-8986/ad2edb","url":null,"abstract":"A water-injected liquid lens is fabricated to tune its focal length using the change in water salinity. It is found that when the salinity of water is changed from zero to 34.25%, the focal length can be changed by about 12.6 mm from 73.7 mm to 86.3 mm. A focal length resolution of approximately 0.75 × 10−2 mm and high temporal stability over a long period have been achieved for the lens foci. This lens is then used to modify the <italic toggle=\"yes\">z</italic>-scan technique where the lens and the sample both remain fixed without displacement. The performance of the fabricated lens is evaluated by nonlinear refractive index measurement of a sample containing 10.82-pH-synthesized Silver nanoparticles suspended in water with 15 mM of concentration. For verification of the results, a nonlinear refractive index of (−10.6 ± 1.0) × 10−7 cm2 W−1 is firstly measured for the sample using a classical <italic toggle=\"yes\">z</italic>-scan benefiting from a conventional focal-fixed lens. Interestingly, we found out that when the fabricated lens is replaced in the modified <italic toggle=\"yes\">z</italic>-scan, the nonlinear refractive index of about (−8.1 ± 0.2) × 10−7 cm2 W−1 can be measured, indicating a similarity in the order and small difference in the coefficient compared to the classical <italic toggle=\"yes\">z</italic>-scan. This outcome highlights the potential capability and simplicity of the fabricated lens in the modification of the classical <italic toggle=\"yes\">z</italic>-scan technique.","PeriodicalId":16775,"journal":{"name":"Journal of Optics","volume":"44 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140313731","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-shot approach for polarization retrieval through a scattering medium 通过散射介质进行偏振检索的双镜头方法

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-03-12 DOI: 10.1088/2040-8986/ad2ed9

Abhijit Roy, Reajmina Parvin, Ankita Karmakar, Abhishek Mandal, Rakesh Kumar Singh, Maruthi M Brundavanam

引用次数: 0

Vortex plate retarder-based approach for the generation of sub-20 fs light pulses carrying orbital angular momentum 基于涡流板缓速器的方法，用于产生携带轨道角动量的 20 fs 以下光脉冲

IF 2.1 4区物理与天体物理

Journal of Optics Pub Date : 2024-03-12 DOI: 10.1088/2040-8986/ad2e1f

Tlek Tapani, Haifeng Lin, Aitor De Andres, Spencer W Jolly, Hinduja Bhuvanendran, Nicolò Maccaferri

引用次数: 0