Optics Communications最新文献_第5页

A reconfigurable optical-assisted time-interleaved ADC based on optical delay chip

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-18 DOI: 10.1016/j.optcom.2025.131766

Bingchen Pan, Shilie Zheng, Yijie Ye, Xuan Liu, Xiaonan Hui, Xianmin Zhang

引用次数: 0

Polarized light navigation in cloudy conditions using deep learning

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-18 DOI: 10.1016/j.optcom.2025.131767

Xiaohui Dong, Yuan Li, Zhuo Liu, Fangchen Dong

{"title":"Polarized light navigation in cloudy conditions using deep learning","authors":"Xiaohui Dong, Yuan Li, Zhuo Liu, Fangchen Dong","doi":"10.1016/j.optcom.2025.131767","DOIUrl":"10.1016/j.optcom.2025.131767","url":null,"abstract":"<div><div>Polarized light navigation is a popular technique for practical navigation using polarized images of the sky. However, the interference with polarization information in cloudy weather can severely compromise the accuracy of polarization-based orientation. In order to solve this problem, a method based on the improved Unet deep learning model combined with threshold segmentation for cloud segmentation and restoration of the original sky image is proposed to achieve high-precision polarization navigation and orientation in a cloudy occlusion environment. The Dynamic Snake Convolution (DSC) which can dynamically adjust the convolution kernel, is employed in place of standard convolution in the Unet decoder. The Multi-scale Cross-axis Attention (MCA) is added in the skip connection part to strengthen the feature representation. The accuracy of the improved model can be increased to 91.94 %. The binary segmentation map predicted by the improved model is combined with the binary map of threshold segmentation to perform cloud restoration on the original sky image, and finally the restored sky image is used to solve the heading angle. Experimental results indicate that this approach effectively identifies occluded regions under cloud cover while also can improve the accuracy of the polarimetric navigation method. The root-mean-square error of the heading angle is reduced from 4.0437° to 0.8498° after de-clouding, and the navigation accuracy is improved by about 78.98 %.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131767"},"PeriodicalIF":2.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fast localization and single-pixel imaging of the moving object using time-division multiplexing

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-18 DOI: 10.1016/j.optcom.2025.131771

Zijun Guo , Wenwen Meng , Dongfeng Shi , Linbin Zha , Wei Yang , Jian Huang , Yafeng Chen , Yingjian Wang

{"title":"Fast localization and single-pixel imaging of the moving object using time-division multiplexing","authors":"Zijun Guo , Wenwen Meng , Dongfeng Shi , Linbin Zha , Wei Yang , Jian Huang , Yafeng Chen , Yingjian Wang","doi":"10.1016/j.optcom.2025.131771","DOIUrl":"10.1016/j.optcom.2025.131771","url":null,"abstract":"<div><div>When imaging moving objects, single-pixel imaging often suffers from motion blur. This paper presents a novel method for simultaneous high-speed localization and anti-motion blur imaging of fast-moving objects based on single-pixel imaging. The proposed approach leverages geometric moment patterns and Hadamard patterns alternately, encoding the object's positional and image information through time-division multiplexing. During the reconstruction process, the object's position is first extracted, followed by obtaining the image using a motion-compensated single-pixel reconstruction method. As a result, the method achieves both high-frame-rate localization and motion-blur-free imaging. Experimental results demonstrate that for an object moving at an angular velocity of up to 0.5 rad/s relative to the imaging system, the proposed method achieves a localization frequency of 5.55 kHz and progressively reconstructs a motion-blur-free image with a higher signal-to-noise ratio. This approach holds promising potential for applications in single-pixel imaging of fast-moving objects.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131771"},"PeriodicalIF":2.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Actively tunable multi-frequency narrowband terahertz absorber using graphene metamaterials

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-18 DOI: 10.1016/j.optcom.2025.131768

Zan Li , Qianju Song , Lianbao Jia , Zao Yi , Shubo Cheng , Junqiao Wang , Boxun Li

{"title":"Actively tunable multi-frequency narrowband terahertz absorber using graphene metamaterials","authors":"Zan Li , Qianju Song , Lianbao Jia , Zao Yi , Shubo Cheng , Junqiao Wang , Boxun Li","doi":"10.1016/j.optcom.2025.131768","DOIUrl":"10.1016/j.optcom.2025.131768","url":null,"abstract":"<div><div>This study presents a novel design for a multi-frequency narrowband terahertz absorber utilizing graphene metamaterials. Unlike other graphene-based terahertz absorbers, the proposed structure eliminates the need for graphene patterning, significantly simplifying the fabrication process and enhancing its feasibility for practical applications. The absorber consists of four layers: an Au substrate, a dielectric layer, a graphene layer, and a patterned Au absorption layer. The pattern of the metasurface absorption layer is composed of four rotationally symmetric rectangles and rings, which achieve high absorption performance while eliminating the need for graphene patterning. The simulation results indicate that when the terahertz wave strikes the absorber at a perpendicular angle and the graphene Fermi level is adjusted to 0.1 eV, the absorber achieves near-perfect absorption at five frequencies: 4.4362 THz, 6.4261 THz, 7.1191 THz, 9.1981 THz, and 9.604 THz, with a maximum absorption rate of 99.828 %. By determining the relative impedance of the absorber using the parameter inversion method through simulation, it is observed that the absorber follows the impedance matching theory. Moreover, through the study of the electric field distribution corresponding to the absorption peak, it is found that when the terahertz wave is incident on the absorber, a high absorption effect is produced due to the localized surface plasmon resonance (LSPR) between the Au layer and the graphene layer on the surface, LSPR technology has been widely utilized in applications such as sensors and absorbers. Furthermore, by adjusting the Fermi level of graphene and analyzing the absorption spectrum, it is demonstrated that the Fermi level enables active tunability of the absorber, highlighting its potential value in the field of terahertz smart devices.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131768"},"PeriodicalIF":2.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Prediction of humidity levels for maximum optical relative transmittance using modified heterodyne detection and GA-BP neural networks

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-18 DOI: 10.1016/j.optcom.2025.131773

Xinlei Qian , Ying Ji , Xingxing Ge , Yue Huang , Chongpeng Huang , Yong Kong

{"title":"Prediction of humidity levels for maximum optical relative transmittance using modified heterodyne detection and GA-BP neural networks","authors":"Xinlei Qian , Ying Ji , Xingxing Ge , Yue Huang , Chongpeng Huang , Yong Kong","doi":"10.1016/j.optcom.2025.131773","DOIUrl":"10.1016/j.optcom.2025.131773","url":null,"abstract":"<div><div>Humidity management is of great significance for optimizing the performance of all-solid-state optical systems, while the intricate interplay between humidity and various optical elements’ relative transmittance (RT) is characterized by a nonlinear relationship, complicating the measurement and calculation of optimal humidity levels necessary for achieving maximum RT. In this paper, we present a modified heterodyne detection method to quantitatively measure RT variations across diverse optical materials under humidity fluctuations. The acquired data are trained into a unified mapping model using a genetic algorithm-back propagation (GA-BP) neural network, enabling precise prediction of humidity levels required for maximum RT. Experimental results demonstrate that the GA-BP method achieve a remarkable correlation coefficient (R<sup>2</sup>) of 0.998 between predicted and actual values, and with the proposed model, the predicted optimal humidity levels for polarizers, conductive films, and windows are 44 %, 21 %, and 15 %, respectively, yielding RT values exceeding 99 %. These results outperform scenarios without prediction or using traditional BP methods. We believe that this research can offer novel insights for optimizing related optical systems to enhance output quality.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131773"},"PeriodicalIF":2.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 reflective terahertz-field projector using Vanadium dioxide Sierpinski metamaterial broadband absorber

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-17 DOI: 10.1016/j.optcom.2025.131770

B. Asrafali , Fahim Khan , Deepika Tyagi , M.S. Syam , M. Pavithra , N. Yogesh , Z. Ouyang

{"title":"Ultra-thin reflective terahertz-field projector using Vanadium dioxide Sierpinski metamaterial broadband absorber","authors":"B. Asrafali , Fahim Khan , Deepika Tyagi , M.S. Syam , M. Pavithra , N. Yogesh , Z. Ouyang","doi":"10.1016/j.optcom.2025.131770","DOIUrl":"10.1016/j.optcom.2025.131770","url":null,"abstract":"<div><div>Display and projector technologies are well-known in the optical domain but are largely unknown in the terahertz (THz) domain. This work demonstrates the ultrathin reflective THz-field projector using a Vanadium dioxide (VO<sub>2</sub>) based Metamaterial (MTM) near-perfect absorber. The inclusion of the Sierpinski pattern in the MTM design creates dipole, quadrupole, and higher-order electromagnetic modes due to the greater number of resonating sharp edges that are intrinsically present in the design resulting in the broadband absorptance of 99.37 %. The absorptance for TE and TM polarization was calculated and the broadband exists from 0° to 70° of the incident angle. Utilizing this, an equivalent eight-segment THz reflective field projector is proposed. All the English alphabets and the Arabian numerics were displayed using the tuning property of VO<sub>2</sub>, and the acronym ‘SZU’ was displayed to showcase the display effect without any disruption from the adjacent pixels. The proposed THz reflective field projector has the potential to serve the multidisciplinary domains of astrophysics, encrypted communication, THz holograms, and anti-counterfeiting measures.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131770"},"PeriodicalIF":2.2,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Optical design of a double-sided telecentric zoom system with large field of view

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-16 DOI: 10.1016/j.optcom.2025.131765

Youping Huang, Xiaogang Chen, Hao Zhang, Xiaoyan Li

{"title":"Optical design of a double-sided telecentric zoom system with large field of view","authors":"Youping Huang, Xiaogang Chen, Hao Zhang, Xiaoyan Li","doi":"10.1016/j.optcom.2025.131765","DOIUrl":"10.1016/j.optcom.2025.131765","url":null,"abstract":"<div><div>Double-sided telecentric zoom system (DTZS), characterized by low distortion and high detection accuracy, holds significant promise for applications in machine vision and medical diagnosis. However, the DTZS faces two main drawbacks: one is the lack of a suitable initial structure, and the other is the insufficient field of view (FOV) in existing optical systems. In this paper, the design of large FOV DTZS is taken as an example, and a design method suitable for large FOV zoom system is presented. In this method, the initial structure of the DTZS can be divided into a front fixed-focus system and a rear zoom system, which can be transformed into a general zoom system for design, and then the system is further optimized using ZEMAX. The optimization results show that the DTZS possesses a magnification range from −0.458 × to −0.11 × and a FOV for detection from 24 mm to 100 mm, which can continuous detection of both small and large objects while meeting the precision requirements for diverse objects. The system exhibits excellent imaging quality which controls the telecentricity of both sides within 0.8°, the distortion is trolled within 0.11 %, and the MTF of each zoom configuration is above 0.34 (at 80 lp/mm) throughout the entire FOV. Additionally, the CAM curve of DTZS is smooth without inflexion, and the tolerance values are loose. The DTZS is characterized by a compact structure, large FOV, low distortion, excellent image quality, making it a promising candidate for applications in fields such as industrial automation detection, machine vision.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131765"},"PeriodicalIF":2.2,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Optimized RbPbI3-Based perovskite solar cells with SnS2 ETL and MoO3 HTL achieving simulated PCE of 32.72%

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-15 DOI: 10.1016/j.optcom.2025.131761

Md. Ariful Islam Bhuiyan , Md. Shamim Reza , Avijit Ghosh , Hmoud Al-Dmour , Yedluri Anil Kumar , Muhammad Ihsan Ibn Rahim , Md. Aktarujjaman , Fahima Yeasmin , Hamad Al-Lohedan (.) , R. Jothi Ramalingam , Md. Selim Reza

{"title":"Optimized RbPbI3-Based perovskite solar cells with SnS2 ETL and MoO3 HTL achieving simulated PCE of 32.72%","authors":"Md. Ariful Islam Bhuiyan , Md. Shamim Reza , Avijit Ghosh , Hmoud Al-Dmour , Yedluri Anil Kumar , Muhammad Ihsan Ibn Rahim , Md. Aktarujjaman , Fahima Yeasmin , Hamad Al-Lohedan (.) , R. Jothi Ramalingam , Md. Selim Reza","doi":"10.1016/j.optcom.2025.131761","DOIUrl":"10.1016/j.optcom.2025.131761","url":null,"abstract":"<div><div>The pursuit of alternative absorber materials with higher structural and thermal stability has been fueled by the growing demand for high-efficiency and stable perovskite solar cells (PSCs). Using its improved durability and optoelectronic qualities, this work investigates RbPbI<sub>3</sub> as a possible substitute for conventional perovskites. Using SCAPS-1D to model an Ag/FTO/ETL/RbPbI<sub>3</sub>/Ni device structure, a power conversion efficiency (PCE) of 28.12 % was first obtained with SnS<sub>2</sub> ETL (electron transport layer). Then, hole transport layer (HTL) concept has been used to improve the performances more. The thickness, defect density, and doping concentration of ETL and HTL, and absorber were all methodically optimized to improve performance. This led to a markedly improved V<sub>OC</sub> of 1.22 V, PCE of 32.72 %, J<sub>SC</sub> of 32.21 mA/cm<sup>2</sup>, and FF of 83.27 % with MoO<sub>3</sub> HTL. The new results demonstrate that RbPbI<sub>3</sub> is a suitable substitute for long-term solar energy applications due to its improved stability, improved charge transport through SnS<sub>2</sub> and MoO<sub>3</sub>, and decreased recombination losses. This research will have an impact on the development of high-performance, stable, and eco-friendly photovoltaic technologies in the future by directing the experimental validation and manufacture of RbPbI<sub>3</sub>-based PSCs.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131761"},"PeriodicalIF":2.2,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Pinching operators for approximating multiphoton entangled states

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-15 DOI: 10.1016/j.optcom.2025.131726

Skylar R. Turner , Brian R. La Cour

{"title":"Pinching operators for approximating multiphoton entangled states","authors":"Skylar R. Turner , Brian R. La Cour","doi":"10.1016/j.optcom.2025.131726","DOIUrl":"10.1016/j.optcom.2025.131726","url":null,"abstract":"<div><div>We introduce the pinching operator, which extends the theory of squeezing operators to non-Gaussian operators, and use it to approximate <span><math><mi>n</mi></math></span>-photon entangled states using a pinched vacuum state and pinching tensor of rank <span><math><mi>n</mi></math></span>. A simple recursion relation is derived for generating the Bogoliubov transformed creation and annihilation operators, which may be used to express the pinched state as a statistically equivalent set of nonlinearly transformed complex Gaussian random variables. Using this representation, we compare low-order approximations of the pinched state to entangled multiphoton Fock states, such as Greenberger–Horne–Zeilinger (GHZ) and W states. Using post-selection and a threshold detector model to represent non-Gaussian measurements, we find that this model is capable of producing states with a fidelity comparable to that of experimentally prepared multiphoton entangled states. Our results show that it is possible to classically simulate large multiphoton entangled states to high fidelity within the constraints of finite detection efficiency.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131726"},"PeriodicalIF":2.2,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Holographic multi-focus multifunctional metalens realises particle capture, rotation and sorting

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-03-15 DOI: 10.1016/j.optcom.2025.131718

Yuehua Deng , Xiaoyan Huang , Shengru Zhou , Shaoqi Li , Yijiao Zhu , Yang Yu , Junbo Yang

{"title":"Holographic multi-focus multifunctional metalens realises particle capture, rotation and sorting","authors":"Yuehua Deng , Xiaoyan Huang , Shengru Zhou , Shaoqi Li , Yijiao Zhu , Yang Yu , Junbo Yang","doi":"10.1016/j.optcom.2025.131718","DOIUrl":"10.1016/j.optcom.2025.131718","url":null,"abstract":"<div><div>Optical tweezers, with their excellent manipulation precision, have become a vital tool for exploring the microscopic world and have significantly advanced research in physical and biological sciences. However, enhancing system integration and multifunctionality remains a critical challenge. In this study, we adopt a shared aperture approach to design and construct a polarisation-insensitive multifunctional optical tweezer system with a high numerical aperture. This system can capture, rotate, and sort various nanospheres in parallel. Through theoretical analyses and numerical simulations, we propose an innovative method to coaxially focus a Gaussian spot with a vortex spot, generating a unique light field for conducting photodynamic analyses of particles. Furthermore, our method enables the generation of numerous arbitrary-state light fields in free space with uniformly normalised electric field strengths. These foci ensure uniform light field distribution and consistent particle capture, enhancing the precision of optical tweezers in biophysics, materials science, and nanotechnology. This work also provides novel theoretical insights for microscale precision manipulation and analysis.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"583 ","pages":"Article 131718"},"PeriodicalIF":2.2,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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