Pub Date : 2023-01-01DOI: 10.29026/oea.2023.230154
Tingzhu Wu, Shouqiang Lai, Zhong Chen, Hao-Chung Kuo
Deep-ultraviolet (DUV) sterilization technology using DUV-LEDs has attracted considerable attention owing to its portability, eco-friendliness, high potency, and broad-spectrum sterilization. This study compiles the developments of recent DUV sterilization research. Recent works have investigated DUV sterilization from the perspective of device improvement and principle investigation: one employed a novel epitaxial structure to optimize the performance and fabrication cost of DUV-LEDs and realized potent virus disinfection effects for various respiratory RNA viruses, and another work explained the disinfection phenomenon of SARS-CoV-2 and its variants (Delta and Omicron) in a cryogenic environment. These studies have contributed significantly to the development of DUV sterilization.
{"title":"Recent developments in deep-ultraviolet sterilization of human respiratory RNA viruses","authors":"Tingzhu Wu, Shouqiang Lai, Zhong Chen, Hao-Chung Kuo","doi":"10.29026/oea.2023.230154","DOIUrl":"https://doi.org/10.29026/oea.2023.230154","url":null,"abstract":"Deep-ultraviolet (DUV) sterilization technology using DUV-LEDs has attracted considerable attention owing to its portability, eco-friendliness, high potency, and broad-spectrum sterilization. This study compiles the developments of recent DUV sterilization research. Recent works have investigated DUV sterilization from the perspective of device improvement and principle investigation: one employed a novel epitaxial structure to optimize the performance and fabrication cost of DUV-LEDs and realized potent virus disinfection effects for various respiratory RNA viruses, and another work explained the disinfection phenomenon of SARS-CoV-2 and its variants (Delta and Omicron) in a cryogenic environment. These studies have contributed significantly to the development of DUV sterilization.","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135800077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
Pub Date : 2023-01-01DOI: 10.29026/oea.2023.220030
Yiwei Xie, Shihan Hong, Hao Yan, C. Zhang, Long Zhang, L. Zhuang, D. Dai
Schematic of an on-chip optical signal processor. Credit: Compuscript Ltd
片上光信号处理器原理图。Credit: Compuscript Ltd
{"title":"Low-loss chip-scale programmable silicon photonic processor","authors":"Yiwei Xie, Shihan Hong, Hao Yan, C. Zhang, Long Zhang, L. Zhuang, D. Dai","doi":"10.29026/oea.2023.220030","DOIUrl":"https://doi.org/10.29026/oea.2023.220030","url":null,"abstract":"Schematic of an on-chip optical signal processor. Credit: Compuscript Ltd","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":"1 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69520720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
Pub Date : 2023-01-01DOI: 10.29026/oea.2023.230022
Jr-hau He
{"title":"High-performance warm white LED based on thermally stable all inorganic perovskite quantum dots","authors":"Jr-hau He","doi":"10.29026/oea.2023.230022","DOIUrl":"https://doi.org/10.29026/oea.2023.230022","url":null,"abstract":"","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":"1 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69523558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
Metalenses have gained significant attention and have been widely utilized in optical systems for focusing and imaging, owing to their lightweight, high-integration, and exceptional-flexibility capabilities. Traditional design methods neglect the coupling effect between adjacent meta-atoms, thus harming the practical performance of meta-devices. The existing physical/data-driven optimization algorithms can solve the above problems, but bring significant time costs or require a large number of data-sets. Here, we propose a physics-data-driven method employing an “intelligent optimizer” that enables us to adaptively modify the sizes of the meta-atom according to the sizes of its surrounding ones. The implementation of such a scheme effectively mitigates the undesired impact of local lattice coupling, and the proposed network model works well on thousands of data-sets with a validation loss of 3×10−3. Based on the “intelligent optimizer”, a 1-cm-diameter metalens is designed within 3 hours, and the experimental results show that the 1-mm-diameter metalens has a relative focusing efficiency of 93.4% (compared to the ideal focusing efficiency) and a Strehl ratio of 0.94. Compared to previous inverse design method, our method significantly boosts designing efficiency with five orders of magnitude reduction in time. More generally, it may set a new paradigm for devising large-aperture meta-devices.
{"title":"Physics-data-driven intelligent optimization for large-aperture metalenses","authors":"Yingli Ha, Yu Luo, Mingbo Pu, Fei Zhang, Qiong He, Jinjin Jin, Mingfeng Xu, Yinghui Guo, Xiaogang Li, Xiong Li, Xiaoliang Ma, Xiangang Luo","doi":"10.29026/oea.2023.230133","DOIUrl":"https://doi.org/10.29026/oea.2023.230133","url":null,"abstract":"Metalenses have gained significant attention and have been widely utilized in optical systems for focusing and imaging, owing to their lightweight, high-integration, and exceptional-flexibility capabilities. Traditional design methods neglect the coupling effect between adjacent meta-atoms, thus harming the practical performance of meta-devices. The existing physical/data-driven optimization algorithms can solve the above problems, but bring significant time costs or require a large number of data-sets. Here, we propose a physics-data-driven method employing an “intelligent optimizer” that enables us to adaptively modify the sizes of the meta-atom according to the sizes of its surrounding ones. The implementation of such a scheme effectively mitigates the undesired impact of local lattice coupling, and the proposed network model works well on thousands of data-sets with a validation loss of 3×10<sup>−3</sup>. Based on the “intelligent optimizer”, a 1-cm-diameter metalens is designed within 3 hours, and the experimental results show that the 1-mm-diameter metalens has a relative focusing efficiency of 93.4% (compared to the ideal focusing efficiency) and a Strehl ratio of 0.94. Compared to previous inverse design method, our method significantly boosts designing efficiency with five orders of magnitude reduction in time. More generally, it may set a new paradigm for devising large-aperture meta-devices.","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135662657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
Pub Date : 2023-01-01DOI: 10.29026/oea.2023.220073
Yijia Huang, Tianxiao Xiao, Shuai Chen, Zheng-wei Xie, Jie Zheng, Jianqi Zhu, Yarong Su, Wei-dong Chen, Ke Liu, Ming-jun Tang, P. Müller‐Buschbaum, Ling Li
{"title":"All-optical controlled-NOT logic gate achieving directional asymmetric transmission based on metasurface doublet","authors":"Yijia Huang, Tianxiao Xiao, Shuai Chen, Zheng-wei Xie, Jie Zheng, Jianqi Zhu, Yarong Su, Wei-dong Chen, Ke Liu, Ming-jun Tang, P. Müller‐Buschbaum, Ling Li","doi":"10.29026/oea.2023.220073","DOIUrl":"https://doi.org/10.29026/oea.2023.220073","url":null,"abstract":"","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":"1 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69521382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
Pub Date : 2023-01-01DOI: 10.29026/oea.2023.230063
Yunjiang Rao
Background Since the phase-sensitive optical time-domain reflectometry (Ф-OTDR) concept was proposed in 19931, ФOTDR has undergone rapid development and extensive studies. The first practical DVS system based on Ф-OTDR was demonstrated with a powerful narrow linewidth laser in 20082. Ф-OTDR is capable of covering long measurement range while maintaining high sensitivity and spatial resolution along the sensing fiber3,4. Based on this, researchers have made great effort on Ф-OTDR sensing performance improvement, including sensing distance, sensitivity, spatial resolution, frequency response range, event recognition accuracy, etc. Based on its superior long-distance and high-resolution distributed vibration/acoustic sensing capabilities, Ф-OTDR technology has been widely used in earthquake monitoring, oil and gas resource exploration, pipeline leak detection, perimeter intrusion monitoring, cable partial discharge detection and other fields with a large number of successful application demonstrations. In the recent work5 entitled "Advances in phase-sensitive optical time-domain reflectometry" published in Opto-Electronic Advances, DOI: 10.29026/oea.2022. 200078, Prof. Liyang Shao et al. present in detail the research progress and applications of DVS/DAS technology based Φ-OTDR. This article was selected as the back cover paper of Volume 3, Issue 5 of OEA in 2022, and was recently selected as a highly cited paper by Web of Science.
自相敏光学时域反射计(Ф-OTDR)概念于19931年提出以来，ФOTDR得到了迅速的发展和广泛的研究。第一个实用的基于Ф-OTDR的分布式交换机系统在2008年用一个强大的窄线宽激光器进行了演示。Ф-OTDR能够覆盖较长的测量范围，同时保持沿传感光纤3,4的高灵敏度和空间分辨率。基于此，研究者在Ф-OTDR传感性能提升方面做了大量工作，包括传感距离、灵敏度、空间分辨率、频响范围、事件识别精度等。Ф-OTDR技术基于其优越的远距离、高分辨率分布式振动/声传感能力，已广泛应用于地震监测、油气资源勘探、管道泄漏检测、周界侵入监测、电缆局部放电检测等领域，并取得了大量成功的应用示范。在最近发表在《光电进展》杂志上的题为“相敏光学时域反射法的进展”的工作中，DOI: 10.29026/oea.2022。20078，邵立阳教授等详细介绍了基于Φ-OTDR的DVS/DAS技术的研究进展及应用。这篇文章被选为OEA 2022年第5期第3卷封底论文，最近被Web of Science选为高被引论文。
{"title":"The cornerstone of fiber-optic distributed vibration/acoustic sensing: Ф-OTDR","authors":"Yunjiang Rao","doi":"10.29026/oea.2023.230063","DOIUrl":"https://doi.org/10.29026/oea.2023.230063","url":null,"abstract":"Background Since the phase-sensitive optical time-domain reflectometry (Ф-OTDR) concept was proposed in 19931, ФOTDR has undergone rapid development and extensive studies. The first practical DVS system based on Ф-OTDR was demonstrated with a powerful narrow linewidth laser in 20082. Ф-OTDR is capable of covering long measurement range while maintaining high sensitivity and spatial resolution along the sensing fiber3,4. Based on this, researchers have made great effort on Ф-OTDR sensing performance improvement, including sensing distance, sensitivity, spatial resolution, frequency response range, event recognition accuracy, etc. Based on its superior long-distance and high-resolution distributed vibration/acoustic sensing capabilities, Ф-OTDR technology has been widely used in earthquake monitoring, oil and gas resource exploration, pipeline leak detection, perimeter intrusion monitoring, cable partial discharge detection and other fields with a large number of successful application demonstrations. In the recent work5 entitled \"Advances in phase-sensitive optical time-domain reflectometry\" published in Opto-Electronic Advances, DOI: 10.29026/oea.2022. 200078, Prof. Liyang Shao et al. present in detail the research progress and applications of DVS/DAS technology based Φ-OTDR. This article was selected as the back cover paper of Volume 3, Issue 5 of OEA in 2022, and was recently selected as a highly cited paper by Web of Science.","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":"1 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69524183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
High resolution imaging is achieved using increasingly larger apertures and successively shorter wavelengths. Optical aperture synthesis is an important high-resolution imaging technology used in astronomy. Conventional long baseline amplitude interferometry is susceptible to uncontrollable phase fluctuations, and the technical difficulty increases rapidly as the wavelength decreases. The intensity interferometry inspired by HBT experiment is essentially insensitive to phase fluctuations, but suffers from a narrow spectral bandwidth which results in a lack of detection sensitivity. In this study, we propose optical synthetic aperture imaging based on spatial intensity interferometry. This not only realizes diffraction-limited optical aperture synthesis in a single shot, but also enables imaging with a wide spectral bandwidth. And this method is insensitive to the optical path difference between the sub-apertures. Simulations and experiments present optical aperture synthesis diffraction-limited imaging through spatial intensity interferometry in a 100 $nm$ spectral width of visible light, whose maximum optical path difference between the sub-apertures reach $69.36lambda$. This technique is expected to provide a solution for optical aperture synthesis over kilometer-long baselines at optical wavelengths.
{"title":"Wide-spectrum optical synthetic aperture imaging via spatial intensity interferometry","authors":"Chunyan Chu, Zhentao Liu, Mingliang Chen, Xuehui Shao, Yuejin Zhao, Shensheng Han","doi":"10.29026/oea.2023.230017","DOIUrl":"https://doi.org/10.29026/oea.2023.230017","url":null,"abstract":"High resolution imaging is achieved using increasingly larger apertures and successively shorter wavelengths. Optical aperture synthesis is an important high-resolution imaging technology used in astronomy. Conventional long baseline amplitude interferometry is susceptible to uncontrollable phase fluctuations, and the technical difficulty increases rapidly as the wavelength decreases. The intensity interferometry inspired by HBT experiment is essentially insensitive to phase fluctuations, but suffers from a narrow spectral bandwidth which results in a lack of detection sensitivity. In this study, we propose optical synthetic aperture imaging based on spatial intensity interferometry. This not only realizes diffraction-limited optical aperture synthesis in a single shot, but also enables imaging with a wide spectral bandwidth. And this method is insensitive to the optical path difference between the sub-apertures. Simulations and experiments present optical aperture synthesis diffraction-limited imaging through spatial intensity interferometry in a 100 $nm$ spectral width of visible light, whose maximum optical path difference between the sub-apertures reach $69.36lambda$. This technique is expected to provide a solution for optical aperture synthesis over kilometer-long baselines at optical wavelengths.","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":"1 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2022-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45984515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
Pub Date : 2022-06-16DOI: 10.29026/oea.2021.200030
C. Fang, Qiyu Yang, Qingchen Yuan, Xuetao Gan, Jianlin Zhao, Yao Shao, Y. Liu, G. Han, Y. Hao
The realization of high- Q resonances in a silicon metasurface with various broken-symmetry blocks is reported. Theoretical analysis reveals that the sharp resonances in the metasurfaces originate from symmetry-protected bound in the continuum (BIC) and the magnetic dipole dominates these peculiar states. A smaller size of the defect in the broken-sym-metry block gives rise to the resonance with a larger Q factor. Importantly, this relationship can be tuned by changing the structural parameter, resulting from the modulation of the topological configuration of BICs. Consequently, a Q factor of more than 3,000 can be easily achieved by optimizing dimensions of the nanostructure. At this sharp resonance, the intensity of the third harmonic generation signal in the patterned structure can be 368 times larger than that of the flat silicon film. The proposed strategy and underlying theory can open up new avenues to realize ultrasharp resonances, which may promote the development of the potential meta-devices for nonlinearity, lasing action, and sensing. High- Q resonances governed by the quasi-bound states in the continuum in all-dielectric metasurfaces. Opto-Electron
{"title":"High-Q resonances governed by the quasi-bound states in the continuum in all-dielectric metasurfaces","authors":"C. Fang, Qiyu Yang, Qingchen Yuan, Xuetao Gan, Jianlin Zhao, Yao Shao, Y. Liu, G. Han, Y. Hao","doi":"10.29026/oea.2021.200030","DOIUrl":"https://doi.org/10.29026/oea.2021.200030","url":null,"abstract":"The realization of high- Q resonances in a silicon metasurface with various broken-symmetry blocks is reported. Theoretical analysis reveals that the sharp resonances in the metasurfaces originate from symmetry-protected bound in the continuum (BIC) and the magnetic dipole dominates these peculiar states. A smaller size of the defect in the broken-sym-metry block gives rise to the resonance with a larger Q factor. Importantly, this relationship can be tuned by changing the structural parameter, resulting from the modulation of the topological configuration of BICs. Consequently, a Q factor of more than 3,000 can be easily achieved by optimizing dimensions of the nanostructure. At this sharp resonance, the intensity of the third harmonic generation signal in the patterned structure can be 368 times larger than that of the flat silicon film. The proposed strategy and underlying theory can open up new avenues to realize ultrasharp resonances, which may promote the development of the potential meta-devices for nonlinearity, lasing action, and sensing. High- Q resonances governed by the quasi-bound states in the continuum in all-dielectric metasurfaces. Opto-Electron","PeriodicalId":19611,"journal":{"name":"Opto-Electronic Advances","volume":" ","pages":""},"PeriodicalIF":14.1,"publicationDate":"2022-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48487220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
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