期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep41893
关键词
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资金
- National Natural Science Foundation of China [61378057]
- National High Technology Research and Development Program of China [2013AA031901]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- graduate research and innovation plans of colleges and universities in Jiangsu [KYZZ15_0329]
- Natural Science Foundation of Jiangsu Province of China [BK20130392]
- Open Project of Key Laboratory of Universities and Colleges in Jiangsu Province [KJS1204]
We propose and experimentally demonstrate a high efficient circularly polarizing dichroism waveplate (CPDW) using a Si-based all-dielectric 2Dchiral metasurface. We demonstrate that the CPDW exhibits a unique dichroism in that it functions as a transmissive quarter waveplate for one of either left-or-right-handed circularly polarized incident lightand a reflective mirror for the opposite polarization. The circular polarization dichroism (CPD = I-RCP-I-LCP) in transmission at wavelength similar to 1.5 mu m reaches 97% and the extinction ratio (ER = I-RCP/I-LCP) is as high as 345:1. Experimental fabrications and measurements of the proposed all-dielectric metasurface are implemented and found to be in excellent agreement with the simulations. The proposed all-dielectric chiral metasurface is of advantages of high-dichroism, easy-fabrication and standard semiconductor fabrication techniques compatible, which could lead to enhanced security in fiber and free-space communications, as well as imaging and sensing applications for circularly polarized light with a highly integrated photonic platform.
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