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Glare suppression focusing method for high polarization purity focus generation. 用于高偏振纯度焦点生成的眩光抑制聚焦方法。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.565172
Kaige Liu, Hengkang Zhang, Tianhao Zhang, Bin Zhang, Xing Fu, Qiang Yuan, Qiang Liu
{"title":"Glare suppression focusing method for high polarization purity focus generation.","authors":"Kaige Liu, Hengkang Zhang, Tianhao Zhang, Bin Zhang, Xing Fu, Qiang Yuan, Qiang Liu","doi":"10.1364/OL.565172","DOIUrl":"https://doi.org/10.1364/OL.565172","url":null,"abstract":"<p><p>When a light beam propagates through strongly scattering media, not only does its amplitude and phase distribution become scrambled, but its polarization state also becomes randomized. This depolarization effect imposes significant limitations on the applications of vector light fields in scattering environments. In this Letter, we propose a glare suppression-based method for achieving highly polarization-pure scattering light focusing. For the target polarization direction, we employ the transmission matrix method to calculate the optimized focusing mask. While in its orthogonal-polarization direction, we utilize singular value decomposition (SVD) of the transmission matrix to identify low-eigenvalue transmission channels and reconstruct the focusing mask. Experimentally, we demonstrate over 40-fold enhancement in focal polarization ratio compared to a conventional method. We believe our method provides an effective solution for controlling full-polarization output using single-polarization input, which will be of interest in the fields of wavefront shaping and structured light.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"4086-4089"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289527","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-efficiency deep ultraviolet light-emitting diodes via δ-doping modulation of a thin p-GaN contact layer. 通过δ掺杂调制薄p-GaN接触层的高效深紫外发光二极管。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.561731
Xu Liu, Bin Tang, Jingjing Jiang, Zhefu Liao, Jiahao Song, Zhenxing Lv, Ziqi Zhang, Shengli Qi, Shengjun Zhou
{"title":"High-efficiency deep ultraviolet light-emitting diodes via δ-doping modulation of a thin p-GaN contact layer.","authors":"Xu Liu, Bin Tang, Jingjing Jiang, Zhefu Liao, Jiahao Song, Zhenxing Lv, Ziqi Zhang, Shengli Qi, Shengjun Zhou","doi":"10.1364/OL.561731","DOIUrl":"https://doi.org/10.1364/OL.561731","url":null,"abstract":"<p><p>AlGaN-based light-emitting diodes (LEDs) operating in the deep-ultraviolet (DUV) spectral range have exhibited a promising future on physical sterilization. However, poor light extraction efficiency (LEE) and low Mg doping efficiency hinder the further pursuit of high-performance AlGaN-based DUV LEDs. Herein, we developed an improvement strategy for a highly efficient 278-nm AlGaN-based DUV LED via performing δ-doping modulation in a thin p-GaN contact layer. The δ-doping modulation can optimize the thin p-GaN ohmic contact layer via improving the Mg doping efficiency, thereby increasing the electrical and optical performances of the DUV LEDs. Consequently, with the assistance of the proposed δ-doping modulation, the peak light output power (LOP) of the DUV LED is improved by 34.1% in comparison to its referred counterpart with conventional-doped thin p-GaN, respectively. Our work is able to supply a new horizon in the development of the highly efficient AlGaN-based DUV emitters.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3816-3819"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289529","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
IGZO-based transparent optoelectronic synapse for stealth mode trajectory tracking and registration. 基于igzo的透明光电突触隐身模式轨迹跟踪与配准。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.565162
Ramit Kumar Mondal, You Jin Kim, Munho Kim
{"title":"IGZO-based transparent optoelectronic synapse for stealth mode trajectory tracking and registration.","authors":"Ramit Kumar Mondal, You Jin Kim, Munho Kim","doi":"10.1364/OL.565162","DOIUrl":"https://doi.org/10.1364/OL.565162","url":null,"abstract":"<p><p>We report a transparent indium gallium zinc oxide (IGZO)-based optoelectronic synapse that exhibits strong persistent photoconductivity and tunable synaptic plasticity. The device, built on a quartz substrate with indium tin oxide electrodes, maintains over 70% transparency in the visible range, enabling stealthy operation. By modulating light duration, intensity, and frequency, we achieve key neuromorphic behaviors. A 3 × 3 device array further demonstrates trajectory tracking by mapping real-time ultraviolet illumination sequences. Notably, upon re-illumination, the device shows enhanced current, mirroring relearning in biological synapses. This work highlights the feasibility of IGZO-based synapses for next-generation transparent neuromorphic devices, providing new avenues for covert sensing for military purpose, interactive displays, and adaptive wearable electronics.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3864-3866"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289550","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
Optically induced holographic gratings in a ferroelectric nematic liquid crystal activated by an electric field. 电场激活铁电向列液晶中的光学诱导全息光栅。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.564279
Faheem Hassan, Yiming Zhang, Ziyang Qiu, Lotfi Saadaoui, Hongyi Chen, Donghao Yang, Yu Wang, Irena Drevensek-Olenik, Yigang Li, Xinzheng Zhang, Jingjun Xu
{"title":"Optically induced holographic gratings in a ferroelectric nematic liquid crystal activated by an electric field.","authors":"Faheem Hassan, Yiming Zhang, Ziyang Qiu, Lotfi Saadaoui, Hongyi Chen, Donghao Yang, Yu Wang, Irena Drevensek-Olenik, Yigang Li, Xinzheng Zhang, Jingjun Xu","doi":"10.1364/OL.564279","DOIUrl":"https://doi.org/10.1364/OL.564279","url":null,"abstract":"<p><p>One of the fundamental components in modern optics and advanced photonics is diffraction grating, crucial for designing compact and highly tunable advanced optical devices. We demonstrate formation of a dynamic diffraction grating induced by two wave-mixing in a ferroelectric nematic liquid crystal (N<sub>F</sub>LC) with the assistance of a weak electric field. A grating with a first-order diffraction efficiency of ∼3.8% was recorded with a recording intensity of 64 mW/cm<sup>2</sup>. The corresponding effective nonlinear refractive index <i>n</i><sub>2</sub> was around 2.6 × 10<sup>-2</sup> cm<sup>2</sup>/W, which is notably higher than that of pure nematic liquid crystals. The underlying mechanism is attributed to the reorientation of the director field caused by the synergic effect of combined torques originating from the optical and electric fields. The observed high nonlinearity offers a pathway for designing novel versatile liquid crystal-based devices, to our knowledge, expanding potential applications of ferroelectric nematics in various nonlinear and electro-optical processes.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"4038-4041"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289564","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
Signal enhancement in single-beam free-induction-decay magnetometers by manipulation of spin polarization. 操纵自旋极化增强单束自由感应衰减磁强计的信号。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.558171
Liwei Jiang, Jinghong Xu, Junhao Liu, Chi Fang, Jun Zhu, Yuntian Zou, Yuanqiang Chen, Jiali Liu, Xin Zhao
{"title":"Signal enhancement in single-beam free-induction-decay magnetometers by manipulation of spin polarization.","authors":"Liwei Jiang, Jinghong Xu, Junhao Liu, Chi Fang, Jun Zhu, Yuntian Zou, Yuanqiang Chen, Jiali Liu, Xin Zhao","doi":"10.1364/OL.558171","DOIUrl":"https://doi.org/10.1364/OL.558171","url":null,"abstract":"<p><p>The conventional single-beam free-induction-decay (FID) magnetometers based on an optical modulation scheme suffer from the reduction of signal in non-orthogonal magnetic field orientations, leading to worse magnetometer sensitivity. Here, we propose a scheme to enhance the signal in single-beam FID magnetometers by manipulation of spin polarization. The spin polarization built up by synchronous optical pumping is rotated to fully undergo free precession under the manipulation of the RF pulse field. We theoretically and experimentally validate the effectiveness of the proposed scheme, demonstrating that it achieves the enhancement of the FID signal in non-orthogonal magnetic field orientations and improves the magnetometer sensitivity. The scheme described in this work provides what we believe to be a new pathway to improve the magnetometer performance in various applications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"4014-4017"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289576","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
A simple independent triple-sideband THz signal generation and detection scheme based on delta-sigma modulation and heterodyne detection. 一种基于δ - σ调制和外差检测的简单的独立三边带太赫兹信号产生和检测方案。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.564027
Zheng Hu, Yilin Chen, Xue Han, Jiabao Zhao, JiaJun Chen, XinLei Li, Jiangnan Xiao
{"title":"A simple independent triple-sideband THz signal generation and detection scheme based on delta-sigma modulation and heterodyne detection.","authors":"Zheng Hu, Yilin Chen, Xue Han, Jiabao Zhao, JiaJun Chen, XinLei Li, Jiangnan Xiao","doi":"10.1364/OL.564027","DOIUrl":"https://doi.org/10.1364/OL.564027","url":null,"abstract":"<p><p>This paper proposes a scheme for the transmission and generation of independent triple-sideband (TSB) terahertz (THz) signals based on delta-sigma modulation (DSM) technology. The method converts multi-sideband high-order quadrature amplitude modulation (QAM) signals into a low-order quadrature phase shift keying (QPSK) signal, enabling the transmission of independent TSB 256/512QAM signals. Compared to directly transmitting high-order QAM signals over the standard single-mode fiber (SSMF), the signal after the DSM modulator reduces the average energy and enhances the system's noise resistance. The system achieves an improvement in optical signal-to-noise ratio (OSNR) gain of at least 2.5 dB. The receiver sensitivity gain for back-to-back (BTB) transmission and 60 km SSMF transmission is at least 1.5 dB and 2 dB higher, respectively. Additionally, at the receiver end, the original signal can be restored by simply eliminating out-of-band quantization noise through low-pass filtering, without the need for an additional digital-to-analog converter (DAC), which contributes to cost reduction. Simulation results demonstrate the successful transmission and detection of independent TSB 256/512QAM signals over SSMF at 320 GHz frequency, achieving a maximum transmission distance of 60 km. The bit error rate (BER) remains below the hard decision forward error correction (HD-FEC) threshold of 3.8 × 10<sup>-3</sup>, confirming the feasibility and effectiveness of the proposed scheme.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3891-3894"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289494","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
Chirality enhancement and topological dynamics of vectorial bound states in the continuum across structural parameter space. 结构参数空间连续体中矢量界态的手性增强和拓扑动力学。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.560905
Jiaqi Niu, Jingquan Liu, Bin Yang
{"title":"Chirality enhancement and topological dynamics of vectorial bound states in the continuum across structural parameter space.","authors":"Jiaqi Niu, Jingquan Liu, Bin Yang","doi":"10.1364/OL.560905","DOIUrl":"https://doi.org/10.1364/OL.560905","url":null,"abstract":"<p><p>Optical bound states in the continuum (BICs) are widely studied in photonics and metasurfaces for their high-quality (<i>Q</i>) resonances, which underpin applications in sensing, lasing, and nonlinear optics. While much is known about symmetry-protected BICs, which arise from mismatches in profile symmetry with the continuum, Friedrich-Wintgen BICs (FWBICs)-formed by total destructive interference of multiple leaky modes-are inherently less predictable and remain understudied. Topologically, BICs are characterized as polarization singularities in momentum space, and their dynamic evolution (e.g., topological charge spawning, merging, and annihilation) has been extensively explored. However, most reported FWBICs are scalar, meaning only one linear polarization state is relevant due to the mirror symmetry of the system. In this study, we investigate vectorial FWBICs in a planar chiral metasurface lacking in-plane mirror symmetry, mapping their topological dynamics across a two-dimensional space of structural parameters. Additionally, we demonstrate that enhanced chirality at quasi-FWBICs enables asymmetric transmission of circularly polarized light, with calculated asymmetry values approaching the theoretical maximum of 0.25 at the exceptional point. These findings deepen the understanding of FWBICs and their associated chiral optical phenomena in planar metasurfaces, offering insights for advanced polarization control and chiral photonic devices.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3962-3965"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289502","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
Dual-color dynamic holographic display referenced RGB optimization and system compactification. 双色动态全息显示参考了RGB优化和系统紧凑化。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.565640
Chi Hu, Shilei Jiang, Guobin Sun, Jin Zhang
{"title":"Dual-color dynamic holographic display referenced RGB optimization and system compactification.","authors":"Chi Hu, Shilei Jiang, Guobin Sun, Jin Zhang","doi":"10.1364/OL.565640","DOIUrl":"https://doi.org/10.1364/OL.565640","url":null,"abstract":"<p><p>In this Letter, we propose what we believe to be a novel method for compact color dynamic holographic displays by integrating hologram design with optimized RGB (red, green, and blue) component control. This approach simplifies the system layout and reduces performance requirements through weight optimization, enabling high-speed, high-quality holography without complex time/space multiplexing. Our key innovation lies in the joint optimization of hologram computation and color channel weighting, which reduces the hardware complexity of the spatial light modulator (SLM) display system while maintaining color performance. Numerical simulations and optical experiments validate the method's effectiveness, demonstrating a least half reduction in SLM complexity compared to conventional designs. The current implementation demonstrates a dual-color system, with full-color capability under active development.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"4130-4133"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289509","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
Enhancing field of view of digital holography using an angular multiplexed holographic optical element. 利用角度复用全息光学元件增强数字全息的视场。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.561590
Lavlesh Pensia, Manoj Kumar, Osamu Matoba, Raj Kumar
{"title":"Enhancing field of view of digital holography using an angular multiplexed holographic optical element.","authors":"Lavlesh Pensia, Manoj Kumar, Osamu Matoba, Raj Kumar","doi":"10.1364/OL.561590","DOIUrl":"https://doi.org/10.1364/OL.561590","url":null,"abstract":"<p><p>Digital holography (DH) is capable of the most precise multidimensional imaging and measurements in various fields ranging from optical metrology to biomedical imaging. However, DH has not progressed in accordance with its capabilities. The fundamental and technically challenging roadblock of DH is the small field of view (FOV) restricted by the parameters of the available digital image sensors. Here, we introduce a novel approach, to our knowledge, via the use of a specialized multiplexed holographic optical element that overcomes the limit of the maximum angle between the object and reference beams without violating the sampling theorem and achieves wide FOV, of more than 35°, in off-axis DH. The proof of the concept of the proposed wide FOV DH system is experimentally demonstrated by recording digital holograms of objects placed within the realm of an angular range of 0° to 35°. The method may be useful for various applications, including non-destructive testing, biomedical engineering, holographic displays, communication, entertainment, and beyond those envisioned in this paper.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3970-3973"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289517","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
GaSb-based widely tunable V-coupled-cavity laser with 255 nm wavelength tuning near 2 µm. 基于gasb的宽可调谐v -耦合腔激光器，波长255nm，调谐近2µm。
IF 3.1 2区 物理与天体物理
Optics letters Pub Date : 2025-06-15 DOI: 10.1364/OL.563165
Zihan Wei, Jingli Gong, Zhanyi Wang, Yihang Chen, Cheng-Ao Yang, Zhichuan Niu, Jian-Jun He
{"title":"GaSb-based widely tunable V-coupled-cavity laser with 255 nm wavelength tuning near 2 µm.","authors":"Zihan Wei, Jingli Gong, Zhanyi Wang, Yihang Chen, Cheng-Ao Yang, Zhichuan Niu, Jian-Jun He","doi":"10.1364/OL.563165","DOIUrl":"https://doi.org/10.1364/OL.563165","url":null,"abstract":"<p><p>This paper reports a GaSb quantum-well-based widely tunable V-coupled-cavity laser (VCCL) targeting the 1.7-2.0 µm spectral range, which is significant for gas detection and biomedical applications. The VCCL employs a half-wave coupler for single-mode selection without a grating structure, enabling a wide range of wavelength tuning by current and temperature adjustments. The laser exhibits a record tuning range of 255 nm from 80 K (-193.15°C) to 330 K (56.8°C) with a high side-mode suppression ratio (SMSR) and delivers several milliwatts of output power. It is also compatible with packaging into transmitter optical sub-assemblies (TOSA) for augmented performance. This technology advancement in a tunable mid-infrared laser has significant potential for various spectroscopic applications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"4118-4121"},"PeriodicalIF":3.1,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289524","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
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