期刊
APPLIED PHYSICS LETTERS
卷 112, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5028401
关键词
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资金
- National Program on Key Basic Research Project of China (973 Program) [2014CB339806]
- Major National Development Project of Scientific Instrument and Equipment [2017YFF0106300, 2016YFF0100503]
- Natural Science Foundation of Shanghai [18ZR1425600]
- State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, China [2018GZKF03004]
- National Natural Science Foundation of China [61307126, 61722111]
- Key Scientific and Technological Project of Science and Technology Commission of Shanghai Municipality [15DZ0500102]
- Shanghai leading talent [2016-019]
- Young Yangtse Rive Scholar [Q2016212]
- Shanghai international joint laboratory project [17590750300]
Terahertz beam splitters and polarization rotators are two typical devices with wide applications ranging from terahertz communication to system integration. However, they are faced with severe challenges in manipulating THz waves in multiple channels, which is desirable for system integration and device miniaturization. Here, we propose a method to design ultra-thin multi-channel THz beam splitters and polarization rotators simultaneously. The reflected beams are divided into four beams with nearly the same density under illumination of linear-polarized THz waves, while the polarization of reflected beams in each channel is modulated with a rotation angle or invariable with respect to the incident THz waves, leading to the multi-channel polarization rotator (multiple polarization rotation in the reflective channels) and beam splitter, respectively. Reflective metasurfaces, created by patterning metal-rods with different orientations on a polyimide film, were fabricated and measured to demonstrate these characteristics. The proposed approach provides an efficient way of controlling polarization of THz waves in various channels, which significantly simplifies THz functional devices and the experimental system. Published by AIP Publishing.
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