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Intelligent metasurface realizes human robots with ‘brain’ and ‘limbs’

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National Science Review 2023年第8期10卷 68-69页

作者： xiangang luo School of Optoelectronics University of Chinese Academy of Sciences State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and Electronics Chinese Academy of Sciences

One of the ultimate goals of robots is the realization of AI human-behaved assistants. The emergence of intelligent indoor robotics is positioned to revolutionize the human experience. In recent times, such robots have demonstrated their utility in various sectors such as manufacturing, medical care, home healthcare, and others [1,2].

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High-precision fabrication of 4m SiC aspheric mirror

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Light(Science & Applications) 2023年第1期12卷 3-4页

作者： xiangang luo State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of Sciences610209 ChengduChina School of Optoelectronics University of Chinese Academy of Sciences100049 BeijingChina

The 4 m diameter SiC aspheric mirror emerges due to a series of technological breakthroughs in blank mirror preparation,asphere fabrication,and testing,as well as cladding and coating,laying the groundwork for future ... 详细信息

关键词： mirror breakthrough coating

Principles of electromagnetic waves in metasurfaces

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Science China(Physics,Mechanics & Astronomy) 2015年第9期58卷 11-28页

作者： luo xiangang State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and Electronics Chinese Academy of Science

Metasurfaces are artificially structured thin films with unusual properties on demand. Different from metamaterials, the metasurfaces change the electromagnetic waves mainly by exploiting the boundary conditions, rather than the constitutive parameters in three dimensional(3D) spaces. Despite the intrinsic similarities in the operational principles, there is not a universal theory available for the understanding and design of metasurface-based devices. In this article, we propose the concept of metasurface waves(M-waves) and provide a general theory to describe the principles of them. Most importantly, it is shown that the M-waves share some fundamental properties such as extremely short wavelength, abrupt phase change and strong chromatic dispersion, which make them different from traditional bulk waves. It is shown that these properties can enable many important applications such as subwavelength imaging and lithography, planar optical devices, broadband anti-reflection, absorption and polarization conversion. Our results demonstrated unambiguously that traditional laws of diffraction, refraction, reflection and absorption should be revised by using the novel properties of M-waves. The theory provided here may pave the way for the design of new electromagnetic devices and further improvement of metasurfaces. The exotic properties of metasurfaces may also form the foundations for two new sub-disciplines called "subwavelength surface electromagnetics" and "subwavelength electromagnetics".

关键词： metasurface subwavelength structure diffraction limit flat lens perfect absorption

Plasmonic metalens for nanofabrication

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National Science Review 2018年第2期5卷 137-138页

作者： xiangang luo State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and Electronics Chinese Academy of Sciences

INTRODUCTION Optical lithography is the primary tool for the fabrication of micro/nanostructures in micro-electronic and opto-electronic applications,which has fueled the explosive growth of the semiconductor *** the ...

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Subwavelength electromagnetics

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Frontiers of Optoelectronics 2016年第2期9卷 138-150页

作者： xiangang luo State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and Electronics Chinese Academy of Sciences Chengdu 610209 China

Subwavelength electromagnetics is a disci- pline that deals with light-matter interaction at subwave- length scale and innovative technologies that control electromagnetic waves with subwavelength structures. Although the history can be dated back to almost one hundred years ago, the flourish of these researching areas have been no more than 30 years. In this paper, we gave a brief review of the history, current status and future trends of subwavelength electromagnetics. In particular, the milestones related with metamaterials, plasmonics, meta- surfaces and photonic crystals are highlighted.

关键词： electromagnetics subwavelength scale meta-materials plasmonics photonic crystals

Synthetic vector optical fields with spatial and temporal tunability

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Science China(Physics,Mechanics & Astronomy) 2022年第5期65卷 43-50页

作者： Fei Zhang MingBo Pu YingHui Guo XiaoLiang Ma Xiong Li 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

As an intrinsic nature of light,polarization plays a critical role in the vectorial characteristic of optical *** optical fields with an inhomogeneous polarization distribution show many exotic phenomena and applications not existing in scalar optical *** polarization optics,however,mainly focuses on the manipulation of polarization distribution on a single transverse ***,we propose a synthetic approach to realize polarization manipulation with spatial and temporal *** underlying mechanism relies on decoupling two orthogonal polarization states through asymmetric photonic spin-orbit interactions to obtain customer-tailored phase and amplitude difference in both transverse and longitudinal space,thereby changing the resulting polarization distribution at will in three-dimensional(3 D)***,a longitudinally varied cylindrical vector field is experimentally demonstrated by a monolayer metasurface,in which the polarization distribution switches continuously and periodically between radial and azimuthal ***,the vector field can be dynamically tuned by rotating the incident polarization *** work extends polarization optics from two-dimensional space to 3 D space,allowing the arbitrary generation and manipulation of 3D vector optical fields with temporal tunability.

关键词： metasurfaces vector optical fields spin-orbit interactions polarization optics

The Next Breakthroughs of Artificial Intelligence:The Interdisciplinary Nature of AI

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Engineering 2020年第3期6卷 245-247页

作者： Yueting Zhuang Ming Cai Xuelong Li xiangang luo Qiang Yang Fei Wu College of Computer Science and Technology Zhejiang UniversityHangzhou 310027China School of Computer Science Northwestern Polytechnical UniversityXi’an 710129China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China Department of Computer Science and Engineering Hong Kong University of Science and TechnologyHong Kong 999077China

*** Artificial intelligence(AI)is committed to the realization of machine-borne *** technologies underpinning AI have made huge leaps in the past decade,bringing exciting applications such as language understanding,vision recognition,and intelligent digital ***,contemporary AI systems are good at specific predefined tasks and are unable to learn by themselves from data or from experience,intuitive reasoning,and adaptation.

关键词： reasoning bringing realization

Design and fabrication of broadband ultralow reflectivity black Si surfaces by laser micro/nanoprocessing

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Light(Science & Applications) 2014年第1期3卷 147-154页

作者： Jing Yang Fangfang luo Tsung Sheng Kao Xiong Li Ghim Wei Ho Jinghua Teng xiangang luo Minghui Hong Department of Electrical and Computer Engineering National University of SingaporeSingapore 117576Singapore Institute of Materials Research and Engineering Agency for ScienceTechnology and ResearchSingapore 117602Singapore NUS Environmental Research Institute National University of SingaporeSingapore 117411Singapore State Key Laboratory of Optical Technologies for Microfabrication Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China

Light collection efficiency is an important factor that affects the performance of many optical and optoelectronic *** these devices,the high reflectivity of interfaces can hinder efficient light *** minimize unwanted reflection,anti-reflection surfaces can be fabricated by micro/*** this paper,we investigate the fabrication of broadband anti-reflection Si surfaces by laser micro/*** direct writing is applied to create microstructures on Si surfaces that reduce light reflection by light *** addition,laser interference lithography and metal assisted chemical etching are adopted to fabricate the Si nanowire *** anti-reflection performance is greatly improved by the high aspect ratio subwavelength structures,which create gradients of refractive index from the ambient air to the ***,by decoration of the Si nanowires with metallic nanoparticles,surface plasmon resonance can be used to further control the broadband reflections,reducing the reflection to below 1.0%across from 300 to 1200 *** average reflection of 0.8%is achieved.

关键词： anti-reflection broadband laser micro/nanoprocessing surface plasmons

Advancing nonlinear nanophotonics:harnessing membrane metasurfaces for third-harmonic generation and imaging

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Opto-Electronic Advances 2023年第8期6卷 4-6页

作者： Mingbo Pu xiangang luo State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Key Laboratory of Optical Field Manipulation Science and Technology Chinese 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

Dielectric metasurfaces are crucial for enhancing optical nonlinear generation,particularly membrane metasurfaces with multipolar resonances and compact *** silicon dimer-hole membrane metasurfaces,Rahmani,and Xu show how bound states in the continuum(BICs)can be formed and transformed into quasi-BICs by adjusting hole *** innovation enables efficient conversion of infrared images to visible range,promising applications in nonlinear photonics and near-infrared imaging technologies.

关键词： nonlinear surfaces harmonic