Optics express最新文献_第5页

Nonlocal metasurface with angle-robust high-quality-factor flat-band resonances via two-dimensional Brillouin zone folding. 基于二维布里渊区折叠的具有角度鲁棒性高质量因子平带共振的非局部超表面。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.611554

Rongrong Jia, Jiaxin Xia, Qianqian Luo, Feng Wu, Jingyi Tian, Yihang Chen, Meiyan Pan

{"title":"Nonlocal metasurface with angle-robust high-quality-factor flat-band resonances via two-dimensional Brillouin zone folding.","authors":"Rongrong Jia, Jiaxin Xia, Qianqian Luo, Feng Wu, Jingyi Tian, Yihang Chen, Meiyan Pan","doi":"10.1364/OE.611554","DOIUrl":"https://doi.org/10.1364/OE.611554","url":null,"abstract":"High-quality (Q) factor resonances in nonlocal metasurfaces are highly desired for enhancing light-matter interactions. However, high-Q resonances typically suffer from significant wavelength shifts or Q-factor degradation with varying incident angles. Current strategies to improve angular robustness have been largely confined to one-dimensional cases and work in reflection mode. In this work, we propose a high-Q transmissive metasurface that addresses this limitation by engineering quasi-guided modes to suppress angular dispersion and Q factor degradation in the two-dimensional Brillouin zone. This is achieved through two-dimensional Brillouin zone folding, which replicates geometrically tuned flat bands from the boundary to the center, coupled with asymmetry-engineered far-field excitation. Our approach eliminates the inherent trade-off between maintaining a high Q-factor and ensuring angular stability of nonlocal resonances, demonstrating exceptional robustness: the Q-factor remains above 103 with stable resonant wavelengths and circular-polarization independence over a wide angular range of ±18° in both the x-z and y-z planes. Moreover, our design extends angle-robust high-Q flat-band spectral filtering from reflection to transmission, enabling ultra-narrowband filtering in transmission. This work paves the way for advancements in nonlinear photonics, spectroscopic sensing, and quantum sensing.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"34 20","pages":"37214-37224"},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149112952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

PGGC: phase-gradient Gray code with temporal pattern sharing for 3D measurement. 相位梯度灰度码与时间模式共享三维测量。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.614434

Haitao Wu, Yiping Cao, Yu Zhang, Jinlong Li, Zhijie Wang, Yingying Wan

{"title":"PGGC: phase-gradient Gray code with temporal pattern sharing for 3D measurement.","authors":"Haitao Wu, Yiping Cao, Yu Zhang, Jinlong Li, Zhijie Wang, Yingying Wan","doi":"10.1364/OE.614434","DOIUrl":"https://doi.org/10.1364/OE.614434","url":null,"abstract":"Temporal phase unwrapping commonly projects phase-shifted fringes and auxiliary codewords separately, which increases the acquisition burden in dynamic fringe projection profilometry. We propose phase-gradient Gray code (PGGC), which represents four Gray-code bits through controlled reversals of phase-gradient polarity. Successive exchanges of orthogonal sine and cosine fringe pairs form a 12-pattern cyclic sequence, from which five overlapping demodulation groups recover one reference phase and four Gray-code-bearing wrapped phases. Distance-adaptive gradient voting, half-period connectivity, and stable-region voting are then used to decode and refine the fringe orders before phase-polarity restoration and reference-consistency correction. The phase-shifting patterns thereby support both wrapped-phase retrieval and fringe-order decoding without a separate intensity-codeword sequence. In the low-reflectivity experiment, PGGC achieved a fringe-order disagreement rate of 0.118% relative to complementary Gray code (CGC), the lowest among the non-reference methods tested. Static and high-spatial-frequency experiments further demonstrated the reconstruction procedure, and continuous acquisition was evaluated with a model rotating at approximately 4 rpm. At 120 projected patterns/s, each 12-pattern cycle yields five temporally shared phase outputs, corresponding to an average of 50 phase maps/s. Reference-consistency correction supports this reconstruction under limited intra-cycle physical phase variation.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"34 20","pages":"38284-38301"},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149113097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Analytical modeling of LRCS for multiple scattering of Lambertian dihedral angle. 朗伯二面角多重散射的LRCS解析建模。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.606447

Kai Liu, Yunhua Cao, Haiying Li, Xing Guo

引用次数: 0

PRI-Net: two-stage complex-field restoration and height inversion for single-hologram morphology reconstruction in reflective digital holography. PRI-Net：反射数字全息中单全息形态重建的两级复场恢复和高度反演。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.612328

Yushuo Feng, Feixue Hou, Zihan Tang, Jing Yu, Ming Kong, Liu Huang, Wei Liu

引用次数: 0

High responsivity waveguide photodiodes based on a multi segment taper coupling structure. 基于多段锥度耦合结构的高响应度波导光电二极管。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.611098

Juncheng Liu, Tianyu Sun, Guannan Lv, Zheng Xing, Kexue Li, Jilong Tang, Zhongming Zeng, Zhipeng Wei, Baoshun Zhang

引用次数: 0

Geometric-anisotropy-controlled degeneracy lifting and vortex singularity splitting with dominant +2 orbital angular momentum. 具有优势+2轨道角动量的几何各向异性控制的简并提升和涡旋奇点分裂。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.612114

Junfeng Zhao, Yunping Qi, Jiayong Hu, Yawei Dou, Xiangxian Wang

{"title":"Geometric-anisotropy-controlled degeneracy lifting and vortex singularity splitting with dominant +2 orbital angular momentum.","authors":"Junfeng Zhao, Yunping Qi, Jiayong Hu, Yawei Dou, Xiangxian Wang","doi":"10.1364/OE.612114","DOIUrl":"https://doi.org/10.1364/OE.612114","url":null,"abstract":"Bound states in the continuum (BICs) enable the support of spatially confined electromagnetic fields within the radiation continuum, exhibiting high-quality factors and nontrivial topology in the far field. This paper investigates a silicon nitride (Si3N4) photonic crystal incorporating rotated elliptical holes. This geometric anisotropy reduces the in-plane symmetry, lifts the original mode degeneracy, and redistributes coupling to the radiation channels. The Γ-point states remain radiative, whereas the two branches formed after degeneracy lifting separately support off-Γ BICs at nonzero in-plane wave vectors. The selected target branch retains a narrowband resonance, while the same perturbation splits a higher-order vortex singularity into two spatially separated first-order singularities, producing two dark regions. As the anisotropy increases, the spectral shifting and singularity splitting evolve in a correlated manner. Propagation analysis shows that the orbital angular momentum (OAM) component with l = + 2 remains dominant over a representative propagation range, while its mode purity varies with propagation distance. The proposed structure therefore provides a compact route to narrowband vortex-beam generation and a potential field platform for structured-light control and multiparticle optical manipulation.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"34 20","pages":"37225-37240"},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149113241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Angular-momentum-controlled multipolar scattering for geometry-sensitive spectral tuning. 用于几何敏感光谱调谐的角动量控制多极散射。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.612661

Zuxian He, Yanju Ji, Andrey B Evlyukhin, Vladimir R Tuz

{"title":"Angular-momentum-controlled multipolar scattering for geometry-sensitive spectral tuning.","authors":"Zuxian He, Yanju Ji, Andrey B Evlyukhin, Vladimir R Tuz","doi":"10.1364/OE.612661","DOIUrl":"https://doi.org/10.1364/OE.612661","url":null,"abstract":"Structured electromagnetic beams provide a unique degree of freedom for controlling light-matter interactions through their phase, polarization, and angular momentum. The influence of the total angular momentum projection, which combines the orbital and spin (helicity) contributions of the incident field, on multipolar scattering by nonspherical dielectric particles remains largely unexplored. We systematically investigate the scattering response of four canonical dielectric particle geometries illuminated by right-circularly polarized beams carrying total angular momentum projections m = 1 and m = 2 in the microwave regime. To enable rigorous full-wave simulations of structured-wave scattering by arbitrarily shaped particles, we employ an antenna-based structured-field excitation scheme together with exact Cartesian multipole decomposition. We show that the m = 1 beam simultaneously excites dipolar and quadrupolar resonances, whereas the m = 2 beam couples predominantly to quadrupolar resonances, yielding a quadrupole-dominated scattering response with the quadrupole purity exceeding 99% at the magnetic-quadrupole resonances of the sphere, cylinder, and cube and remaining above 90% at all quadrupole-dominated resonances. This mode-selective excitation remains robust against variations in particle geometry, aspect ratio, and alignment imperfections. At the same time, the quadrupole resonance frequencies exhibit pronounced sensitivity to geometric parameters, enabling precise spectral tuning. These findings establish a symmetry-driven mechanism for controlling multipolar scattering with structured electromagnetic fields and demonstrate that the proposed full-wave approach provides a versatile computational framework for investigating structured-wave interactions with complex dielectric resonators. The results highlight the potential of angular-momentum-controlled beams for mode-selective excitation and geometry-sensitive spectral tuning.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"34 20","pages":"38733-38753"},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149113244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Scene-based semi-supervised algorithm for self-calibration of polarization imaging systems. 基于场景的偏振成像系统自定标半监督算法。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.606966

Qiwei Liu, Xia Wang, Jiaan Xue, Geng Li, Ranfeng Wei

引用次数: 0

Suppressed efficiency droop and size effect in InGaN micro-LEDs via engineered carrier confinement using Al-composition stepwise quantum barriers. 利用铝成分逐步量子势垒抑制InGaN微型led的效率下降和尺寸效应。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.608234

Yaozong Zhang, Yuqi Huang, Guobin Wang, Chunquan Zhang, Binbin Chen, Jun Yin, Jing Li, Ke Xu, Junyong Kang

{"title":"Suppressed efficiency droop and size effect in InGaN micro-LEDs via engineered carrier confinement using Al-composition stepwise quantum barriers.","authors":"Yaozong Zhang, Yuqi Huang, Guobin Wang, Chunquan Zhang, Binbin Chen, Jun Yin, Jing Li, Ke Xu, Junyong Kang","doi":"10.1364/OE.608234","DOIUrl":"https://doi.org/10.1364/OE.608234","url":null,"abstract":"With the growing demand for micro-light-emitting diodes (micro-LEDs) operating at high current densities, efficiency droop has become a major challenge for conventional GaN-based devices fabricated on c-plane sapphire substrates. Here, InGaN-based blue micro-LEDs incorporating Al-composition stepwise quantum barriers (QBs) were designed and fabricated. Simulations show that the stepwise QBs effectively enhance carrier confinement in the quantum wells by increasing the effective potential barrier height. Subsequent experimentally fabricated micro-LEDs with stepwise QBs exhibit significantly improved emission performance, with an external quantum efficiency (EQE) 1.2 times higher than that of conventional devices even at a high current density of 1000 A cm-2. Simultaneously, the improved radiative recombination also reduces size sensitivity, leading to smaller efficiency droop as the device size decreases from 60 to 30 μm. These results provide a promising strategy for high-efficiency micro-LEDs with suppressed efficiency droop and size effect under high-current operation.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"34 20","pages":"37354-37366"},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149113268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

ITO-based multi-band metasurface absorber for early detection of hepatic cancer through deep learning. 基于ito的多波段超表面吸收剂用于肝癌的深度学习早期检测。

IF 3.4 2区物理与天体物理

Optics express Pub Date : 2026-10-05 DOI: 10.1364/OE.603660

Uswa Farooq, Hamza Asif Khan, Fozia Murtaza, Moath Alathbah, Li Yang, Nan Liu

{"title":"ITO-based multi-band metasurface absorber for early detection of hepatic cancer through deep learning.","authors":"Uswa Farooq, Hamza Asif Khan, Fozia Murtaza, Moath Alathbah, Li Yang, Nan Liu","doi":"10.1364/OE.603660","DOIUrl":"https://doi.org/10.1364/OE.603660","url":null,"abstract":"This study introduces a multi-band metasurface absorber, optimized for high-sensitivity detection of hepatic (liver) cancer. The unit cell comprises a top ITO sheet with several \"+\" - shaped slots, in which a graphene layer is incorporated into the central slot. This layer is attached to a quartz glass substrate to provide optical clarity, while a continuous ITO ground layer is used to mitigate electromagnetic (EM) transmission. Simulation results indicate that the structure attains exceptional absorption of 95%, 99%, 96%, and 94% at 0.594 (f1), 0.988 (f2), 1.196 (f3), and 1.518 (f4) THz, respectively. Electric field distribution and an equivalent electric circuit (EEC) analysis are used to theoretically analyze and confirm the resonance properties and physical operating mechanism. Furthermore, the proposed multi-band metasurface absorber demonstrates a sensitivity of 36 GHz/RIU, a Figure of Merit (FOM) of 2045 RIU-1, and a quality factor (Q-factor) of 70, thereby enabling reliable and precise detection of minor refractive index fluctuations associated with hepatic cancer biomarkers. To improve diagnostic accuracy, a deep learning (DL) analysis framework is used to distinguish cancerous hepatic tissues. The model demonstrates 99.9% accuracy on the training data, with a validation accuracy of 98.7%. Owing to its multi-band adaptability and DL-driven enhanced detection accuracy, the proposed work provides a revolutionary foundation for next-generation visually accessible oncological diagnostics and advanced biomedical imaging.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"34 20","pages":"37286-37307"},"PeriodicalIF":3.4,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149113327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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