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

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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Snapshot multi-dimensional computational imaging through a liquid crystal diffuser

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Photonics Research 2023年第3期11卷 I0048-I0061页

作者： YUNSONG LEI QI ZHANG YINGHUI GUO MINGBO PU FANG ZOU XIONG LI XIAOLIANG MA 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 tianfu xinglong lake laboratory Chengdu 610299China

Multi-dimensional optical imaging systems that simultaneously gather intensity,depth,polarimetric,and spectral information have numerous applications in medical sciences,robotics,and ***,most current approaches require mechanical moving parts or multiple modulation processes and thus suffer from long acquisition time,high system complexity,or low sampling ***,a methodology to build snapshot multi-dimensional lensless imaging is proposed by combining planar-optics and computational technology,benefiting from sufficient flexibilities in optical engineering and robust information ***,a liquid crystal diffuser based on geometric phase modulation is designed to simultaneously encode the spatial,spectral,and polarization information of an object into a snapshot detected speckle *** the same time,a post-processing algorithm acts as a special decoder to recover the hidden information in the speckle with the independent and unique point spread function related to the position,wavelength,and *** the merits of snapshot acquisition,multi-dimensional perception ability,simple optical configuration,and compact device size,our approach can find broad potential applications in object recognition and classification.

关键词： speckle crystal optics

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High-fidelity mode scaling via topologicaloptimized on-chip metalens for compact photonic interconnection

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Light(Advanced Manufacturing) 2023年第3期4卷 222-232页

作者： Yingli Ha Lijun Wang Yinghui Guo Mingbo Pu Fang Zou Xiong Li Yulong Fan Xiaoliang Ma Xiangang Luo 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

Photonic integrated circuits(PICs)have attracted significant interest in communication,computation,and biomedical ***,most rely on highly integrated PICs devices,which require a low-loss and high-integration guided wave *** to the various dimensions of different integrated photonic devices,their interconnections typically require waveguide *** a waveguide taper can overcome the width mismatch of different devices,its inherent tapering width typically results in a long length,which fundamentally limits the efficient interconnection between devices with a high scaling ratio over a short ***,we proposed a highly integrated on-chip metalens that enables optical interconnections between devices with high width-scaling ratios by embedding a free-form metasurface in a silicon-on-insulator *** special geometric features endow the designed metalens with high coupling efficiency and high *** device has a footprint of only 2.35μm in the longitudinal direction and numerical aperture of 2.03,enabling beam focusing and collimation of less than 10μm between devices with width-scaling ratio of *** the fundamental transverse electric field(TE0)mode,the relative transmittance is as high as 96%for forward incidence(from wide to narrow waveguides),whereas the metalens can realize wavefront shaping for backward incidence,which can be used in optical phase *** study provides new ideas for optical interconnect design and wavefront shaping in high-integration *** design approach has potential applications in directional radiators,LiDAR,on-chip optical information processing,analogue computing,and imaging.

关键词： On-chip metalens Inverse design Phase collimate Photonic integrated circuits

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Fano resonance-enhanced Si/MoS_(2) photodetector

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Photonics Research 2023年第12期11卷 2159-2167页

作者： TIANXUN GONG BOYUAN YAN TAIPING ZHANG WEN HUANG YUHAO HE XIAOYU XU SONG SUN XIAOSHENG ZHANG School of Integrated Circuit Science and Engineering(Exemplary School of Microelectronics) University of Electronic Science and Technology ofChinaChengdu 611731China tianfu xinglong lake laboratory Chengdu 610299China Microsystem and Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621900China

In this work,a Si∕MoS_(2) heterojunction photodetector enhanced by hot electron injection through Fano resonance is *** preparing Au oligomers using capillary-assisted particle assembly(CAPA)on the silicon substrate with a nanohole array and covering few-layer MoS_(2) with Au electrodes on top of the oligomer structures,the Fano resonance couples with a Si∕MoS_(2) *** on-resonance excitation,Fano resonance generated many hot electrons on the surface of oligomers,and the hot electrons were injected into MoS_(2),providing an increased current in the photodetector under a bias *** photodetectors exhibited a broadband photoresponse ranging from 450 to 1064 nm,and a large responsivity up to 52 A/W at a wavelength of 785 nm under a bias voltage of 3 *** demonstrated Fano resonance-enhanced Si∕MoS_(2) heterojunction photodetector provides a strategy to improve the photoresponsivity of two-dimensional materials-based photodetectors for optoelectronic applications in the field of visible and near-infrared detection.

关键词： resonance MoS preparing

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一种用于大视场成像和偏振光谱探测的微型可重构超构光学系统

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Engineering 2024年第4期35卷 67-73页

作者： Fei Zhang Minghao Liao Mingbo Pu Yinghui Guo Lianwei Chen Xiong Li Qiong He Tongtong Kang Xiaoliang Ma Yuan Ke Xiangang Luo State Key laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China National Key laboratory of Optical Field Manipulation Science and Technology Chinese Academy of SciencesChengdu 610209China School of Optoelectronics 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

Wide-angle imaging and spectral detection play vital roles in tasks such as target tracking,object classification,and ***,limited by their intrinsically different architectures,as determined by frequency dispersion requirements,their simultaneous implementation in a shared-aperture system is ***,we propose a novel concept to realize reconfigurable dual-mode detection based on electrical-control tunable *** a proof-of-concept demonstration,the simultaneous implementation of wide-angle imaging and polarization-spectral detection in a miniature sharedaperture meta-optical system is realized for the first time via the electrical control of cascaded catenary-like *** proposed system supports the imaging(spectral)resolution of approximately 27.8 line-pairs per millimeter(lp·mm^(-1);~80 nm)for an imaging(spectral)mode from 8 to 14 μ*** system also bears a large field of view of about 70°,enabling multi-target recognition in both *** work may promote the miniaturization of multifunctional optical systems,including spectrometers and polarization imagers,and illustrates the potential industrial applications of meta-optics in biomedicine,security,space exploration,and more.

关键词： Metasurfaces Reconfigurable Imaging Spectral

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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

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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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Rationalizing the isolation distance needed for field trials involving genetically modified rapeseed (Brassica napus L.) in China

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Chinese Science Bulletin 2013年第13期58卷 1558-1567页

作者： ZHAO XiangXiang TANG Tang CHEN GuiMin LIU FuXia WANG xinglong BU CuiPing LU ChangMing Key laboratory of Oil Crop Biology of Ministry of Agriculture Oilcrops Research InstituteChinese Academy of Agricultural Sciences Jiangsu Key laboratory for Eco-Agricultural Biotechnology around Hongze lake Huaiyin Normal University

The isolation distance required for field trials of genetically modified (GM) rapeseed varies widely worldwide, with a 50-400 m distance in most nations contrasting with a minimum 1000-m isolation distance in China. The goal of this study was to evaluate the relevance of current regulations in China regarding the isolation distance needed for GM rapeseed trials. A pollen flow experiment was conducted based on the design of concentric circles, with the GM plants in a 20-m diameter circle at the centre, surrounded by non-GM plants to a distance 60 m from the perimeter of the circle containing GM plants. The rate of pollen flow was the highest at the isolation distance of 0.5 m, where it ranged from 2.3091% to 2.6711%. The general pattern of the pollen flow rate (y) with distance (x) was well described by the equation y = 1.3936x-0.9136 (R 2 = 0.9950). The long-distance pollen flow tested at the isolation distance of 800 m was 0.0018%, which agrees with the theoretical prediction. The results suggested that 300 m, rather than 1000 m, is a reasonable distance to ensure a tolerable threshold of pollen flow (less than 0.01%) under conditions of winter rapeseed production in China.

关键词：转基因油菜籽隔离距离现场试验中国转基因植物花粉流世界范围田间试验

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Deciphering the Role of Fluoroethylene Carbonate towards Highly Reversible Sodium Metal Anodes

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Research 2022年第2期2022卷 259-269页

作者： Xueying Zheng Suting Weng Wei Luo Bo Chen Xiao Zhang Zhenyi Gu Haotian Wang Xiaolu Ye Xuyang Liu Liqiang Huang xinglong Wu Xuefeng Wang Yunhui Huang Institute of New Energy for Vehicdes Shanghai Key Laboratory of Developmrent&Apication for Metali Functional MaterialsSchool of Materials Science and EngineringTongji UniversitShanghai 201804China Instiute of Physics Chinese Academy of SciencesSchoo of Plhysical SciencesUniversity of Chinese Academy of SciencesBeiing 100190China Key laboratory of Advanced Civil Engineering Materials(Tongji University) Ministry of EducationShanghai 201804China Key laboratory for UV Light Emiting Materials and TechnologyNortheast Normal UniversilyMinistry of EducationChangchumJilin 130024China Tianmu lake Institute of Advanced Energy Storage Technologies Co. LtdLiyangJiangsu 213300China State Key laboratory of Materials Procssing and Die&Mould Technology Schoo of Materials Science and Engineering Huazhong University of Science and TechnologyWuhanHubei 430074China

Sodium metal anodes(SMAs)sufer from extremely low reversibility(95%with conventional NaPF。salt at a regular concentration(1.0M).The peculiar role of FEC is *** via its involvement into the solvation structure,where a threshold FEC concentration with a coordination number>1.2 is needed in guaranteeing high Na reversibility over the ***,by incorporating an average number of 1.2 FEC molecules into the primary Na*solvation sheath,lowest unoccupied molecular orbital(LUMO)levels of such Nat-FEC solvates undergo further decrease,with spin electrons residing either on the O=C 0(O)moiety of FEC or sharing between Na*and its C=:O bond,which ensures a prior FEC decomposition in passivating the Na surface against other carbonate ***,by adopting cryogenic tranmission electron microscopy(cryo-TEM),we found that the Na filaments grow into substantially larger diameter from-400nm to>1 pum with addition of FEC upon the threshold *** crstalline and much thiner(-40 nm)slid-electrolyte interphase(SED)is consequently observed to uniformly wrap the Na surface,in contrast to the severely corroded Na as retrieved from the blank *** potence of FEC is further demonstrated in a series of"corrosive solvents"such as ethy!l acetate(EA)。trimethyl phosphate(TMP),and actonitrile(AN)enabling highly reversible SMAs in the otherwise unusable solvent systems.

关键词： electrolyte otherwise Highly

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