Experimental Observation of Linear and Rotational Doppler Shifts from Several Designer Surfaces

被引：39

作者：

Liu, Baiyang ^{[1
,2
]}

Chu, Hongchen ^{[1
,3
,4
]}

Giddens, Henry ^{[1
]}

Li, Ronglin ^{[2
]}

Hao, Yang ^{[1
]}

机构：

[1] Queen Mary Univ London, Sch Elect Engn & Comp Sci, London E1 4NS, England

[2] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510640, Guangdong, Peoples R China

[3] Soochow Univ, Coll Phys Optoelect & Energy, Suzhou 215006, Peoples R China

[4] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215006, Peoples R China

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

基金：

英国工程与自然科学研究理事会; 中国国家自然科学基金;

关键词：

ORBITAL ANGULAR-MOMENTUM; SPIRAL PHASE PLATES; EXPERIMENTAL-VERIFICATION; FREQUENCY-SHIFT; LIGHT; POLARIZATION; COMMUNICATION; GENERATION; LINK; BAND;

D O I：

10.1038/s41598-019-45516-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

An orbital angular momentum (OAM) carrying beam has the ability to detect a spinning surface from its rotational Doppler effect. However, a mixture of linear and rotational Doppler effects can occur when an OAM beam is illuminated to a target, with not only spins but also vibrations. In this paper, we experimentally observe using OAM carrying beams, both linear and rotational Doppler effects from several designer surfaces. Specifically, a spinning polarization-independent metasurface, helicoidal reflector and propeller are applied respectively in this study. We demonstrate by the use of two microwave beams with opposite OAM to separate rotational Doppler shift from micro-Doppler shift. The proposed method can also be applied to measure the spinning speed of rotational objects, which have wider applications in intelligent sensing, radar and quantum optics.

引用

页数：9

共 47 条

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