Optics letters最新文献_第3页

Optical analog cross-correlation computing for pattern recognition based on a dielectric metasurface. 基于介电超表面的模式识别光学模拟相互关计算。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.559616

Xu Yang, Di Wang, He Ren, Shuai Zhou, Zhile Wang, Shouqian Chen

引用次数: 0

Wavelength-dependent tri-state waveform modulation in self-powered n-Si/Au nanoparticles/CdS heterojunction photodetectors. 自供电n-Si/Au纳米颗粒/CdS异质结光电探测器中波长依赖的三态波形调制。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.559827

Boyong Zhang, Jianyuan Wang

{"title":"Wavelength-dependent tri-state waveform modulation in self-powered n-Si/Au nanoparticles/CdS heterojunction photodetectors.","authors":"Boyong Zhang, Jianyuan Wang","doi":"10.1364/OL.559827","DOIUrl":"https://doi.org/10.1364/OL.559827","url":null,"abstract":"Photoresponse waveforms visually describe the charge carrier dynamics in a photodetector (PD) and serve as a means of conveying optical information, analogous to the photoresponse amplitude and polarity. Nevertheless, the waveforms of most photodetectors are frequently neglected due to the difficulty of distinguishing them. Herein, three distinct waveform modes are realized in a self-powered n-Si/Au nanoparticle/CdS heterojunction photodetector, corresponding to different wavelengths from the near-ultraviolet to near-infrared spectrum. This wavelength-dependent tri-state photoresponse is a selective combination of dual-polarity steady-state photocurrents and transient spike currents, which arise from the synergistic effects of several mechanisms, including selective light absorption, opposing built-in electric fields, light-induced pyroelectric effect of wurtzite CdS, and localized surface plasmon resonance of Au nanoparticles. The working principle is systematically verified, and the threshold CdS thickness for tri-state photoresponse is revealed. Notably, the unique property of wavelength-dependent tri-state photoresponse offers a pathway for RGB waveform modulation in visible light communication.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 11","pages":"3553-3556"},"PeriodicalIF":3.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144187547","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

2.3-μm deep UV micro-LEDs fabricated by self-aligned selective thermal oxidation process. 采用自对准选择性热氧化工艺制备2.3 μm深紫外微led。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.562200

Zhiyuan Liu, Haicheng Cao, Tingang Liu, Patsy A Miranda Cortez, Zixian Jiang, Kexin Ren, Na Xiao, Yi Lu, Xiao Tang, Zuojian Pan, Xiaohang Li

{"title":"2.3-μm deep UV micro-LEDs fabricated by self-aligned selective thermal oxidation process.","authors":"Zhiyuan Liu, Haicheng Cao, Tingang Liu, Patsy A Miranda Cortez, Zixian Jiang, Kexin Ren, Na Xiao, Yi Lu, Xiao Tang, Zuojian Pan, Xiaohang Li","doi":"10.1364/OL.562200","DOIUrl":"https://doi.org/10.1364/OL.562200","url":null,"abstract":"Recently, techniques for fabricating micro-sized deep ultraviolet light-emitting diodes (DUV LEDs) have been gaining attention. In this work, we propose a selective thermal oxidation (STO) process to fabricate ultra-small DUV micro-LEDs. Annealed in the air at 900°C for 2 h, the p-layers without SiO2 protection are oxidized into insulating oxides, and oxygen penetrates into parts of the quantum wells. In contrast, the patterned SiO2 protects the LED structure in the pixel regions. Therefore, micro-LED pixels are formed by the patterned SiO2 and thermal oxidation process rather than the conventional reactive ion etching. The formed oxide in the unprotected region can function as the insulation layer between p-n electrodes. Meanwhile, the boundary between the pixel and the surrounding oxide is naturally formed during thermal oxidation, which is a \"self-aligned\" process. Dielectric deposition, precise lithography alignment, and aperture etching in the conventional process are no longer required in STO-based micro-LED fabrication, which reduces production complexity and cost. Based on the STO process, we have achieved 2.3-µm DUV micro-LED standalone pixels and arrays with a 270-nm emission wavelength. The standalone DUV micro-LED is possibly the smallest reported in the literature to date, which has a low-operation voltage of 4.9 and 6.75 V at 10 and 1000 A/cm2. Meanwhile, the fabricated DUV micro-LED arrays show leakage current density 4 × 10-7 A/cm2 at -5 V and a peak EQE of 0.77% under unpackaged conditions. We hope this work provides a new insight into micro-LED fabrication and further promotes future performance growth of DUV LEDs.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 11","pages":"3628-3631"},"PeriodicalIF":3.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144187465","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

Calibration free broadband polarization-insensitive silicon optical switch. 免校准宽带偏振不敏感硅光开关。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.562195

Dongyue Sun, Shi Zhao, Mingyu Zhu, Daoxin Dai, Yaocheng Shi

引用次数: 0

Dispersion-managed all-fiber broadband GHz fs laser at 1.0 μm. 色散管理的1.0 μm全光纤宽带GHz fs激光器。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.564718

Yuke Sheng, Zihan Li, Xiaoyan Zeng, Wei Lin, Lin Ling, Zhaoheng Liang, Xuewen Chen, Yalong Liu, Fei Yang, Xiaoming Wei, Zhongmin Yang

引用次数: 0

Facet oriented coupling stabilizes PbS quantum dots for infrared LEDs. 面向面耦合稳定红外led的PbS量子点。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.559814

Shuaipu Zang, Manman Gong, Qiulei Xu, Jiaojiao Song, Lei Wang, Lin Song Li, Huaibin Shen

{"title":"Facet oriented coupling stabilizes PbS quantum dots for infrared LEDs.","authors":"Shuaipu Zang, Manman Gong, Qiulei Xu, Jiaojiao Song, Lei Wang, Lin Song Li, Huaibin Shen","doi":"10.1364/OL.559814","DOIUrl":"https://doi.org/10.1364/OL.559814","url":null,"abstract":"PbS quantum dots (QDs) are excellent infrared semiconductor materials for solution-processed optoelectronic devices. However, poor resistance to moisture, oxygen, and photobleaching cast a shadow over the development of optoelectronic devices based on PbS QDs. Here, we present a strategy for enhancing the stability of PbS QDs through in situ lead halide (PbX2, X = Cl, Br, I) induced facet coupling. The addition of PbX2 ligands has been observed to effectively reduce the Stokes shift of PbS QDs with increasing atomic radius of the halide, suggesting that the PbX2 ligands effectively passivate the surface of the QDs. Further analysis of the morphology and crystal facets of PbS QDs reveals that PbX2 ligands can induce coupling of the (200) crystal facet. Consequently, the surface passivation and coupling of non-polar crystal facets result in the demonstration of robust resistance to moisture, oxygen, and photobleaching by PbS-PbI2 QDs. No notable alterations in the absorption spectrum were discerned following exposure to UV irradiation and prolonged air exposure. Infrared LEDs based on PbS-PbX2 QDs exhibited enhanced current density and achieved a maximum irradiance of 5.06 W sr-1 m-2.This strategy offers a promising solution to the stability issue of infrared nanomaterials and devices.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 11","pages":"3700-3703"},"PeriodicalIF":3.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144187495","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-scan structured illumination microscopy for rapid and efficient volumetric super-resolution imaging. 用于快速高效的体积超分辨率成像的多扫描结构照明显微镜。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.558505

Daozheng Gong, Geneva Anderberg, Chufan Cai, Jing Chen, Patrick J La Rivière, Norbert Scherer

引用次数: 0

Reference-free mode decomposition of few-mode fibers via coherent modulation imaging. 通过相干调制成像的少模光纤的无参考模分解。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.553224

Chunyu Zou, Suhas P Veetil, Na Rong, Zhilong Jiang, Cheng Liu, Jianqiang Zhu

{"title":"Reference-free mode decomposition of few-mode fibers via coherent modulation imaging.","authors":"Chunyu Zou, Suhas P Veetil, Na Rong, Zhilong Jiang, Cheng Liu, Jianqiang Zhu","doi":"10.1364/OL.553224","DOIUrl":"https://doi.org/10.1364/OL.553224","url":null,"abstract":"A comprehensive understanding of fiber modes is critical for the practical application of few-mode fibers (FMFs) in areas such as telecommunications, high-power lasers, and optical imaging. This paper introduces a single-exposure, reference-free method for mode decomposition (MD) of FMFs using coherent modulation imaging (CMI). A key advantage of the proposed method is that it requires only one experimentally captured diffraction pattern to reconstruct the complex amplitude of the optical field and perform MD, thereby eliminating the need for multiple measurements, reference beams, or complex preprocessing. To ensure accurate coordinate alignment, the method employs a simulated annealing mode projection (SAMP) algorithm. The approach achieves robust and complete MD with high precision and computational efficiency, requiring less than 2 s per mode projection analysis. Experimental results demonstrate excellent agreement between the retrieved and synthesized optical fields, with intensity correlation coefficients exceeding 0.985 across various mode distributions. This novel technique, to the best of our knowledge, simplifies experimental setups while maintaining exceptional reliability, offering significant potential for industrial and practical applications of FMFs.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 11","pages":"3648-3651"},"PeriodicalIF":3.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144187527","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

Submilliwatt silicon nitride thermo-optic phase shifter enabled by a dense sinusoidal spiral waveguide. 亚毫瓦氮化硅热光移相器由密集正弦螺旋波导实现。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.562570

Jinjie Zeng, Jiaqi Li, Shuqing Lin, Xiaoqun Yu, Siyuan Yu, Yanfeng Zhang

{"title":"Submilliwatt silicon nitride thermo-optic phase shifter enabled by a dense sinusoidal spiral waveguide.","authors":"Jinjie Zeng, Jiaqi Li, Shuqing Lin, Xiaoqun Yu, Siyuan Yu, Yanfeng Zhang","doi":"10.1364/OL.562570","DOIUrl":"https://doi.org/10.1364/OL.562570","url":null,"abstract":"Silicon nitride (SiNx) is an appealing material for large-scale photonic integrated circuits (PICs) due to its large transparency window, low propagation loss, and CMOS compatibility. Specifically, thermo-optic (TO) phase shifters (PSs) are crucial components for programmable circuits. However, conventional phase shifters based on silicon nitride require high power consumption, which limits their scalability. In this Letter, we experimentally demonstrate a submilliwatt phase shifter enabled by a dense sinusoidal spiral waveguide, two orders of magnitude lower than conventional devices. The dense spiral with multiple folding waveguides effectively absorbs the heat generated from the heater, therefore improving thermal efficiency and reducing power consumption. Meanwhile, waveguide cross talk within the dense spiral is suppressed by utilizing sinusoidal modulation. By further suspending the device, we achieve a submilliwatt power consumption of 0.98 mW/π in a 10-fold device. Additionally, the footprint of our device is 300 × 150 μm2, which is more compact in length compared with conventional designs.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 11","pages":"3768-3771"},"PeriodicalIF":3.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144187533","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

Vortex beam dynamic speckle interference microscopy. 涡旋光束动态散斑干涉显微术。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-06-01 DOI: 10.1364/OL.561464

Hongwei Zou, Shengqiang Zhong, Yili Lu, Kaibin Zeng, Fengzi Ling, Lei Xu, Yuhan Liu, Wenjie Chen, Xiantao Jiang

{"title":"Vortex beam dynamic speckle interference microscopy.","authors":"Hongwei Zou, Shengqiang Zhong, Yili Lu, Kaibin Zeng, Fengzi Ling, Lei Xu, Yuhan Liu, Wenjie Chen, Xiantao Jiang","doi":"10.1364/OL.561464","DOIUrl":"https://doi.org/10.1364/OL.561464","url":null,"abstract":"We proposed vortex beam dynamic speckle interference microscopy (VSIM), a novel, to our knowledge, imaging technique that combines dynamic speckle illumination and common-path phase-shifting interferometry for high-resolution quantitative phase imaging. By exploiting the angular properties of perfect optical vortex beams, VSIM generates a refined speckle pattern, providing clear benefits compared to traditional coherent imaging systems. Experimental validation demonstrates that VSIM improves spatial resolution by 1.39-fold and enhances the signal-to-noise ratio (SNR) from 16.4 dB to 34.3 dB. The proposed method achieved phase modulation between the scattered light from the sample and the unscattered reference light in a robust common-path configuration, which circumvents the stringent requirements of spatial correlation in speckle field interference and effectively mitigates the effects of environmental disturbances.This approach enables high-resolution, noninvasive, and label-free phase retrieval, establishing VSIM as a reliable tool for biomedical imaging, as demonstrated with red blood cells (RBCs) and A549 cells in this paper.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 11","pages":"3676-3679"},"PeriodicalIF":3.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144187546","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