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Spin-decoupled metasurface for simultaneous detection of spin and orbital angular momenta via momentum transformation

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Light(Science & Applications) 2021年第4期10卷 636-647页

作者： Yinghui Guo Shicong Zhang Mingbo Pu Qiong He Jinjin Jin mingfeng xu Yaxin Zhang Ping Gao Xiangang Luo State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China School of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China

With inherent orthogonality,both the spin angular momentum(SAM)and orbital angular momentum(OAM)of photons have been utilized to expand the dimensions of quantum information,optical communications,and information processing,wherein simultaneous detection of SAMs and OAMs with a single element and a single-shot measurement is highly ***,a single azimuthal-quadratic phase metasurface-based photonic momentum transformation(PMT)is illustrated and utilized for vortex *** different vortices are converted into focusing patterns with distinct azimuthal coordinates on a transverse plane through PMT,OAMs within a large mode space can be determined through a single-shot ***,spin-controlled dual-functional PMTs are proposed for simultaneous SAM and OAM sorting,which is implemented by a single spin-decoupled metasurface that merges both the geometric phase and dynamic ***,our proposed method can detect vectorial vortices with both phase and polarization singularities,as well as superimposed vortices with a certain interval *** results obtained at several wavelengths in the visible band exhibit good agreement with the numerical *** the merits of ultracompact device size,simple optical configuration,and prominent vortex recognition ability,our approach may underpin the development of integrated and high-dimensional optical and quantum systems.

关键词： momentum angular simultaneous

Genome-wide identification, expression analysis of auxin-responsive GH_3 family genes in maize(Zea mays L.) under abiotic stresses

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Journal of Integrative Plant Biology 2015年第9期57卷 783-795页

作者： Shangguo Feng Runqing Yue Sun Tao Yanjun Yang Lei Zhang mingfeng xu Huizhong Wang Chenjia Shen College of Life and Environmental Sciences Hangzhou Normal University Henan Academy of Agricultural Sciences Department of Plant Pathology Washington State University

Auxin is involved in different aspects of plant growth and development by regulating the expression of auxin-responsive family genes. As one of the three major auxin-responsive families, GH3 (Gretchen Hagen3) genes participate in auxin homeostasis by catalyzing auxin conjugation and bounding free indole-3-acetic acid (IAA) to amino acids. However, how GH3 genes function in responses to abiotic stresses and various hormones in maize is largely unknown. Here, the latest updated maize (Zea mays L.) reference genome sequence was used to characterize and analyze the ZmGH3 family genes from maize. The results showed that 13 ZmGH3 genes were mapped on five maize chromosomes (total 10 chromosomes). Highly diversified gene structures and tissue-specific expression patterns suggested the possibility of function diversification for these genes in response to environmental stresses and hormone stimuli. The expression patterns of ZmGH3 genes are responsive to several abiotic stresses (salt, drought and cadmium) and major stress-related hormones (abscisic acid, salicylic acid and jasmonic acid). Various environmental factors suppress auxin free IAA contents in maize roots suggesting that these abiotic stresses and hormones might alter GH3-mediated auxin levels. The respon-siveness of ZmGH3 genes to a wide range of abiotic stresses and stress-related hormones suggested that ZmGH3s are involved in maize tolerance to environmental stresses.

关键词： Abiotic stress auxin auxin responsive gene GH3 gene family maize

Inversely engineered metasurfaces for independent manipulation of transmitted and reflected light fields

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 97-106页

作者： Yongjian Liu Yu Luo Fei Zhang Mingbo Pu Hanlin Bao mingfeng xu Yinghui Guo Lanting Li Xiong Li Xiaoliang Ma Xiangang Luo National Key Laboratory of Optical Field Manipulation Science and Technology Chinese Academy of SciencesChengdu 610209China State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Tianfu Xinglong Lake Laboratory Chengdu 610299China

Independent manipulation of transmitted and reflected light fields is a key technology for the realization of multifunctional optical applications,which can be implemented based on multilayered plasmonic or supercell subwavelength ***,the former is not suitable for the optical bands,while the latter is insufficient in generating large phase ***,an adjoint-optimization-based inverse design methodology is proposed,which utilizes the polarization-selective local interference between individual meta-atoms and enables monolayer dielectric metasurfaces to decouple the wavefront of transmitted and reflected optical ***,this methodology serves to mitigate the aperiodic electromagnetic crosstalk inherent between adjacent meta-atoms,consequently leading to a significant enhancement in the performance of *** analyzed the physical mechanism of adjoint optimization and proposed the concept of phase factors,highlighting their importance in the rapid inverse design of meta-devices—an aspect often overlooked in previous *** demonstrate the feasibility and robustness of our method,we optimize monolayer metasurfaces with different initial *** devices efficiently focus and deflect x-linearly and y-linearly polarized incident light in transmission and reflection spaces,***,this methodology holds immense potential for designing multifunctional,high-performing metasurfaces that meet multiple constraints,opening up broad prospects for applications.

关键词： full-space metasurfaces adjoint optimization inverse design

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Simultaneously enhancing capacity and security in free-space optical chaotic communication utilizing orbital angular momentum

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Photonics Research 2023年第12期11卷 2185-2193页

作者： YIQUN ZHANG mingfeng xu MINGBO PU MENGJIE ZHOU JIAZHENG DING SHUANGCHENG CHEN KUN QIU NING JIANG XIANGANG LUO School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China School of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China Tianfu Xinglong Lake Laboratory Chengdu 610299China

Optical chaotic signals emitted from an external-cavity feedback or injected laser diode enable small-signal information concealment in a noise-like carrier for secure optical *** to the chaotic bandwidth limitation resulting from intrinsic relaxation oscillation frequency of lasers,multiplexing of optical chaotic signal,such as wavelength division multiplexing in fiber,is a typical candidate for high-capacity secure ***,to our best knowledge,the utilization of the spatial dimension of optical chaos for free-space secure communication has not yet been ***,we experimentally demonstrate a free-space all-optical chaotic communication system that simultaneously enhances transmission capacity and security by orbital angular momentum(OAM)*** chaotic signals with two different OAM modes totally carrying 20 Gbps on-off keying signals are secretly transmitted over a 2 m free-space link,where the channel crosstalk of OAM modes is less than-20 d B,with the mode spacing no less than *** receiver can extract valid information only when capturing approximately 92.5% of the OAM beam and correctly demodulating the corresponding *** error rate below the 7%hard-decision forward error correction threshold of 3.8×10^(-3)can be achieved for the intended ***,a simulated weak turbulence is introduced to comprehensively analyze the influence on the system performance,including channel crosstalk,chaotic synchronization,and transmission *** work may inspire structured light application in optical chaos and pave a new way for developing future high-capacity free-space chaotic secure communication systems.

关键词： communication chaotic momentum

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低碳胶凝材料的研究进展

材料导报 2024年第2期38卷 56-64页

作者：聂松周健徐名凤李辉河北工业大学土木与交通学院天津300401

水泥作为构筑现代社会不可或缺的原材料,在满足基础设施建设巨大需求的同时,自身生产伴随着CO_(2)排放高的问题。近年来,为减少水泥生产过程中的CO_(2)排放,实现水泥行业可持续发展,人们提出了一系列CO_(2)减排措施,包括提高能源效率、... 详细信息

水泥作为构筑现代社会不可或缺的原材料,在满足基础设施建设巨大需求的同时,自身生产伴随着CO_(2)排放高的问题。近年来,为减少水泥生产过程中的CO_(2)排放,实现水泥行业可持续发展,人们提出了一系列CO_(2)减排措施,包括提高能源效率、使用替代原燃料、使用辅助胶凝材料、采用CCUS技术以及开发新型低碳胶凝材料等。从长远来看,低碳胶凝材料将在水泥行业CO_(2)减排中起重要作用。本文总结了低熟料水泥、低钙水泥、固碳水泥和碱激发胶凝材料四类低碳胶凝材料的研究进展,介绍了各类低碳胶凝材料的制备方法与基本性能,对比分析了传统硅酸盐水泥与低碳胶凝材料的CO_(2)排放,最后指出了低碳胶凝材料发展过程中存在的问题,并为其进一步研究工作提出了建议。

关键词：水泥 CO_(2)排放低碳胶凝材料 CO_(2)减排技术

Towards the performance limit of catenary meta-optics via field-driven optimization

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Opto-Electronic Advances 2024年第5期7卷 33-42页

作者： Siran Chen Yingli Ha Fei Zhang Mingbo Pu Hanlin Bao mingfeng xu Yinghui Guo Yue Shen Xiaoliang Ma Xiong Li Xiangang Luo National Key Laboratory of Optical Field Manipulation Science and Technology Chinese Academy of SciencesChengdu 610209China State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Department of Electrical and Computer Engineering University of California Los Angeles(UCLA)Los AngelesCalifornia 90095USA

Catenary optics enables metasurfaces with higher efficiency and wider bandwidth,and is highly anticipated in the imaging system,super-resolution lithography,and broadband ***,the periodic boundary approximation without considering aperiodic electromagnetic crosstalk poses challenges for catenary optical devices to reach their performance ***,perfect control of both local geometric and propagation phases is realized through field-driven optimization,in which the field distribution is calculated under real boundary *** from other optimization methods requiring a mass of iterations,the proposed design method requires less than ten iterations to get the efficiency close to the optimal *** on the library of shape-optimized catenary structures,centimeter-scale devices can be designed in ten seconds,with the performance improved by ~15%.Furthermore,this method has the ability to extend catenary-like continuous structures to arbitrary polarization,including both linear and elliptical polarizations,which is difficult to achieve with traditional design *** provides a way for the development of catenary optics and serves as a potent tool for constructing high-performance optical devices.

关键词： catenary optics catenary structures field-driven optimization

轻质玄武岩纤维高延性水泥基复合材料研制及导热性能研究

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材料导报 2023年第20期37卷 273-278页

作者：张文雅周健李辉徐名凤河北工业大学土木与交通学院天津300401

高延性纤维增强水泥基防火材料(FR-ECC)具有遇火不燃性、高温不分解有毒气体、耐久性良好、延性高、抗裂性能好等优点,近年来得到了广泛关注和研究。常规FR-ECC的制备采用有机纤维为增韧组分,而有机纤维在高温条件下纤维分解气化易导致... 详细信息

高延性纤维增强水泥基防火材料(FR-ECC)具有遇火不燃性、高温不分解有毒气体、耐久性良好、延性高、抗裂性能好等优点,近年来得到了广泛关注和研究。常规FR-ECC的制备采用有机纤维为增韧组分,而有机纤维在高温条件下纤维分解气化易导致防火材料延性下降,造成开裂失效,制约了FR-ECC的应用。本工作以耐高温性能优异的铝酸盐水泥和玄武岩纤维(BF)作为原材料,设计研发轻质玄武岩纤维水泥基复合材料(LWBF-ECC),并研究该材料高温后力学性能及热学性能的演化规律。试验分析了LWBF-ECC在常温和高温后的干密度变化、物相变化、单轴抗拉强度和抗压强度变化规律,并研究了其在不同过火温度下延性及导热系数的变化规律。研究表明:在常温环境下,LWBF-ECC延性可达0.82%,是常规钢结构表面喷射防火材料的80倍;由于BF耐高温性能优异,高温下仍能充分发挥桥接作用,在过火温度低于400℃时,LWBF-ECC材料拉伸均表现为应变硬化,高温下仍保持一定延性,100、200和400℃时极限应变分别为0.78%、0.32%和0.18%;随着温度升高,LWBF-ECC干密度降低,孔隙率升高,同时导热系数下降,高温下胶凝材料水化物转变和结晶水损失导致水泥含量越多,质量损失越大,干密度降低越明显。

关键词：高延性水泥基复合材料玄武岩纤维防火轻质导热性能

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转轨国家经济自由度与经济发展的相关性研究

世界经济研究 2006年第7期 84-88,F0003页

作者：李丽徐明峰东北财经大学

世界银行发布的《2004年世界发展指标》、美国传统基金会等机构发布的《2005年世界经济自由度报告》表明,经济自由度与经济发展水平在总体上呈正相关关系,但转轨国家是这种一般性关系的例外。相关性检验和显著性检验的结果表明,经济自... 详细信息

世界银行发布的《2004年世界发展指标》、美国传统基金会等机构发布的《2005年世界经济自由度报告》表明,经济自由度与经济发展水平在总体上呈正相关关系,但转轨国家是这种一般性关系的例外。相关性检验和显著性检验的结果表明,经济自由对市场经济发展和转轨经济发展具有明显不同的影响。市场经济国家的经济自由度与经济发展水平的相关性显著高于转轨国家。转轨国家既要强调经济自由,也要重视影响经济发展的多种因素,特别要重视制度建设的长期性、复杂性,在强调企业竞争力的同时更要强调企业自生能力建设。

关键词：经济自由度经济发展相关性转轨国家

Physics-data-driven intelligent optimization for large-aperture metalenses

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Opto-Electronic Advances 2023年第11期6卷 5-15页

作者： Yingli Ha Yu Luo Mingbo Pu Fei Zhang Qiong He Jinjin Jin mingfeng xu Yinghui Guo Xiaogang Li Xiong Li Xiaoliang Ma Xiangang Luo National Key Laboratory of Optical Field Manipulation Science and Technology Chinese Academy of SciencesChengdu 610209China State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China School of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China Tianfu Xinglong Lake Laboratory Chengdu 610299China

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 *** design methods neglect the coupling effect between adjacent meta-atoms,thus harming the practical performance of *** existing physical/data-driven optimization algorithms can solve the above problems,but bring significant time costs or require a large number of ***,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 *** 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 *** to previous inverse design method,our method significantly boosts designing efficiency with five orders of magnitude reduction in *** generally,it may set a new paradigm for devising large-aperture meta-devices.

关键词： intelligence method physics-data-driven method inverse design large-aperture metalenses