中国科学院重庆绿色智能技术研究院机构知识库

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	High efficiency active wavefront manipulation of spin photonics based on a graphene metasurface
	Bai, Xiangxing1,2,3,4; Tang, Linlong2; Yao, Wei2; Zang, Qing1,3,4; Lu, Jialu1,3,4; Liu, Shuang2; Lu, Wenqiang2; Liu, Yang1,3,4; Sun, Xiudong1,3,4,5; Lu, Yueguang1,3,4
	2019-08-05
摘要	Metasurfaces have been widely studied for manipulating light fields. In this work, a novel metasurface element is achieved with a high circular polarization amplitude conversion efficiency of 88.5% that creates an opposite phase shift ranging from -180 degrees to 180 degrees between incidence and reflection for different spin components. By arranging the elements according to different requirements, spin-dependent reflection, focusing and scattering are demonstrated. It is also demonstrated that tuning of the Fermi energy is an viable way to active control the circular polarization conversion efficiency and expand the applicable bandwidth. The results open a new route for modifying and designing the wavefront of circular polarized light. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI	10.1364/OE.27.022475
发表期刊	OPTICS EXPRESS
ISSN	1094-4087
卷号	27期号:16页码:22475-22484
收录类别	SCI
WOS记录号	WOS:000478790400062
语种	英语