Optics Communications最新文献

{"title":"A comprehensive optimization framework for indoor laser-based optical wireless communication using gimbal-steered transmitters","authors":"Oğuzhan Başer ,&nbsp;Mehmet Ali Küçük ,&nbsp;Kadir Türk","doi":"10.1016/j.optcom.2026.132985","DOIUrl":"10.1016/j.optcom.2026.132985","url":null,"abstract":"<div><div>The growing demand for high-speed wireless communication, driven by data-intensive applications such as high-definition video streaming and augmented reality, has highlighted the limitations of the Radio Frequency (RF) spectrum. Optical Wireless Communication (OWC) has emerged as a promising complementary technology, offering wide bandwidth, license-free operation, high security, and immunity to electromagnetic interference. Among OWC transmitters, Laser Diodes (LDs) provide high modulation bandwidth and narrow divergence angles, enabling data rates of several tens of gigabits per second. However, the narrow beam of LDs requires precise Line-of-Sight (LoS) alignment, making beam steering essential. This study focuses on optimizing the positioning and orientation of gimbal- or galvo-based LD transmitters in indoor OWC systems to minimize outage probability under LoS constraints and physical obstructions. An outage probability model considering room geometry and device field-of-view angles is developed and analyzed for three scenarios within a 7 × 5 m room: an empty environment, a room with a 1 × 1 m column, and a user-occupancy-aware environment. The complex optimization problem is solved using multiple meta-heuristic algorithms, including Particle Swarm Optimization (PSO), L-SHADE, and Stochastic Fractal Search with Fitness-Distance Balance (FDB-SFS). The obtained results are subsequently validated through grid search approach. The proposed approach achieves significant outage reduction, demonstrating that incorporating obstacle and user-distribution information enables efficient coverage with fewer terminals, reaching outage probabilities as low as 0.4%.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132985"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172441","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}

{"title":"Dynamically tunable SWIR thermal emitter based on epsilon-near-zero materials-integrated plasmonic metasurface","authors":"Xiujuan Zou ,&nbsp;Peng Zhou ,&nbsp;Lei Chen ,&nbsp;Ruozhang Xing ,&nbsp;Wei Zhou ,&nbsp;Jing Chen","doi":"10.1016/j.optcom.2026.133013","DOIUrl":"10.1016/j.optcom.2026.133013","url":null,"abstract":"<div><div>Electrically driven short-wave infrared (SWIR) thermal emitters with dynamic tunability are highly desirable for advanced applications in spectroscopy, sensing, and communications, yet they remain challenging to realize. Here, we propose and numerically demonstrate a dynamically tunable thermal emitter based on an epsilon-near-zero (ENZ) material-integrated plasmonic metasurface. By incorporating an ultra-thin indium tin oxide (ITO) film into a metal-insulator-metal metastructure, we achieve significant modulation of absorption within the SWIR band. Under an applied bias of 3.5 V, the carrier density in the ITO layer is electrically tuned, shifting its permittivity to the ENZ regime and enabling a remarkable transition of the device from a highly reflective state to a broadband, strongly absorbing one. The structure also exhibits desirable features such as thermal stability, polarization insensitivity, and wide-angle emission stability. This work highlights the potential of ENZ-based active metasurfaces as integrated, spectrally selective, and electrically switchable thermal emitters, paving the way for intelligent infrared photonic systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 133013"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172478","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}

{"title":"Temperature and strain sensor with ultra-high sensitivity based on the secondary Vernier effect","authors":"Xiaoxiang Liu ,&nbsp;Qianhao Xia ,&nbsp;Wenlong Sun ,&nbsp;Cui Liang ,&nbsp;Yilan Zhou ,&nbsp;Tengchao Huang","doi":"10.1016/j.optcom.2026.133006","DOIUrl":"10.1016/j.optcom.2026.133006","url":null,"abstract":"<div><div>An ultra-high sensitivity temperature-strain dual-parametric fiber optic sensor based on the secondary Vernier effect is proposed. The device is designed as a Mach-Zehnder interferometer (MZI) that incorporates a Solc–Sagnac interferometer (SSI) and a Sagnac interferometer (SI) in a parallel configuration. Theoretical analysis and simulation results demonstrate that when two thin polarization-maintaining fiber (TPMF) segments of unequal length are spliced with a 90° angle between their fast axes in an SSI, a primary Vernier effect could be induced. In the primary Vernier effect, the transmission spectrum contains only the envelope spectrum, with the fine spectrum components suppressed. The free spectral range (FSR) of the envelope spectrum is determined by the relative length difference of the two TPMF segments. By matching the FSR of the SI based on TPMF with that of the SSI, a secondary Vernier effect is induced, leading to a second amplification of sensitivity. The sensitivities of the single SI and the SSI to temperature and strain were examined individually in the experiments. The parameters of the TPMF employed in the proposed sensor were optimized to maximize sensitivity. According to the experimental results, the measured temperature sensitivity improved from −1.40 nm/°C in the single SI to −3.51 nm/°C with the primary Vernier effect, and further to −61.89 nm/°C with the secondary Vernier effect. The measured strain sensitivity improved from 18.3 pm/με in the single SI to 45.6 pm/με with the primary Vernier effect, and further to 808.7 pm/με with the secondary Vernier effect, achieving a 44 times sensitivity amplification. Additionally, the results showed that the proposed sensor demonstrates remarkable repeatability and stability, showing promising application prospects in temperature and strain detection.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 133006"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172440","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}

{"title":"Analysis of transmission jitter in amplitude-type optically addressed spatial light modulators","authors":"YanTao Song ,&nbsp;Wei Fan ,&nbsp;DaJie Huang ,&nbsp;ZiMu Li ,&nbsp;He Cheng ,&nbsp;Meng Teng","doi":"10.1016/j.optcom.2026.132980","DOIUrl":"10.1016/j.optcom.2026.132980","url":null,"abstract":"<div><div>As a key optical-field modulation component in high-power laser systems, amplitude-type optically addressed spatial light modulators (OASLMs) play a critical role in determining the overall system performance and reliability. In this study, we systematically investigate the stability characteristics and jitter suppression mechanisms of OASLMs using numerical simulations and experiments. The results reveal that although different models of electrically addressed liquid crystal on silicon (LCOS) modulators exhibit significant variations in jitter—reaching up to 16.71%—the jitter of the readout beam can be effectively suppressed to the ∼2% level, reaching a minimum of 1.86–2.00% across the three cases in the saturation regime, after modulation by the OASLM. Furthermore, the device demonstrates highly consistent and robust stability in the saturation regime. An analysis based on the addressing-light modulation chain indicates that the LCOS intensity flicker (which varies with grayscale and is predominantly systematic) is strongly suppressed by the cascaded temporal low-pass response of the BSO–LC stack; moreover, electro-optic saturation of the liquid-crystal layer in the high-transmittance regime further reduces the sensitivity of the readout to residual input fluctuations.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132980"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172469","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}

{"title":"An electrochromic dual-layer borophene nanogratings plasmonic structure color system with excellent color gamut and high brightness","authors":"Yizhao Pan,&nbsp;Fang Chen,&nbsp;Wenxing Yang","doi":"10.1016/j.optcom.2026.132997","DOIUrl":"10.1016/j.optcom.2026.132997","url":null,"abstract":"<div><div>The coloration performance of conventional plasmonic structural color systems has been constrained by the high intrinsic loss of bulk metallic materials. In contrast, borophene, an emerging two-dimensional (2D) material, has shown promise as a new candidate for structural color applications due to its low-loss characteristics in the visible regime. This research investigates the color performance of a structural color system based on dual-layer borophene nanogratings (BGs), in which color output can be electrically tuned via bias voltage. The resulting colors achieve a coverage of approximately 200 % of the sRGB gamut defined in CIE 1931. Under fixed structural parameters, the maximum color gamut area reaches 170 % of sRGB and 126 % of Adobe RGB. The system supports a maximum resolution of 10⁶ dots per inch (dpi). Moreover, the reflectance remains consistently high (<span><math><mrow><mo>≥</mo><mn>90</mn><mspace></mspace><mo>%</mo></mrow></math></span>)under large incident angles (<span><math><mrow><mo>≤</mo><msup><mn>70</mn><mo>∘</mo></msup></mrow></math></span>), maintaining bright color appearance. Polarization-dependent responses occur periodically, suggesting potential applications in color cryptography. The system also exhibits excellent robustness regarding the relaxation time of borophene. This work establishes a theoretical foundation for the design of high-resolution electrochromic encryption systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132997"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172476","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}

{"title":"Effect of AlGaN insertion layer in barriers on the optoelectronic characteristics of red light-emitting InGaN/GaN multi-quantum wells","authors":"Wei Liu,&nbsp;Chengrui Yan,&nbsp;Di Wang,&nbsp;Zeyu Liu,&nbsp;Bohan Shi,&nbsp;Runzhi Wang,&nbsp;Yujia Liu","doi":"10.1016/j.optcom.2026.132979","DOIUrl":"10.1016/j.optcom.2026.132979","url":null,"abstract":"<div><div>In this study, the optoelectronic characteristics of red light-emitting InGaN/GaN multiple quantum wells (MQWs) with an AlGaN layer inserted into a GaN barrier are investigated numerically. It is demonstrated that the polarization effect in InGaN QWs can be enhanced due to inserted AlGaN layer in barriers, leading to a redshift of the luminescence peak wavelength from 631.8 nm to 640.6 nm. Furthermore, compared to the traditional InGaN/GaN MQW structure, the utility of barriers with an AlGaN insertion layer can improve the uniformity of carrier distribution and increase the carrier concentration in the MQW active region by more than 35%, resulting in the enhancement of luminescence intensity by 10%. Especially, for the MQW sample where the Al content in the AlGaN insertion layer increases along the epitaxial growth direction, the luminescence intensity is the highest and the peak wavelength is the largest.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132979"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172482","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}

{"title":"Breaking reciprocity via beam shifts in Weyl Semimetal Interfaces with nonreciprocal Goos-Hänchen amplification","authors":"Yuliang Zhi ,&nbsp;Xin Cui ,&nbsp;Fenglin Xian ,&nbsp;Shixin Pei ,&nbsp;Gaige Zheng","doi":"10.1016/j.optcom.2026.133002","DOIUrl":"10.1016/j.optcom.2026.133002","url":null,"abstract":"<div><div>We propose a planar, prism-coupled Weyl-semimetal (WSM) interface that enables nonreciprocal Goos–Hänchen (GH) amplification via direction-dependent reflection-phase winding. The WSM/air/WSM stack supports narrow angular resonances with abrupt phase wraps in the TM reflection coefficient, which convert into giant lateral beam displacements for opposite in-plane propagation directions. For representative mid-infrared operation, we obtain peak normalized shifts up to <span><math><mrow><mrow><mo>|</mo><mi>G</mi><mo>|</mo></mrow><mo>/</mo><mi>λ</mi><mo>=</mo><mn>7</mn><mo>.</mo><mn>5</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>, with repeated polarity switching near resonance. A pronounced nonreciprocal response is observed by selecting an operating angle at which one direction is resonant while the counter-propagating direction is off-resonant, yielding a displacement contrast exceeding <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span> within a sub-<span><math><mrow><mn>0</mn><mo>.</mo><mn>1</mn><mo>°</mo></mrow></math></span> angular window. The effect is broadly reconfigurable: tuning the wavelength from <span><math><mrow><mi>λ</mi><mo>=</mo><mn>12</mn></mrow></math></span> to <span><math><mrow><mn>17</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> relocates the giant-shift resonances across <span><math><mrow><mi>θ</mi><mo>=</mo><mn>10</mn></mrow></math></span>°–17°, varying the air-gap thickness from <span><math><mrow><mi>d</mi><mo>=</mo><mn>7</mn></mrow></math></span> to <span><math><mrow><mn>13</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> reshapes the coupling linewidths and shifts the extrema by several degrees, and rotating the azimuthal angle from <span><math><mrow><mi>φ</mi><mo>=</mo><mn>45</mn><mo>°</mo></mrow></math></span> to <span><math><mrow><mn>180</mn><mo>°</mo></mrow></math></span> reorients the in-plane momentum <span><math><msub><mrow><mi>k</mi></mrow><mrow><mo>∥</mo></mrow></msub></math></span> relative to the WSM gyrotropy axis, enabling controllable direction selectivity and sign reversal. These results establish WSM interfaces as a compact, lithography-free platform for displacement-based nonreciprocal beam steering, isolation-like discrimination, and high-contrast sensing in the mid-infrared.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 133002"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172439","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}

{"title":"Anisotropic variation in chiroptical response of plasmonic nanostructure in in-plane and out-of-plane magnetic fields","authors":"Muhammad Ikram ,&nbsp;Shaohua Tao ,&nbsp;Muhammad Akram","doi":"10.1016/j.optcom.2026.132998","DOIUrl":"10.1016/j.optcom.2026.132998","url":null,"abstract":"<div><div>Active control of chiroptical response in plasmonic systems is pivotal for next-generation optical isolators, chiroptical sensors and magnetically reconfigurable meta-surfaces, yet simultaneous electrical and magnetic tunability with sub-degree angular resolution remains elusive. Here we demonstrate giant, angle-resolved magnetic field assisted CD modulation in an epsilon-shaped achiral plasmonic nanoantenna evaporated onto magnetically anisotropic Ce:YIG. Under oblique circularly-polarized excitation, the structure exhibits extrinsic chirality which can be modulated on demand by an in-plane magnetic field of only a few mT. A rigorous coupled-wave analysis reveals that the CD amplitude increases monotonically with incidence angle up to 45°. A mechanism elucidating extrinsic CD due to oblique incidence is established. Notably, due to magnetic anisotropy of Ce:YIG, CD modulation with in-plane magnetic field surpasses that with out-of-plane magnetic field. The calculated in-plane magnetic sensitivity is about 58 times larger than its out-of-plane counterpart. The proposed magnetoplasmonic system is CMOS-compatible, operates at room temperature and requires &lt;1 mW optical power, offering a scalable platform for atto-molar enantiomer detection, on-chip Faraday isolators and magnetically addressable chiral photonic circuits and sensors.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132998"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172470","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}

{"title":"Scattering imaging beyond the optical memory effect using deep learning model trained on physically inspired synthetic data","authors":"Jianan Fu ,&nbsp;Ziyue Ping ,&nbsp;Guannan He ,&nbsp;Zhi Luo ,&nbsp;Xia Wu ,&nbsp;Bo Huang","doi":"10.1016/j.optcom.2026.132993","DOIUrl":"10.1016/j.optcom.2026.132993","url":null,"abstract":"<div><div>In the field of imaging through scattering media, methods based on the optical memory effect (OME) are non-invasive and easy to implement but are limited by a narrow field of view. End-to-end deep learning (DL) approaches achieve superior reconstruction performance through powerful feature extraction capabilities; however, their dependence on large-scale training datasets restricts practical applicability. In this work, we incorporate the OME principle into the data synthesis process and train a DL–based scattering imaging model using the resulting physically inspired synthetic data. Although synthetic data alone is typically insufficient to represent the true scattering process, a suitably designed DL model can learn and compensate for these discrepancies, thereby enabling scattering imaging beyond the OME range. Our approach successfully reconstructs targets extending to more than twice the OME limit. Moreover, this method significantly reduces data acquisition costs and experimental complexity, providing a promising pathway for integrating physical priors with DL in scattering imaging.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132993"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172475","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}

{"title":"A novel cross-layer chaotic encryption and reversible hiding scheme for 3D information security","authors":"Wei Zhang ,&nbsp;Danying Song ,&nbsp;Xiting Wang ,&nbsp;Nana Yu ,&nbsp;Xiaolei Wang ,&nbsp;Sixing Xi","doi":"10.1016/j.optcom.2026.132967","DOIUrl":"10.1016/j.optcom.2026.132967","url":null,"abstract":"<div><div>This paper proposes a novel cross-layer chaotic encryption and reversible hiding scheme to address the security requirements of three-dimensional (3D) information. The scheme combines a layer-oriented iterative angular spectrum method with chaotic keys and high-complexity chaotic sequences generated by a five-dimensional Hamiltonian conservative chaotic system (FHCCS) to process 3D information. It disrupts the spatial correlation of 3D information through cross-layer scrambling and diffusion encryption. Subsequently, the encrypted information is losslessly embedded into a color carrier image using an improved reversible data hiding scheme in encrypted images using parametric binary tree labeling (IPBTL-RDHEI) for storage and transmission. With the correct keys, the 3D information can be extracted and decrypted, enabling high-quality optical reconstruction. Thus, the proposed encryption scheme integrates both optical and chaotic key mechanisms, offering a novel and practical solution for privacy protection and secure transmission of 3D information.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132967"},"PeriodicalIF":2.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172511","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}