Full-space Cloud of Random Points with a Scrambling Metasurface

Light, Science & Applications
Zile LiCheng-Wei Qiu

Abstract

With the rapid progress in computer science, including artificial intelligence, big data and cloud computing, full-space spot generation can be pivotal to many practical applications, such as facial recognition, motion detection, augmented reality, etc. These opportunities may be achieved by using diffractive optical elements (DOEs) or light detection and ranging (LIDAR). However, DOEs suffer from intrinsic limitations, such as demanding depth-controlled fabrication techniques, large thicknesses (more than the wavelength), Lambertian operation only in half space, etc. LIDAR nevertheless relies on complex and bulky scanning systems, which hinders the miniaturization of the spot generator. Here, inspired by a Lambertian scatterer, we report a Hermitian-conjugate metasurface scrambling the incident light to a cloud of random points in full space with compressed information density, functioning in both transmission and reflection spaces. Over 4044 random spots are experimentally observed in the entire space, covering angles at nearly 90°. Our scrambling metasurface is made of amorphous silicon with a uniform subwavelength height, a nearly continuous phase coverage, a lightweight, flexible design, and low-heat dissipation. Thus, it ...Continue Reading

References

Mar 23, 2012·Sensors·Kourosh Khoshelham, Sander Oude Elberink
Nov 15, 2012·Nature Communications·Xianzhong ChenThomas Zentgraf
Jul 19, 2014·Science·Dianmin LinMark L Brongersma
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Sep 14, 2017·Scientific Reports·Fuyong YueXianzhong Chen

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Citations

Nov 21, 2019·Advanced Materials·Ke ChenCheng-Wei Qiu
Oct 23, 2019·Nature Communications·Lei JinCheng-Wei Qiu
Feb 5, 2019·Micromachines·Sanghun BangJunsuk Rho
Jul 31, 2019·Scientific Reports·Iman SajedianJunsuk Rho
Jun 23, 2020·Light, Science & Applications·Liangui DengShuang Zhang
Oct 23, 2019·Nanoscale·Nasir MahmoodJunsuk Rho
Mar 18, 2021·Optics Express·Guoxing ZhengZile Li
May 8, 2021·Nature Nanotechnology·Inki KimJunsuk Rho
Jun 13, 2021·Light, Science & Applications·Liangui DengShuang Zhang
Jul 17, 2021·Optics Express·Xiao LiangGuoxing Zheng
Aug 28, 2021·Micromachines·Eric K NagamineSamuel D Butler
Oct 2, 2021·Nature Nanotechnology·Jung-Hwan SongMark L Brongersma
Sep 8, 2021·Chemical Reviews·Chunghwan JungJunsuk Rho

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Methods Mentioned

BETA
electron beam lithography

Software Mentioned

Kinect
COMSOL

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