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High efficiency all-dielectric pixelated metasurface for near-infrared full-Stokes polarization detection

Photonics Research 2021年第4期9卷 583-589页

作者： Chong Zhang Jingpei Hu Yangeng Dong Aijun Zeng Huijie Huang chinhua wang Laboratory of Information Optics and Optoelectronic Technology Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Laboratory of Modern Optical Technologies of Ministry of Education Soochow UniversitySuzhou 215006China

Pixelated metasurfaces integrating both the functions of linear polarization and circular polarization filters on a single platform can achieve full-Stokes polarization *** present,the pixelated full-Stokes metasurfaces mainly face the following problems:low transmission,low circular dichroism(CD)of circular polarization filters,and high requirements in fabrication and ***,we propose high performance ultracompact all-dielectric pixelated full-Stokes metasurfaces in the near-infrared band based on silicon-on-insulator,which is compatible with the available semiconductor industry *** polarization filters with high CD are achieved by using simple two-dimensional chiral structures,which can be easily integrated with the linear polarization filters on a single *** addition,the dielectric materials have higher transmission than metal materials with intrinsic *** experimentally demonstrated the circular polarization filter with maximum CD up to 70%at a wavelength of 1.6μm and average transmission efficiency above 80%from 1.48μm to 1.6μ***,our design is highly desirable for many applications,such as target detection,clinical diagnosis,and polarimetric imaging and sensing.

关键词： polarization Stokes dielectric

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Double-triangular whispering-gallery mode lasing from a hexagonal GaN microdisk grown on graphene

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Journal of Materials Science & Technology 2020年第18期52卷 140-145页

作者： Geng He Feifei Qin Chunxiang Xu chinhua wang Yu Xu Bing Cao Ke Xu School of Optoelectronic Science and Engineering Soochow UniversitySuzhou 215006China Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China Soochow UniversitySuzhou 215006China State Key Laboratory of Bioelectronics Department of PhysicsSoutheast UniversityNanjing 210096China Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO) Chinese Academy of Sciences(CAS)Suzhou 215123China Suzhou Nanowin Science and Technology Co Ltd Suzhou 215123China

The III-nitride semiconductor microdisk laser exhibits high quality factor and low excitation threshold with broad development potential in the field of nanophotonics such as nanoscale light-emitting devices and on-chip optical *** far,many works have been focused on process synthesis and nanostructural design of microdisk ***,there are still some limitations in the existing optical resonance mode which is an important internal influence factor for lasing *** this work,a new double-triangular whispering-gallery mode(D3-WGM)lasing from a hexagonal GaN microdisk with a high quality(Q)factor of 3049 and an excitation threshold of around 11.5μW has been experimentally *** addition,the optical properties of hexagonal-WGM(6-WGM),triangular-WGM(3-WGM)and D3-WGM lasing from microdisk are explored by numerical calculation and Comsol *** results confirm that the D3-WGM lasing has its own significant performance advantages,namely high Q factor and easy light *** on this novel laser mode characteristic,microcavity lasers are expected to be further developed and applied in the field of nanophotonics.

关键词： GaN microdisks Graphene Whispering gallery mode Quality factor

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Foveated glasses-free 3D display with ultrawide field of view via a large-scale 2D-metagrating complex

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Light(Science & Applications) 2021年第11期10卷 2217-2225页

作者： Jianyu Hua Erkai Hua Fengbin Zhou Jiacheng Shi chinhua wang Huigao Duan Yueqiang Hu Wen Qiao Linsen Chen School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University215006SuzhouChina Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University215006SuzhouChina State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan University410082ChangshaChina SVG Optronics Co.Ltd215026SuzhouChina

Glasses-free three-dimensional(3D)displays are one of the game-changing technologies that will redefine the display industry in portable electronic ***,because of the limited resolution in state-of-the-art display panels,current 3D displays suffer from a critical trade-off among the spatial resolution,angular resolution,and viewing *** by the so-called spatially variant resolution imaging found in vertebrate eyes,we propose 3D display with spatially variant information *** experiences with smooth motion parallax are maintained at the central view,while the viewing angle is enlarged at the periphery *** is enabled by a large-scale 2D-metagrating complex to manipulate dot/linear/rectangular hybrid shaped ***,a video rate full-color 3D display with an unprecedented 160°horizontal viewing angle is *** thin and light form factors,the proposed 3D system can be integrated with off-the-shelf purchased flat panels,making it promising for applications in portable electronics.

关键词： portable spatially glasses

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Large effective aperture metalens based on optical sparse aperture system

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Chinese Optics Letters 2020年第10期18卷 1-4页

作者： Tiecheng Liu Jingpei Hu Linglin Zhu Ruyi Zhou Chong Zhang chinhua wang Aijun Zeng Huijie Huang Laboratory of Information Optics and Optoelectronic Technology Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Laboratory of Modern Optical Technologies of the Ministry of Education Soochow UniversitySuzhou 215006China

We present a kind of large effective aperture metalens based on an optical sparse aperture(OSA) system. Each subaperture of the system is a metalens, which is comprised of just a thin Au film with patterned subwavelength rectangular annular arrays on a Si O2 substrate and has a numerical aperture of 0.46 with a diameter of 21.6 μ***6 design was selected to enlarge the effective aperture and enhance the spatial resolution. Compared with the absent mid-frequency and high-frequency modulation transfer function of individual metalens, Ring6 can offer a full-frequency band and show a better restored image quality by using Tikhonov regularization.

关键词： optical sparse aperture metalens rectangular annular arrays

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Narrowband Notch Filters with Composite Nanostructure Layers on a GaN-based Light Emitting Diode

Narrowband Notch Filters with Composite Nanostructure Layers...

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2012 International Conference on Nanotechnology Technology and Advanced Materials(ICNTAM 2012)

作者： Bing Cao Guiju Zhang chinhua wang Jianfeng wang Ke Xu Institute of Modern Optical Technologies and Key Lab of Modern Optical Technologies of Jiangsu Province Soochow University Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of Sciences

In this paper, novel active narrowband notch filters with triple-layer composite nanostructures on a Ga N-based LED are obtained by mainly adjusting the grating period and duty cycle. The three layers consist of two dielectric thin layers and one metallic / dielectric grating layer. The grating layer composes of subwavelength period and thickness rectangular stripes, which lies between a transition layer and a protecting layer. Line-width and attenuation peak properties of the resonance filters are calculated and investigated by using a full vector implementation of Rigorous Coupled Wave Analysis(RCWA) algorithm. It is shown that the grating period can significantly change the filter peak wavelength, and the grating duty cycle heavily changes the filter line-width. The filter attenuation peak has a red shift with 23.3nm as the grating period increases 18 nm. The FWHM(Full Width at Half Maximum) of the filter reduces from 1.9nm to 0.28 nm as the duty cycle changes from 0.55 to 0.3, which compressed more than six times. Moreover, thickness of each composite nanostructure layer can also affect the narrowband width and peak wavelength of the filter. The results provide guidance in designing, optimizing and fabricating such an active narrowband filter with highly integrated photonic devices.

关键词： notch filters narrowband Gallium nitride nanostructure

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