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Recent developments in deep-ultraviolet sterilization of human respiratory RNA viruses 人类呼吸道RNA病毒的深紫外杀菌研究进展
1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 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.
使用DUV- led的深紫外(DUV)杀菌技术因其便携性、环保性、高效能和广谱杀菌而受到广泛关注。本研究汇编了最近DUV灭菌研究的进展。最近的研究从器件改进和原理研究的角度对DUV灭菌进行了研究:一项研究采用新型外延结构优化DUV- leds的性能和制造成本,实现了对多种呼吸道RNA病毒的强效病毒消毒效果;另一项研究解释了SARS-CoV-2及其变体(Delta和Omicron)在低温环境下的消毒现象。这些研究对DUV灭菌的发展作出了重大贡献。
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引用次数: 0
Low-loss chip-scale programmable silicon photonic processor 低损耗芯片级可编程硅光子处理器
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 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
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引用次数: 3
Time-sequential color code division multiplexing holographic display with metasurface 具有超表面的时间顺序彩色码分多路全息显示
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.29026/oea.2023.220060
Xin Li, Qinmiao Chen, Xue Zhang, R. Zhao, S. Xiao, Yongtian Wang, Lingling Huang
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引用次数: 9
High-performance warm white LED based on thermally stable all inorganic perovskite quantum dots 基于热稳定的全无机钙钛矿量子点的高性能暖白光LED
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.29026/oea.2023.230022
Jr-hau He
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引用次数: 0
Artificial intelligence-assisted chiral nanophotonic designs 人工智能辅助手性纳米光子设计
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.29026/oea.2023.230057
Xuanru Zhang, T. Cui
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引用次数: 0
Physics-data-driven intelligent optimization for large-aperture metalenses 大口径超透镜物理数据驱动的智能优化
1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 10.29026/oea.2023.230133
Yingli Ha, Yu Luo, Mingbo Pu, Fei Zhang, Qiong He, Jinjin Jin, Mingfeng Xu, Yinghui Guo, Xiaogang Li, Xiong Li, Xiaoliang Ma, Xiangang Luo
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.
超透镜由于其轻量化、高集成度和优异的灵活性,在光学聚焦和成像系统中得到了广泛的应用。传统的设计方法忽略了相邻元原子之间的耦合效应,从而影响了元器件的实际性能。现有的物理/数据驱动优化算法可以解决上述问题,但会带来显著的时间成本或需要大量的数据集。在这里,我们提出了一种物理数据驱动的方法,采用“智能优化器”,使我们能够根据其周围原子的大小自适应地修改元原子的大小。这种方案的实现有效地减轻了局部晶格耦合的不良影响,并且所提出的网络模型在数千个数据集上运行良好,验证损失为3×10−3。基于“智能优化器”,在3小时内设计出直径为1 cm的超透镜,实验结果表明,直径为1 mm的超透镜的相对聚焦效率为93.4%(与理想聚焦效率相比),Strehl比为0.94。与以往的反设计方法相比,该方法显著提高了设计效率,设计时间缩短了5个数量级。更广泛地说,它可能为设计大口径元器件设定一个新的范例。
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引用次数: 0
All-optical controlled-NOT logic gate achieving directional asymmetric transmission based on metasurface doublet 基于超表面双偶线实现定向非对称传输的全光控制非逻辑门
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 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
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引用次数: 14
The cornerstone of fiber-optic distributed vibration/acoustic sensing: Ф-OTDR 光纤分布式振动/声学传感的基石:Ф-OTDR
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2023-01-01 DOI: 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。
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引用次数: 0
Wide-spectrum optical synthetic aperture imaging via spatial intensity interferometry 基于空间强度干涉法的广谱光学合成孔径成像
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2022-12-02 DOI: 10.29026/oea.2023.230017
Chunyan Chu, Zhentao Liu, Mingliang Chen, Xuehui Shao, Yuejin Zhao, Shensheng Han
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.
使用越来越大的孔径和越来越短的波长来实现高分辨率成像。光学孔径合成是天文学中一项重要的高分辨率成像技术。传统的长基线振幅干涉测量容易受到不可控的相位波动的影响,并且随着波长的减小,技术难度迅速增加。受HBT实验启发的强度干涉测量基本上对相位波动不敏感,但频谱带宽较窄,导致检测灵敏度不足。在这项研究中,我们提出了基于空间强度干涉的光学合成孔径成像。这不仅实现了单次拍摄的衍射限制光学孔径合成,而且实现了宽光谱带宽的成像。该方法对子孔径之间的光程差不敏感。仿真和实验表明,在可见光光谱宽度为100 nm的情况下,通过空间强度干涉法实现了光学孔径合成衍射限制成像,其子孔径之间的最大光程差达到了69.36lambda$。这项技术有望为光学波长下超过一公里长的基线的光学孔径合成提供解决方案。
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引用次数: 0
High-Q resonances governed by the quasi-bound states in the continuum in all-dielectric metasurfaces 全介电超表面中由准束缚态控制的高q共振
IF 14.1 1区 物理与天体物理 Q1 Engineering Pub Date : 2022-06-16 DOI: 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
报道了在具有各种破坏对称块的硅超表面中实现高Q谐振。理论分析表明,超表面中的尖锐共振源于连续体中受对称保护的束缚(BIC),磁偶极子支配着这些特殊的状态。断裂对称块中的缺陷尺寸越小,则产生具有较大Q因子的谐振。重要的是,这种关系可以通过改变结构参数来调整,这是由BIC拓扑配置的调制引起的。因此,通过优化纳米结构的尺寸,可以容易地实现大于3000的Q因子。在这种尖锐的谐振下,图案化结构中的三次谐波产生信号的强度可以是平坦硅膜的368倍。所提出的策略和基本理论可以为实现超尖锐共振开辟新的途径,这可能会促进潜在的非线性、激光作用和传感元器件的发展。所有介电超表面中的准束缚态控制着高Q谐振。光电子
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引用次数: 47
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Opto-Electronic Advances
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