Optics letters最新文献_第6页

Dichroism mapping at terahertz frequencies via polarization-sensitive computational imaging. 通过偏振敏感计算成像在太赫兹频率二色映射。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.566556

Seth N Lowry, Matthew E Reid, Christopher M Collier

引用次数: 0

Enhancement of excitonic absorption in WS₂ mediated by Huygens Si metasurfaces. 惠更斯硅超表面介导WS2中激子吸收的增强。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.562981

Dingwei Chen, Junichi Takahara

引用次数: 0

Intrusion detection-embedded chaotic encryption via hybrid modulation for data center interconnects. 数据中心互连中基于混合调制的嵌入式入侵检测混沌加密。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.566608

Wenjun Zeng, Chongfu Zhang, Xinshuai Liang, Jiebing Xia, Yue Lin, Yiting Lin

引用次数: 0

Limits of nonlinear and dispersive fiber propagation for an optical fiber-based extreme learning machine. 基于光纤的极限学习机的非线性和色散光纤传播极限。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.562186

Andrei V Ermolaev, Mathilde Hary, Lev Leybov, Piotr Ryczkowski, Anas Skalli, Daniel Brunner, Goëry Genty, John M Dudley

引用次数: 0

Size-dependent photon scattering effects in AlGaN-based deep ultraviolet LEDs with varied length-to-width ratios. 不同长宽比下氮化镓基深紫外led的光子散射效应。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565827

Liu Wang, Yuling Wu, Chunshuang Chu, KangKai Tian, Xuecheng Wei, Jianchang Yan, Yonghui Zhang, Zi-Hui Zhang

{"title":"Size-dependent photon scattering effects in AlGaN-based deep ultraviolet LEDs with varied length-to-width ratios.","authors":"Liu Wang, Yuling Wu, Chunshuang Chu, KangKai Tian, Xuecheng Wei, Jianchang Yan, Yonghui Zhang, Zi-Hui Zhang","doi":"10.1364/OL.565827","DOIUrl":"https://doi.org/10.1364/OL.565827","url":null,"abstract":"In this work, we investigate systematically the effect of the mesa L/W ratio on the optical performance of DUV LEDs. The results indicate that as the L/W ratio increases, the large-sized DUV LEDs achieve a higher LEE, whereas the small-sized DUV LEDs exhibit a lower LEE. The abnormal phenomenon can be attributed to the fact that the different scattering mechanisms occur for large and small chips at varying L/W ratios. For large-sized chips, when the L/W ratio increases, the amount of light propagating to the incline sidewall and directly reflected into the escape cone of the bottom out-light plane increases, thereby enhancing the bottom LEE. In addition, the increased sapphire sidewall area leads to more light escaping through the sapphire side, which increases the LEE from the chip side. For small-sized chips, some light escapes from the side of the sapphire at a low L/W ratio. However, when the L/W ratio increases, this portion of the light is directly reflected by the inclined sidewall of the mesa and eventually absorbed by GaN and the top metal, resulting in decreased LEE. These findings can provide essential geometry design principles for DUV LEDs of various sizes.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4270-4273"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541755","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

Symmetric waveguide structure improves the amplified spontaneous emission characteristics of BUBD-1 molecules. 对称波导结构改善了BUBD-1分子的放大自发发射特性。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565291

Chaojun Shi, Meng Liang, Lei Wang, Yunlong Liu, Wenjun Wang, Shuhong Li

引用次数: 0

Co-phase errors simultaneous detection for optical sparse aperture systems via deep learning. 基于深度学习的光学稀疏孔径系统共相误差同步检测。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.562369

Wei Wang, Xiaofang Zhang, Ningjuan Ruan, Jingjing Ge, Zhonghai He

{"title":"Co-phase errors simultaneous detection for optical sparse aperture systems via deep learning.","authors":"Wei Wang, Xiaofang Zhang, Ningjuan Ruan, Jingjing Ge, Zhonghai He","doi":"10.1364/OL.562369","DOIUrl":"https://doi.org/10.1364/OL.562369","url":null,"abstract":"Since the sparse structure of the optical sparse aperture systems, co-phasing is crucial for achieving high resolution. In practice, tip-tilt errors affect the piston error, necessitating step-by-step detection, reducing efficiency, and most existing methods focus on detecting single-type co-phase error. In this Letter, we propose a novel, to the best of our knowledge, piston and tip-tilt errors simultaneous detection method using both the object-independent feature map (FM) related to optical transfer function (OTF) and deep learning. Firstly, we theoretically derived the relationship between the OTF and co-phase errors, demonstrating that tip-tilt errors detection is unaffected by piston error, while obtaining piston error requires prior error separation. Secondly, we employ a separation network to obtain a separated FM containing only piston error from the original FM, thereby eliminating interference from tip-tilt errors and enabling accurate detection. Finally, by integrating the original and separated FMs as inputs to our proposed detection network, piston and tip-tilt errors can be detected simultaneously. Once trained, the networks require only a single original FM input. Simulations demonstrate that our proposed method achieves high detection accuracy and robust performance.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4426-4429"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541694","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 the performance of MgO:PPLN-based optical parametric oscillators with variable-temperature wavelength tuning using a 405 nm laser. 利用405nm激光增强基于MgO: ppln的变温波长调谐光参量振荡器的性能。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.564432

Chongyang Xu, Bangyan Hu, Kun Zhang, Yifan Chen, Hongquan Yao, Bing Wu, Jingyi Ge, Xinjie Lv, Jian Ning, Gang Zhao, Shining Zhu

{"title":"Enhancing the performance of MgO:PPLN-based optical parametric oscillators with variable-temperature wavelength tuning using a 405 nm laser.","authors":"Chongyang Xu, Bangyan Hu, Kun Zhang, Yifan Chen, Hongquan Yao, Bing Wu, Jingyi Ge, Xinjie Lv, Jian Ning, Gang Zhao, Shining Zhu","doi":"10.1364/OL.564432","DOIUrl":"https://doi.org/10.1364/OL.564432","url":null,"abstract":"In this paper, we significantly and comprehensively enhanced the performance of the optical parametric oscillator (OPO) utilizing temperature elevation for precise wavelength adjustment assisted by a 405 nm laser. This approach works because the irradiation of the MgO:PPLN crystal with a 405 nm laser can alleviate the cavity mode mismatch caused by the pyroelectric-induced photorefractive effect in the crystal, thereby improving the performance of the OPO. The linewidths of the signal and idler light have been narrowed, exhibiting a small spectral bandwidth. The beam quality of the signal light has been significantly improved. The root mean square power fluctuation of the idler light has been reduced to below 1%, and the conversion efficiency has also increased to varying degrees. These results indicate a comprehensive enhancement of the OPO performance. This type of OPO, which maintains high robustness after precise wavelength tuning, is expected to find widespread applications in areas such as gas detection, photocatalysis, and communications.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4462-4465"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541705","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

Field-induced 1D/2D switchable grating based on a polymer-dispersed liquid crystal. 基于聚合物分散液晶的场致1D/2D可切换光栅。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.566920

Hao Cheng, Ruolong Lin, Ran An, Jiaxuan Wang, Yuting Ren, Shilong Li, Xiangming Kong, Xuesong Duan, Hongyu Xing, Wenjiang Ye

引用次数: 0

Generation of photon pairs through spontaneous four-wave mixing in subwavelength nonlinear films. 亚波长非线性薄膜中自发四波混频产生光子对。

IF 3.1 2区物理与天体物理

Optics letters Pub Date : 2025-07-01 DOI: 10.1364/OL.565864

Changjin Son, Samuel Peana, Owen Matthiessen, Artem Kryvobok, Alexander Senichev, Alexandra Boltasseva, Vladimir M Shalaev, Maria Chekhova

{"title":"Generation of photon pairs through spontaneous four-wave mixing in subwavelength nonlinear films.","authors":"Changjin Son, Samuel Peana, Owen Matthiessen, Artem Kryvobok, Alexander Senichev, Alexandra Boltasseva, Vladimir M Shalaev, Maria Chekhova","doi":"10.1364/OL.565864","DOIUrl":"https://doi.org/10.1364/OL.565864","url":null,"abstract":"Pairs of entangled photons are crucial for photonic quantum technologies. The demand for integrability and multi-functionality suggests \"flat\" platforms-ultrathin layers and metasurfaces-as sources of photon pairs. Despite the success in the demonstration of spontaneous parametric downconversion (SPDC) from such sources, there are almost no works on spontaneous four-wave mixing (SFWM)-an alternative process to generate photon pairs. Meanwhile, SFWM can be implemented in any nanostructures, including ones made of isotropic materials, which are easier to fabricate than crystalline SPDC sources. Here, we investigate photon pair generation through SFWM in subwavelength films of amorphous silicon nitride (SiN) with varying nitrogen content. For all samples, we demonstrate two-photon quantum correlations, indicated by the normalized second-order correlation function g(2)(0): it exceeds 2 and decays as the pump power increases. By observing two-photon interference between SFWM from the SiN films and the fused silica (FS) substrate, we find the third-order susceptibilities of films with different nitrogen content.","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4434-4437"},"PeriodicalIF":3.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144541714","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