Helicity-delinked manipulations on surface waves and propagating waves by metasurfaces

Nanophotonics

article

Shiqing Li¹  Shulin Sun¹  Zhuo Wang³  Shaohua Dong¹  Sixiong Yi¹  Fuxin Guan³  Yizhen Chen¹  Huijie Guo³  Qiong He³  Lei Zhou³ 

[1] Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Green Photonics and Department of Optical Science and Engineering, Fudan University;Academy for Engineering and Technology, Fudan University;State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University;Collaborative Innovation Center of Advanced Microstructures

关键词: far-field;    helicity;    metasurface;    near-field;    surface wave;   

DOI  :  10.1515/nanoph-2020-0200

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Although many approaches have been proposed to manipulate propagating waves (PWs) and surface waves (SWs), usually each operation needs a separate meta-device, being unfavorable for optical integrations. Here, we propose a scheme to design a single meta-device that can efficiently generate SWs and/or PWs with pre-designed wavefronts, under the excitations of circularly polarized (CP) PWs with different helicity. As a proof of concept, we design and fabricate a microwave meta-device and experimentally demonstrate that it can convert incident CP waves of opposite helicity to SWs possessing different wavefronts and traveling to opposite directions, both exhibiting very high efficiencies. We further generalize our scheme to design a meta-device and numerically demonstrate that it can either excite a SW beam with tailored wavefront or generate a far-field PW with pre-designed wavefront, as shined by CP waves with different helicity. Our work opens the door to achieving simultaneous controls on far- and near-field electromagnetic environments based on a single ultra-compact platform.

【 授权许可】

CC BY