Light-Science & Applications最新文献_第9页

Bright compact ultrabroadband source by orthogonal laser-sustained plasma 通过正交激光维持等离子体实现明亮紧凑的超宽带源

Light-Science & Applications Pub Date : 2024-09-26 DOI: 10.1038/s41377-024-01602-2

Zhaojiang Shi, Shichao Yang, He Hu, Haodong Lei, Zhaohua Yang, Xia Yu

{"title":"Bright compact ultrabroadband source by orthogonal laser-sustained plasma","authors":"Zhaojiang Shi, Shichao Yang, He Hu, Haodong Lei, Zhaohua Yang, Xia Yu","doi":"10.1038/s41377-024-01602-2","DOIUrl":"https://doi.org/10.1038/s41377-024-01602-2","url":null,"abstract":"Laser-sustained plasma (LSP) source featuring high brightness and broadband spectral coverage is found to be powerful in various fields of scientific and industrial applications. However, the fundamental limit of low conversion efficiency constrains the system compactness and widespread applications of such broadband light sources. In this paper, we propose an innovative orthogonal LSP to break through the conversion efficiency limitation. Driven by the elevated conversion efficiency from absorbed laser power to ultraviolet (UV) emission, a compact broadband source (250–1650 nm) with UV spectral radiance exceeding 210 ({mW}/({{mm}}^{2},cdot, {sr},cdot, {nm})) is achieved with >100 W pump laser. With the plot of a two-dimensional refractive index model, we report an important conceptual advance that the orthogonal design eliminates the influence of the negative lensing effect on laser power density. Experimental results unambiguously demonstrate that we achieve a bright compact UV-VIS-NIR source with negligible thermal loss and the highest conversion efficiency to our knowledge. Significant enhancement of 4 dB contrast-to-noise ratio (CNR) in spectral single-pixel imaging has been demonstrated using the proposed ultrabroadband source. By establishing the quantitative link between pumping optics design and plasma absorption, this work presents a compact broadband source that combines superior conversion efficiency and unprecedented brightness, which is essential to high-speed inspection and spectroscopy applications.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142321059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A material change for ultra-high precision force sensing 用于超高精度力传感的材料变化

Light-Science & Applications Pub Date : 2024-09-26 DOI: 10.1038/s41377-024-01626-8

Christopher Perrella, Kishan Dholakia

引用次数: 0

One-dimensional photonic crystal enhancing spin-to-orbital angular momentum conversion for single-particle tracking 用于单粒子跟踪的一维光子晶体可增强自旋与轨道角动量的转换

Light-Science & Applications Pub Date : 2024-09-26 DOI: 10.1038/s41377-024-01623-x

Mingchuan Huang, Qiankun Chen, Yang Liu, Chi Zhang, Rongjin Zhang, Junhua Yuan, Douguo Zhang

{"title":"One-dimensional photonic crystal enhancing spin-to-orbital angular momentum conversion for single-particle tracking","authors":"Mingchuan Huang, Qiankun Chen, Yang Liu, Chi Zhang, Rongjin Zhang, Junhua Yuan, Douguo Zhang","doi":"10.1038/s41377-024-01623-x","DOIUrl":"https://doi.org/10.1038/s41377-024-01623-x","url":null,"abstract":"Single-particle tracking (SPT) is an immensely valuable technique for studying a variety of processes in the life sciences and physics. It can help researchers better understand the positions, paths, and interactions of single objects in systems that are highly dynamic or require imaging over an extended time. Here, we propose an all-dielectric one-dimensional photonic crystal (1D PC) that enhances spin-to-orbital angular momentum conversion for three-dimensional (3D) SPTs. This well-designed 1D PC can work as a substrate for optical microscopy. We introduce this effect into the interferometric scattering (iSCAT) technique, resulting in a double-helix point spread function (DH-PSF). DH-PSF provides more uniform Fisher information for 3D position estimation than the PSFs of conventional microscopy, such as encoding the axial position of a single particle in the angular orientation of DH-PSF lobes, thus providing a means for 3D SPT. This approach can address the challenge of iSCAT in 3D SPT because DH-PSF iSCAT will not experience multiple contrast inversions when a single particle travels along the axial direction. DH-PSF iSCAT microscopy was used to record the 3D trajectory of a single microbead attached to the flagellum, facilitating precise analysis of fluctuations in motor dynamics. Its ability to track single nanoparticles, such as 3D diffusion trajectories of 20 nm gold nanoparticles in glycerol solution, was also demonstrated. The DH-PSF iSCAT technique enabled by a 1D PC holds potential promise for future applications in physical, biological, and chemical science.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142321058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum dots get a bright upgrade 量子点的明亮升级

Light-Science & Applications Pub Date : 2024-09-23 DOI: 10.1038/s41377-024-01593-0

Fei Ding

引用次数: 0

Suppressed concentration quenching and tunable photoluminescence in Eu2+-activated Rb3Y(PO4)2 phosphors for full-spectrum lighting. 用于全光谱照明的 Eu2+ 激活型 Rb3Y(PO4)2 荧光粉中的抑制浓度淬灭和可调光致发光。

Light-Science & Applications Pub Date : 2024-09-20 DOI: 10.1038/s41377-024-01607-x

Ming Zhao,Yeping Ge,Yurong Li,Xiaoyan Song,Zhiguo Xia,Xinping Zhang

{"title":"Suppressed concentration quenching and tunable photoluminescence in Eu2+-activated Rb3Y(PO4)2 phosphors for full-spectrum lighting.","authors":"Ming Zhao,Yeping Ge,Yurong Li,Xiaoyan Song,Zhiguo Xia,Xinping Zhang","doi":"10.1038/s41377-024-01607-x","DOIUrl":"https://doi.org/10.1038/s41377-024-01607-x","url":null,"abstract":"Highly efficient inorganic phosphors are desirable for lighting-emitting diode light sources, and increasing the doping concentration of activators is a common approach for enhancing the photoluminescence quantum yield (PLQY). However, the constraint of concentration quenching poses a great challenge for improving the PLQY. Herein, we propose a fundamental design principle by separating activators and prolonging their distance in Eu2+-activated Rb3Y(PO4)2 phosphors to inhibit concentration quenching, in which different quenching rates are controlled by the Eu distribution at various crystallographic sites. The blue-violet-emitting Rb3Y(PO4)2:xEu (x = 0.1%-15%) phosphors, with the occupation of Rb1, Rb2 and Y sites by Eu2+, exhibit rapid luminescence quenching with optimum external PLQY of 10% due to multi-channel energy migration. Interestingly, as the Eu concentration increases above 20%, Eu2+ prefer to occupy the Rb1 and Y sites with separated polyhedra and large interionic distances, resulting in green emission with suppressed concentration quenching, achieving an improved external PLQY of 41%. Our study provides a unique design perspective for elevating the efficiency of Eu2+-activated phosphors toward high-performance inorganic luminescent materials for full-spectrum lighting.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"23 1","pages":"266"},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric metamaterials with effective self-duality and full-polarization omnidirectional brewster effect. 具有有效自偶性和全极化全向布鲁斯特效应的介质超材料。

Light-Science & Applications Pub Date : 2024-09-20 DOI: 10.1038/s41377-024-01605-z

Hao Luo,Jie Luo,Zhihui Zhang,Chao Wu,Quan Li,Wei Liu,Ruwen Peng,Mu Wang,Hongqiang Li,Yun Lai

引用次数: 0

Observation of nonlinear fractal higher order topological insulator 观测非线性分形高阶拓扑绝缘体

Light-Science & Applications Pub Date : 2024-09-20 DOI: 10.1038/s41377-024-01611-1

Hua Zhong, Victor O. Kompanets, Yiqi Zhang, Yaroslav V. Kartashov, Meng Cao, Yongdong Li, Sergei A. Zhuravitskii, Nikolay N. Skryabin, Ivan V. Dyakonov, Alexander A. Kalinkin, Sergei P. Kulik, Sergey V. Chekalin, Victor N. Zadkov

{"title":"Observation of nonlinear fractal higher order topological insulator","authors":"Hua Zhong, Victor O. Kompanets, Yiqi Zhang, Yaroslav V. Kartashov, Meng Cao, Yongdong Li, Sergei A. Zhuravitskii, Nikolay N. Skryabin, Ivan V. Dyakonov, Alexander A. Kalinkin, Sergei P. Kulik, Sergey V. Chekalin, Victor N. Zadkov","doi":"10.1038/s41377-024-01611-1","DOIUrl":"https://doi.org/10.1038/s41377-024-01611-1","url":null,"abstract":"Higher-order topological insulators (HOTIs) are unique materials hosting topologically protected states, whose dimensionality is at least by 2 lower than that of the bulk. Topological states in such insulators may be strongly confined in their corners which leads to considerable enhancement of nonlinear processes involving such states. However, all nonlinear HOTIs demonstrated so far were built on periodic bulk lattice materials. Here, we demonstrate the first nonlinear photonic HOTI with the fractal origin. Despite their fractional effective dimensionality, the HOTIs constructed here on two different types of the Sierpiński gasket waveguide arrays, may support topological corner states for unexpectedly wide range of coupling strengths, even in parameter regions where conventional HOTIs become trivial. We demonstrate thresholdless spatial solitons bifurcating from corner states in nonlinear fractal HOTIs and show that their localization can be efficiently controlled by the input beam power. We observe sharp differences in nonlinear light localization on outer and multiple inner corners and edges representative for these fractal materials. Our findings not only represent a new paradigm for nonlinear topological insulators, but also open new avenues for potential applications of fractal materials to control the light flow.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical neural networks: progress and challenges. 光学神经网络：进展与挑战。

Light-Science & Applications Pub Date : 2024-09-20 DOI: 10.1038/s41377-024-01590-3

Tingzhao Fu,Jianfa Zhang,Run Sun,Yuyao Huang,Wei Xu,Sigang Yang,Zhihong Zhu,Hongwei Chen

{"title":"Optical neural networks: progress and challenges.","authors":"Tingzhao Fu,Jianfa Zhang,Run Sun,Yuyao Huang,Wei Xu,Sigang Yang,Zhihong Zhu,Hongwei Chen","doi":"10.1038/s41377-024-01590-3","DOIUrl":"https://doi.org/10.1038/s41377-024-01590-3","url":null,"abstract":"Artificial intelligence has prevailed in all trades and professions due to the assistance of big data resources, advanced algorithms, and high-performance electronic hardware. However, conventional computing hardware is inefficient at implementing complex tasks, in large part because the memory and processor in its computing architecture are separated, performing insufficiently in computing speed and energy consumption. In recent years, optical neural networks (ONNs) have made a range of research progress in optical computing due to advantages such as sub-nanosecond latency, low heat dissipation, and high parallelism. ONNs are in prospect to provide support regarding computing speed and energy consumption for the further development of artificial intelligence with a novel computing paradigm. Herein, we first introduce the design method and principle of ONNs based on various optical elements. Then, we successively review the non-integrated ONNs consisting of volume optical components and the integrated ONNs composed of on-chip components. Finally, we summarize and discuss the computational density, nonlinearity, scalability, and practical applications of ONNs, and comment on the challenges and perspectives of the ONNs in the future development trends.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"35 1","pages":"263"},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142273579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rational strategy for power doubling of monolithic multijunction III-V photovoltaics by accommodating attachable scattering waveguides. 通过容纳可附加散射波导实现单片多结 III-V 光电功率倍增的合理策略。

Light-Science & Applications Pub Date : 2024-09-20 DOI: 10.1038/s41377-024-01628-6

Shin Hyung Lee,Hyo Jin Kim,Jae-Hyun Kim,Gwang Yeol Park,Sun-Kyung Kim,Sung-Min Lee

{"title":"Rational strategy for power doubling of monolithic multijunction III-V photovoltaics by accommodating attachable scattering waveguides.","authors":"Shin Hyung Lee,Hyo Jin Kim,Jae-Hyun Kim,Gwang Yeol Park,Sun-Kyung Kim,Sung-Min Lee","doi":"10.1038/s41377-024-01628-6","DOIUrl":"https://doi.org/10.1038/s41377-024-01628-6","url":null,"abstract":"While waveguide-based light concentrators offer significant advantages, their application has not been considered an interesting option for assisting multijunction or other two-terminal tandem solar cells. In this study, we present a simple yet effective approach to enhancing the output power of transfer-printed multijunction InGaP/GaAs solar cells. By utilizing a simply combinable waveguide concentrator featuring a coplanar waveguide with BaSO4 Mie scattering elements, we enable the simultaneous absorption of directly illuminated solar flux and indirectly waveguided flux. The deployment of cells is optimized for front-surface photon collection in monofacial cells. Through systematic comparisons across various waveguide parameters, supported by both experimental and theoretical quantifications, we demonstrate a remarkable improvement in the maximum output power of a 26%-efficient cell, achieving an enhancement of ~93% with the integration of the optimal scattering waveguide. Additionally, a series of supplementary tests are conducted to explore the effective waveguide size, validate enhancements in arrayed cell module performance, and assess the drawbacks associated with rear illumination. These findings provide a comprehensive understanding of our proposed approach towards advancing multi-junction photovoltaics.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"19 1","pages":"261"},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142273573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measuring, processing, and generating partially coherent light with self-configuring optics 利用自配置光学器件测量、处理和生成部分相干光

Light-Science & Applications Pub Date : 2024-09-20 DOI: 10.1038/s41377-024-01622-y

Charles Roques-Carmes, Shanhui Fan, David A. B. Miller

{"title":"Measuring, processing, and generating partially coherent light with self-configuring optics","authors":"Charles Roques-Carmes, Shanhui Fan, David A. B. Miller","doi":"10.1038/s41377-024-01622-y","DOIUrl":"https://doi.org/10.1038/s41377-024-01622-y","url":null,"abstract":"Optical phenomena always display some degree of partial coherence between their respective degrees of freedom. Partial coherence is of particular interest in multimodal systems, where classical and quantum correlations between spatial, polarization, and spectral degrees of freedom can lead to fascinating phenomena (e.g., entanglement) and be leveraged for advanced imaging and sensing modalities (e.g., in hyperspectral, polarization, and ghost imaging). Here, we present a universal method to analyze, process, and generate spatially partially coherent light in multimode systems by using self-configuring optical networks. Our method relies on cascaded self-configuring layers whose average power outputs are sequentially optimized. Once optimized, the network separates the input light into its mutually incoherent components, which is formally equivalent to a diagonalization of the input density matrix. We illustrate our method with numerical simulations of Mach-Zehnder interferometer arrays and show how this method can be used to perform partially coherent environmental light sensing, generation of multimode partially coherent light with arbitrary coherency matrices, and unscrambling of quantum optical mixtures. We provide guidelines for the experimental realization of this method, including the influence of losses, paving the way for self-configuring photonic devices that can automatically learn optimal modal representations of partially coherent light fields.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0