期刊
APPLIED PHYSICS LETTERS
卷 112, 期 20, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5029507
关键词
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资金
- National Science Foundation of China [61631007, 61571117, 61138001, 61371035, 61722106, 61731010, 11227904]
- 111 Project [111-2-05]
- Natural Science Foundation of Jiangsu Province [BK20150020]
We propose a strategy to convert a linearly polarized wave from a single point source to an orbital angular momentum (OAM) wave by arbitrary polarization via an anisotropic frequency selective surface (FSS) in the microwave frequency. By tailoring the geometries of FSS elements, reflectionphases in x and y polarizations are engineered and encoded independently, which allows us to design the eventual polarization state of the generated OAM vortex beam by elaborately selecting individual coding sequences for each polarization. Two types of FSSs are designed and experimentally characterized to demonstrate the capability of OAM generation with circular and linear polarizations, respectively, showing excellent performance in a wide bandwidth from 14 to 16 GHz. This method provides opportunities for polarization multiplexing in microwave OAM communication systems. Published by AIP Publishing.
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