Optics express最新文献_第6页

Room-temperature reactive sputtering of SiO₂ films for high-transmittance linear variable optical filters. 用于高透过率线性可变滤光片的SiO2薄膜的室温反应溅射。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.569379

Er-Tao Hu, Feng Yu, Jiawei Liu, Yongpeng Li, Peicheng Lin, Qi Zhang, Kehan Yu, Qing-Yuan Cai, Wei Wei

{"title":"Room-temperature reactive sputtering of SiO2 films for high-transmittance linear variable optical filters.","authors":"Er-Tao Hu, Feng Yu, Jiawei Liu, Yongpeng Li, Peicheng Lin, Qi Zhang, Kehan Yu, Qing-Yuan Cai, Wei Wei","doi":"10.1364/OE.569379","DOIUrl":"https://doi.org/10.1364/OE.569379","url":null,"abstract":"To address the limitations of conventional radio frequency (RF) magnetron sputtering using SiO2 target - particularly low deposition rates and pronounced optical absorption, we developed high-quality SiO2 thin films via RF reactive magnetron sputtering with a pure silicon target. The room-temperature (RT) deposition process eliminates the need for substrate heating, resulting in enhanced performance, including the removal of optical absorption and a twofold increase in deposition rate (from 1.15 to 2.85 nm/min), as verified by spectroscopic ellipsometry and X-ray photoelectron spectroscopy (XPS) characterization. Building on this advancement, we engineered linear variable optical filters (LVOFs) for spectral operation in the 500-700 nm range by combining the reactive-sputtered SiO2 and RF sputtered TiO2. The LVOFs demonstrated remarkable improvement of average transmittance from 67.7% to 93.6%. Temperature-dependent spectral analysis revealed a thermally-induced blue shift of 3.0 nm at 110 °C relative to RT measurements. This work establishes RT reactive magnetron sputtering as an effective fabrication strategy for high-performance optical filters, showing particular promise for applications requiring precise spectral control and thermal stability in ambient temperature deposition processes.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38515-38523"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125663","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

Investigation of spatiotemporal mode-locked fiber lasers with hybrid dispersion. 混合色散的时空锁模光纤激光器研究。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572955

Huaiwei Zhang, Jiying Peng, Wenyu Zhang, Yu Li, Xinyang Su, Fengping Yan, Yi Zheng

{"title":"Investigation of spatiotemporal mode-locked fiber lasers with hybrid dispersion.","authors":"Huaiwei Zhang, Jiying Peng, Wenyu Zhang, Yu Li, Xinyang Su, Fengping Yan, Yi Zheng","doi":"10.1364/OE.572955","DOIUrl":"https://doi.org/10.1364/OE.572955","url":null,"abstract":"In this work, by controlling the magnitude of the fourth-order dispersion (FOD) values introduced in the multimode fiber mode-locked laser system, the influence of hybrid dispersion (mainly second-order and FOD) on the spatiotemporal mode-locked fiber laser was studied. The numerical study results showed that the introduction of extra FOD enhanced the output pulse energy of the spatiotemporal mode-locked fiber laser and improved the energy stability range of the laser. In addition, the spatiotemporal mode-locked fiber laser system generated pump power-dependent mode competition by the combined effect of FOD and Raman effect, achieving bi-stable spatiotemporal mode-locking with mode complementarity. Specifically, following entry into the pulsating state from the steady-state mode-locking regime with increasing pump power, the system can re-enter a steady state with additional pump power elevation. However, the spatial mode composition involved in the steady-state mode-locking changes during this transition. Notably, this bi-stable behavior has not been reported in previous studies. These findings demonstrate that spatial mode modulation is achievable by rational utilization of FOD and nonlinear effect synergies. For the first time, to our knowledge, this study reveals the critical role of FOD in multimode fiber laser systems, providing new insights into spatiotemporal dynamics of higher-order dispersion and offering novel design strategies for high-energy lasers.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37738-37747"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125684","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

Comparative performance of line-scanning SD-OCT versus free-space and fiber-based flying-spot SD-OCT. 线扫描SD-OCT与自由空间和基于光纤的飞点SD-OCT的性能比较。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.576201

Yueqing Wu, Mingliang Wang, Jie Liu, Yi Chen, Jiayi Zhang, Fangjian Xing, Yunsong Di, Zhixing Gan, Cihui Liu

{"title":"Comparative performance of line-scanning SD-OCT versus free-space and fiber-based flying-spot SD-OCT.","authors":"Yueqing Wu, Mingliang Wang, Jie Liu, Yi Chen, Jiayi Zhang, Fangjian Xing, Yunsong Di, Zhixing Gan, Cihui Liu","doi":"10.1364/OE.576201","DOIUrl":"https://doi.org/10.1364/OE.576201","url":null,"abstract":"Line-scanning spectral-domain optical coherence tomography (LS-SD-OCT) is an alternative OCT configuration that enables parallel illumination and detection along the fast scanning axis, thereby eliminating the need for mechanical scanning in that direction. This feature makes LS-SD-OCT particularly suitable for high-throughput imaging applications. In such systems, the sample is illuminated by a focused line-shaped beam, which necessitates a free-space optical setup to relay the beam onto the image plane and to capture B-scans using a two-dimensional (2D) camera. However, this configuration presents inherent challenges: object points at different depths experience defocus, and scattered photons from adjacent A-scan channels can lead to crosstalk. These effects degrade resolution and reduce the clarity of both en-face and cross-sectional images. In this work, we quantitatively evaluate the imaging performance of LS-SD-OCT by constructing the point spread function (PSF) along the fast axis, taking into account both defocus and scattering in adhesive tape and onion samples. The results are systematically compared with those from free-space flying-spot SD-OCT(FS-SD-OCT) and fiber-based FS-SD-OCT systems. Our findings indicate that the image quality of LS-SD-OCT is inferior to that of FS-SD-OCT systems, offering practical insights for future enhancements of the LS-SD-OCT technique.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37990-38004"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125689","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

Kerr-resonanced bifurcation switching in a photonic Ising machine with a long lossless optical fiber loop. 具有长无损光纤环路的光子伊辛机中的克尔共振分岔开关。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.568935

Masataka Nakazawa, Toshihiko Hirooka

{"title":"Kerr-resonanced bifurcation switching in a photonic Ising machine with a long lossless optical fiber loop.","authors":"Masataka Nakazawa, Toshihiko Hirooka","doi":"10.1364/OE.568935","DOIUrl":"https://doi.org/10.1364/OE.568935","url":null,"abstract":"We describe in detail the optical Kerr nonlinearity in our photonic Ising machine (PIM), which employs ultrahigh-speed optical pulse propagation in a lossless fiber loop. Although the peak power of the pulses in the fiber loop is set as low as ∼1 mW, the present PIM requires ultralong-distance pulse propagation of the order of 100,000 km (e.g., ∼2,000 circulations in a 50 km loop) to calculate large-scale optimization problems. As a result, a nonlinear phase rotation of greater than π/2 is accumulated due to the Kerr effect. This nonlinear phase rotation makes it possible to couple between the real (I) and imaginary (Q) parts of the recirculating optical pulse. Thus, as the amplitude of the I-channel changes due to the nonlinear phase rotation, the Q-channel also varies accordingly, and vice versa. We show that this mutual coupling gives rise to a new phenomenon, which we name Kerr-resonanced bifurcation switching, where the accumulated nonlinear phase rotation results in a periodic dip in the cut value of a max-cut problem. This dip phenomenon can be understood as a consequence of optical power peaking in a nonlinear optical fiber loop resonator with Kerr phase rotation. Finally, we propose a method for preventing dip generation by combining a large core fiber and a chirped fiber Bragg grating (CFBG) over a short length, which can reduce the Kerr-induced nonlinear phase rotation.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37559-37584"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125727","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

Interfacial engineering in WS₂/CdSe heterostructures for high-performance broadband photodetection. 用于高性能宽带光探测的WS2/CdSe异质结构界面工程。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572216

Lei Liu, Hui Zhang, Guojie Luo, Desheng Li, Chengsheng Yang, Juan Wang, Changming Liu, Yingkai Liu

{"title":"Interfacial engineering in WS2/CdSe heterostructures for high-performance broadband photodetection.","authors":"Lei Liu, Hui Zhang, Guojie Luo, Desheng Li, Chengsheng Yang, Juan Wang, Changming Liu, Yingkai Liu","doi":"10.1364/OE.572216","DOIUrl":"https://doi.org/10.1364/OE.572216","url":null,"abstract":"The optoelectronic performance of two-dimensional transition metal dichalcogenides is fundamentally limited by their weak light absorption at atomic-scale thicknesses. To overcome this challenge, we introduced gold nanoparticles at the van der Waals interface of WS2/CdSe with optimized type-II band alignment. The integrated Au nanoparticles served dual functions. Firstly, the nanoparticles created plasmonic hotspots that amplified localized electric fields via surface plasmon resonance, significantly boosting light absorption and photocurrent generation. Secondly, the nanoparticles formed Schottky contacts that established electron depletion zones and then suppressed dark current. This synergistic approach yielded excellent performance enhancements, including a 339.9× improvement in light-to-dark current ratio and 119.9× higher responsivity (550 nm, 11.57 mW/cm2) compared to the WS2/CdSe control. Comprehensive characterization through scanning Kelvin probe force microscopy and finite-element simulations verified both the band alignment and plasmonic enhancement mechanisms, establishing interfacial engineering as a universal strategy for developing high-performance two-dimensional optoelectronic devices.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37450-37461"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125734","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

Polarization-multiplexed achromatic metasurface for the mid-infrared via inverse design. 基于反设计的中红外偏振复用消色差超表面。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.573705

Xiaoling Ge, Yongcan Zeng, Xinrui Lei, Jinzhan Zhong, Yi Zhou, Fengyuan Gan, Qiwen Zhan

{"title":"Polarization-multiplexed achromatic metasurface for the mid-infrared via inverse design.","authors":"Xiaoling Ge, Yongcan Zeng, Xinrui Lei, Jinzhan Zhong, Yi Zhou, Fengyuan Gan, Qiwen Zhan","doi":"10.1364/OE.573705","DOIUrl":"https://doi.org/10.1364/OE.573705","url":null,"abstract":"Metasurfaces composed of micro- and nano-structured artificial media have attracted increasing research attention over the past decades due to their excellent electromagnetic manipulation capabilities and potential applications in ultra-compact optical devices. Specifically, mid-infrared metasurfaces hold significant promise in energy harvesting, chemical and biological sensing. However, simultaneously achieving good achromaticity, wide bandwidth, and optical signal integrity remains a challenge due to the multi-objective optimization constraints of meta-atoms. Here, a simple and efficient inverse design method is used to realize a mid-infrared polarization multiplexed achromatic metasurface composed of dual-layer Si rectangular nanopillars. The structural features of the dual-layer meta-atom allow for a higher degree of design freedom and the ability to modulate the optical field over a wide bandwidth (1600 nm) with a central wavelength at 4µm. Simulation results show that the metasurface focuses linearly polarized light in the x and y directions into a single focal point (Lx = 0) and vortex light (Ly = 2), respectively. The full width at half maximum of the spots is close to the diffraction limit. At the same time, the crosstalk of the optical signal is lower than -13.5 dB, and the signal-to-noise ratio (SNR) reaches as high as 18 dB. The proposed dual-layer cell polarization-multiplexing dispersion optimization method facilitates the design of multiplexed metasurface devices with its simple and effective algorithm while increasing the design freedom. It provides new ideas for the design of complex and reconfigurable metasurface devices.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"39156-39166"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125645","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

Ultra-thin f-theta metalens with high focus resolution and large field of view. 超薄的f-theta超透镜，具有高聚焦分辨率和大视野。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.570030

Tong Jiang, Hao Ding, Mandi Rong, Yunzhe Zhang, Yujun Xing, Gang Wang, Xingang Ren, Xiaobo Zhang, Li Ding, Zhixiang Huang

{"title":"Ultra-thin f-theta metalens with high focus resolution and large field of view.","authors":"Tong Jiang, Hao Ding, Mandi Rong, Yunzhe Zhang, Yujun Xing, Gang Wang, Xingang Ren, Xiaobo Zhang, Li Ding, Zhixiang Huang","doi":"10.1364/OE.570030","DOIUrl":"https://doi.org/10.1364/OE.570030","url":null,"abstract":"Conventional f-theta(f-θ) lens systems often rely on cascading multiple lenses or adopting complex surface profiles to achieve high-precision scanning and laser processing over a large field of view (FOV), leading to significant increases in system volume and manufacturing complexity. This study presents an ultra-thin f-θ lens for a 10.6µm laser processing system, realizing high-performance scanning through a collaborative optimization method of cascaded metasurfaces. Simulation results based on dual-layer cascaded metasurfaces show that within the ±32° light deflection range, the spot diameter remains below 20µm, the maximum f-θ distortion is controlled at 0.19%, and the Strehl ratio (SR) across the entire FOV exceeds 0.99, verifying the system's imaging performance approaching the diffraction limit. Phase sampling analysis of the cascaded metalenses indicates that when the sampling step varies within 3-9µm, there is no significant difference in spot performance, which greatly reduces the fabrication difficulty and cost. Further research demonstrates that when the phase mutation rate is controlled within 8%, the system maintains stable scanning characteristics, while exceeding 9% leads to severe wavefront distortion and drastic deterioration of optical performance, providing a quantitative basis for processing error control. The wavelength analysis of the designed f-θ lens reveals that it maintains good performance within an 80 nm bandwidth. This study provides an integrated solution for compact laser processing systems, and its technical achievements can promote the large-scale application of metasurface optical elements in optical imaging, optical metrology, and laser processing.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38099-38112"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125662","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

High-contrast nonlinear spiral phase contrast imaging via four-wave mixing in atomic medium. 原子介质中四波混频高对比度非线性螺旋相衬成像。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.572157

Wei Gao, Sandan Wang, Jinpeng Yuan, Lirong Wang, Liantuan Xiao, Suotang Jia

{"title":"High-contrast nonlinear spiral phase contrast imaging via four-wave mixing in atomic medium.","authors":"Wei Gao, Sandan Wang, Jinpeng Yuan, Lirong Wang, Liantuan Xiao, Suotang Jia","doi":"10.1364/OE.572157","DOIUrl":"https://doi.org/10.1364/OE.572157","url":null,"abstract":"Nonlinear spiral phase contrast imaging serves as a powerful tool for high-performance image edge detection in optical imaging. Compared to conventional computer-based digital imaging methods, it offers numerous possibilities for optical image processing with superior speed, lower energy consumption, and high information capacity. Here, we experimentally demonstrate the high-contrast nonlinear spiral phase contrast imaging in a diamond-type atomic system. A pump vortex-filtered beam (780 nm) and a signal beam with object image (776 nm) simultaneously interact with Rb atomic medium. As a result, a 420 nm beam is generated via the nonlinear four-wave mixing process, carrying the edge information of asymmetric Arabic numeral patterns. The geometric patterns such as triangle, circle, and square are further utilized to validate the effectiveness of nonlinear spiral phase contrast imaging. The high image contrast of ∼95.8% is achieved owing to the stringent phase matching conditions via the atomic four-wave mixing process. Moreover, the directional nonlinear spiral phase contrast imaging of circle and square patterns at 420 nm are realized by employing a Laguerre-Gaussian composite vortex filter on the 780 nm pump beam. This work establishes a versatile platform for multi-wavelength optical image analysis and provides a robust foundation for developing optical information processing methods.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38382-38391"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125666","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

Multi-input neural channel waveform model for optical fiber WDM transmission based on Volterra series transfer function. 基于Volterra串联传递函数的光纤WDM传输多输入神经通道波形模型。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.563482

Xingchen He, Lianshan Yan, Lin Jiang, Jihui Sun, Anlin Yi, Wei Pan, Bin Luo

{"title":"Multi-input neural channel waveform model for optical fiber WDM transmission based on Volterra series transfer function.","authors":"Xingchen He, Lianshan Yan, Lin Jiang, Jihui Sun, Anlin Yi, Wei Pan, Bin Luo","doi":"10.1364/OE.563482","DOIUrl":"https://doi.org/10.1364/OE.563482","url":null,"abstract":"Accurate waveform modeling of optical fiber channels is essential for the design, optimization, and management of wavelength-division multiplexing (WDM) systems in optical communication networks. To address the computational inefficiencies of the traditional split-step Fourier method (SSFM), deep learning has achieved significant advancements in this field. However, current deep learning based channel models take only transmitted signals as inputs, achieving good generalization for system parameters that can be derived from the signal waveform. For system parameters such as baud rate, dispersion and nonlinearity coefficients that cannot be extracted from the waveform, any variation in these parameters necessitate retraining the model, thereby limiting its flexibility. Here, we build upon the existing physics-based Volterra series transfer function algorithm and employ neural network parameterization in the frequency domain (NN-VS) to achieve high-accuracy and robust generalization modeling of WDM channels with support for multi-parameter inputs. We evaluated the performance of NN-VS in simulations of a 40-channel 600 km and a 5-channel 1200 km WDM system. Under various baud rates, dispersion coefficients, and nonlinearity coefficients, the proposed NN-VS scheme achieved an average Q-factor error of less than 0.15 dB at the optimal launch power. Furthermore, NN-VS demonstrates superior computational efficiency compared to SSFM, achieving transmission in a 40-channel WDM scenario with less than 2% of the real multiplications while delivering millisecond-scale runtime on a GPU.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"38644-38656"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125667","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

Active switching of chirality at exceptional points in terahertz metasurface and its multifunctional sensing applications. 太赫兹超表面异常点手性的主动开关及其多功能传感应用。

IF 3.3 2区物理与天体物理

Optics express Pub Date : 2025-09-08 DOI: 10.1364/OE.569380

Zhenkai Li, Wu Ren, Xiaoyun Song, Zhenghui Xue, Weiming Li

{"title":"Active switching of chirality at exceptional points in terahertz metasurface and its multifunctional sensing applications.","authors":"Zhenkai Li, Wu Ren, Xiaoyun Song, Zhenghui Xue, Weiming Li","doi":"10.1364/OE.569380","DOIUrl":"https://doi.org/10.1364/OE.569380","url":null,"abstract":"The missing dimensionality in the parameter space of non-Hermitian systems endows exceptional points (EPs) with inherent chirality, making EPs particularly valuable for ultrasensitive sensing, asymmetric optical transmission, and laser directional emission. Here we demonstrate dynamic chirality switching at three EPs in a single metasurface through temperature-controlled conductivity modulation of vanadium dioxide (VO2). Depending on the resonant field distributions of VO2 patches under low- and high-conductivity states, the system is modeled as either a tri-mode dual-port or bi-mode dual-port configuration. The Hamiltonian is constructed via coupled mode theory, and the eigenvalue and eigenstate evolution in polarization space are systematically analyzed. Based on EP in metasurface, three sensing schemes are designed for chiral enantiomer discrimination, refractive index, and temperature sensing, respectively. The proposed method provides a novel perspective for multi-EP design, chiral switching, and multifunctional sensing in metasurfaces, which can be extended to various non-Hermitian systems from microwave, infrared to visible light.","PeriodicalId":19691,"journal":{"name":"Optics express","volume":"33 18","pages":"37585-37600"},"PeriodicalIF":3.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125675","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