Pub Date : 2024-11-01 DOI: 10.1088/2058-6272/ad718b

Dejie WEI, 德杰尉, Jianwen WU (武建文), Liying ZHU and 立颖朱

{"title":"Study on plasma expansion model of primary discharge on spacecraft solar array","authors":"Dejie WEI, 德杰尉, Jianwen WU (武建文), Liying ZHU and 立颖朱","doi":"10.1088/2058-6272/ad718b","DOIUrl":"https://doi.org/10.1088/2058-6272/ad718b","url":null,"abstract":"In the space plasma environment, primary discharge may occur on the solar array and evolve into a destructive sustained arc, which threatens the safe operation of the spacecraft. Based on the plasma expansion fluid theory, a new multicomponent plasma expansion model is proposed in this study, which takes into account the effects of ion species, ion number, initial discharge current, and Low Earth Orbit (LEO) plasma environment. The expansion simulation of single-component and multicomponent ions is carried out respectively, and the variations of plasma number density, expansion distance, and speed during the expansion process are obtained. Compared with the experimental results, the evolution of propagation distance and speed is closed and the error is within a reasonable range, which verifies the validity and rationality of the model. The propagation characteristics of the primary discharge on the solar array surface and the influence of the initial value on the maximum propagation distance and the propagation current peaks are investigated. This study can provide important theoretical support for the propagation and evolution of the primary discharge and the key behavior of the transition to secondary discharge on spacecraft solar array.","PeriodicalId":20227,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265082","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

Structured light analogy of quantum squeezed states 量子挤压态的结构光类比

Light-Science & Applications Pub Date : 2024-10-21 DOI: 10.1038/s41377-024-01631-x

Zhaoyang Wang, Ziyu Zhan, Anton N. Vetlugin, Jun-Yu Ou, Qiang Liu, Yijie Shen, Xing Fu

{"title":"Structured light analogy of quantum squeezed states","authors":"Zhaoyang Wang, Ziyu Zhan, Anton N. Vetlugin, Jun-Yu Ou, Qiang Liu, Yijie Shen, Xing Fu","doi":"10.1038/s41377-024-01631-x","DOIUrl":"https://doi.org/10.1038/s41377-024-01631-x","url":null,"abstract":"Quantum optics has advanced our understanding of the nature of light and enabled applications far beyond what is possible with classical light. The unique capabilities of quantum light have inspired the migration of some conceptual ideas to the realm of classical optics, focusing on replicating and exploiting non-trivial quantum states of discrete-variable systems. Here, we further develop this paradigm by building the analogy of quantum squeezed states using classical structured light. We have found that the mechanism of squeezing, responsible for beating the standard quantum limit in quantum optics, allows for overcoming the “standard spatial limit” in classical optics: the light beam can be “squeezed” along one of the transverse directions in real space (at the expense of its enlargement along the orthogonal direction), where its width becomes smaller than that of the corresponding fundamental Gaussian mode. We show that classical squeezing enables nearly sub-diffraction and superoscillatory light focusing, which is also accompanied by the nanoscale phase gradient of the size in the order of λ/100 (λ/1000), demonstrated in the experiment (simulations). Crucially, the squeezing mechanism allows for continuous tuning of both features by varying the squeezing parameter, thus providing distinctive flexibility for optical microscopy and metrology beyond the diffraction limit and suggesting further exploration of classical analogies of quantum effects.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142451594","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

Direct phase measurement of waveguides with a next generation optical vector spectrum analyzer 利用下一代光矢量频谱分析仪直接测量波导的相位

Light-Science & Applications Pub Date : 2024-10-19 DOI: 10.1038/s41377-024-01574-3

Andrew Grieco

引用次数: 0

Multi-particle quantum walks on 3D integrated photonic chip 三维集成光子芯片上的多粒子量子行走

Light-Science & Applications Pub Date : 2024-10-19 DOI: 10.1038/s41377-024-01627-7

Wen-Hao Zhou, Xiao-Wei Wang, Ruo-Jing Ren, Yu-Xuan Fu, Yi-Jun Chang, Xiao-Yun Xu, Hao Tang, Xian-Min Jin

{"title":"Multi-particle quantum walks on 3D integrated photonic chip","authors":"Wen-Hao Zhou, Xiao-Wei Wang, Ruo-Jing Ren, Yu-Xuan Fu, Yi-Jun Chang, Xiao-Yun Xu, Hao Tang, Xian-Min Jin","doi":"10.1038/s41377-024-01627-7","DOIUrl":"https://doi.org/10.1038/s41377-024-01627-7","url":null,"abstract":"Quantum walks provide a speed-up in computational power for various quantum algorithms and serve as inspiration for the construction of complex graph representations. Many pioneering works have been dedicated to expanding the experimental state space and the complexity of graphs. However, these experiments are mostly limited to small experimental scale, which do not reach a many-body level and fail to reflect the multi-particle quantum interference effects among non-adjacent modes. Here, we present a quantum walk with three photons on a two-dimensional triangular lattice, which is mapped to a 19 × 19 × 19 high-dimensional state space and constructs a complex graph with 6859 nodes and 45,486 edges. By utilizing the statistical signatures of the output combinations and incorporating machine learning techniques, we successfully validate the nonclassical properties of the experiment. Our implementation provides a paradigm for exponentially expanding the state space and graph complexity of quantum walks, paving the way for surmounting the classical regime in large-scale quantum simulations.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142449517","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

4.8-μm CO-filled hollow-core silica fiber light source 4.8 微米 CO 填充中空芯硅光纤光源

Light-Science & Applications Pub Date : 2024-10-18 DOI: 10.1038/s41377-024-01615-x

Xuanxi Li, Linyong Yang, Zhiyue Zhou, Zhixian Li, Hao Li, Wenxi Pei, Wei Huang, Jing Shi, Luohao Lei, Meng Wang, Zefeng Wang

{"title":"4.8-μm CO-filled hollow-core silica fiber light source","authors":"Xuanxi Li, Linyong Yang, Zhiyue Zhou, Zhixian Li, Hao Li, Wenxi Pei, Wei Huang, Jing Shi, Luohao Lei, Meng Wang, Zefeng Wang","doi":"10.1038/s41377-024-01615-x","DOIUrl":"https://doi.org/10.1038/s41377-024-01615-x","url":null,"abstract":"Mid-infrared (MIR) fiber lasers are important for a wide range of applications in sensing, spectroscopy, imaging, defense, and security. Some progress has been made in the research of MIR fiber lasers based on soft glass fibers, however, the emission range of rare-earth ions and the robustness of the host materials are still a major challenge for MIR fiber lasers. The large number of gases provide a variety of optical transitions in the MIR band. When combined with recent advances in low-loss hollow-core fiber (HCF), there is a great opportunity for gas-filled fiber lasers to further extend the radiation to the MIR region. Here, a 4.8-μm CO-filled silica-based HCF laser is reported for the first time. This is enabled by an in-house manufactured broadband low-loss HCF with a measured loss of 1.81 dB/m at 4.8 μm. A maximum MIR output power of 46 mW and a tuning range of 180 nm (from 4644 to 4824 nm) are obtained by using an advanced 2.33-μm narrow-linewidth fiber laser. This demonstration represents the longest-wavelength silica-based fiber laser to date, while the absorption loss of bulk silica at 4824 nm is up to 13, 000 dB/m. Further wavelength expansion could be achieved by changing the pump absorption line and optimizing the laser structure.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142448314","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

Generation of squeezed vacuum state in the millihertz frequency band 在毫赫兹频段产生挤压真空状态

Light-Science & Applications Pub Date : 2024-10-17 DOI: 10.1038/s41377-024-01606-y

Li Gao, Li-ang Zheng, Bo Lu, Shaoping Shi, Long Tian, Yaohui Zheng

引用次数: 0

Continuous-variable quantum passive optical network 连续可变量子无源光网络

Light-Science & Applications Pub Date : 2024-10-16 DOI: 10.1038/s41377-024-01633-9

Adnan A. E. Hajomer, Ivan Derkach, Radim Filip, Ulrik L. Andersen, Vladyslav C. Usenko, Tobias Gehring

{"title":"Continuous-variable quantum passive optical network","authors":"Adnan A. E. Hajomer, Ivan Derkach, Radim Filip, Ulrik L. Andersen, Vladyslav C. Usenko, Tobias Gehring","doi":"10.1038/s41377-024-01633-9","DOIUrl":"https://doi.org/10.1038/s41377-024-01633-9","url":null,"abstract":"To establish a scalable and secure quantum network, a critical milestone is advancing from basic point-to-point quantum key distribution (QKD) systems to the development of inherently multi-user protocols designed to maximize network capacity. Here, we propose a quantum passive optical network (QPON) protocol based on continuous-variable (CV) systems, particularly the quadrature of the coherent state, which enables deterministic, simultaneous, and high-rate secret key generation among all network users. We implement two protocols with different trust levels assigned to the network users and experimentally demonstrate key generation in a quantum access network with 8 users, each with an 11 km span of access link. Depending on the trust assumptions about the users, we reach 1.5 and 2.1 Mbits/s of total network key generation (or 0.4 and 1.0 Mbits/s with finite-size channels estimation). Demonstrating the potential to expand the network’s capacity to accommodate tens of users at a high rate, our CV-QPON protocols open up new possibilities in establishing low-cost, high-rate, and scalable secure quantum access networks serving as a stepping stone towards a quantum internet.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142439379","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

Tandem light-emitting technology accelerates the commercial application of perovskite LEDs 串联发光技术加速了过氧化物发光二极管的商业应用

Light-Science & Applications Pub Date : 2024-10-16 DOI: 10.1038/s41377-024-01624-w

Xiang Zhang, Jiajun Luo, Enguo Chen, Abd. Rashid bin Mohd Yusoff

引用次数: 0

InGaP χ(2) integrated photonics platform for broadband, ultra-efficient nonlinear conversion and entangled photon generation 用于宽带、超高效非线性转换和纠缠光子生成的 InGaP χ(2) 集成光子学平台

Light-Science & Applications Pub Date : 2024-10-15 DOI: 10.1038/s41377-024-01653-5

Joshua Akin, Yunlei Zhao, Yuvraj Misra, A. K. M. Naziul Haque, Kejie Fang

{"title":"InGaP χ(2) integrated photonics platform for broadband, ultra-efficient nonlinear conversion and entangled photon generation","authors":"Joshua Akin, Yunlei Zhao, Yuvraj Misra, A. K. M. Naziul Haque, Kejie Fang","doi":"10.1038/s41377-024-01653-5","DOIUrl":"https://doi.org/10.1038/s41377-024-01653-5","url":null,"abstract":"Nonlinear optics plays an important role in many areas of science and technology. The advance of nonlinear optics is empowered by the discovery and utilization of materials with growing optical nonlinearity. Here we demonstrate an indium gallium phosphide (InGaP) integrated photonics platform for broadband, ultra-efficient second-order nonlinear optics. The InGaP nanophotonic waveguide enables second-harmonic generation with a normalized efficiency of 128, 000%/W/cm2 at 1.55 μm pump wavelength, nearly two orders of magnitude higher than the state of the art in the telecommunication C band. Further, we realize an ultra-bright, broadband time-energy entangled photon source with a pair generation rate of 97 GHz/mW and a bandwidth of 115 nm centered at the telecommunication C band. The InGaP entangled photon source shows high coincidence-to-accidental counts ratio CAR > 104 and two-photon interference visibility > 98%. The InGaP second-order nonlinear photonics platform will have wide-ranging implications for non-classical light generation, optical signal processing, and quantum networking.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142431847","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

Highly DUV to NIR-II responsive broadband quantum dots heterojunction photodetectors by integrating quantum cutting luminescent concentrators 通过集成量子切割发光聚光器实现高紫外至近红外-II 波段响应的宽带量子点异质结光电探测器

Light-Science & Applications Pub Date : 2024-10-15 DOI: 10.1038/s41377-024-01604-0

Nan Ding, Wen Xu, Hailong Liu, Yuhan Jing, Zewen Wang, Yanan Ji, Jinlei Wu, Long Shao, Ge Zhu, Bin Dong

{"title":"Highly DUV to NIR-II responsive broadband quantum dots heterojunction photodetectors by integrating quantum cutting luminescent concentrators","authors":"Nan Ding, Wen Xu, Hailong Liu, Yuhan Jing, Zewen Wang, Yanan Ji, Jinlei Wu, Long Shao, Ge Zhu, Bin Dong","doi":"10.1038/s41377-024-01604-0","DOIUrl":"https://doi.org/10.1038/s41377-024-01604-0","url":null,"abstract":"Low-cost, high-performance, and uncooled broadband photodetectors (PDs) have potential applications in optical communication etc., but it still remains a huge challenge to realize deep UV (DUV) to the second near-infrared (NIR-II) detection for a single broadband PD. Herein, a single PD affording broadband spectral response from 200 to 1700 nm is achieved with a vertical configuration based on quantum dots (QDs) heterojunction and quantum cutting luminescent concentrators (QC–LC). A broadband quantum dots heterojunction as absorption layer was designed by integrating CsPbI3:Ho3+ perovskite quantum dots (PQDs) and PbS QDs to realize the spectral response from 400 to 1700 nm. The QC–LC by employing CsPbCl3:Cr3+, Ce3+, Yb3+, Er3+ PQDs as luminescent conversion layer to collect and concentrate photon energy for boosting the DUV–UV (200–400 nm) photons response of PDs by waveguide effect. Such broadband PD displays good stability, and outstanding sensitivity with the detectivity of 3.19 × 1012 Jones at 260 nm, 1.05 × 1013 Jones at 460 nm and 2.23 × 1012 Jones at 1550 nm, respectively. The findings provide a new strategy to construct broadband detector, offering more opportunities in future optoelectronic devices.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142431848","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

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