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Proceedings Paper

Orbit angular momentum encoding at 0.3 THz via 3D printed spiral phase plates
Author(s): Xuli Wei; Changming Liu; Zhongqi Zhang; Long Zhu; Jian Wang; Kejia Wang; Zhenggang Yang; Jinsong Liu
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Paper Abstract

Terahertz wave carrying OAM would boost the capacity of free-space communication with a high carrier frequency and additional degrees of freedom. In this work, we present a experimental demonstration of THz orbital angular momentum (OAM) encoding via 3D printed spiral phase plates(SPPs). By using four “coding” spps with toplogical values -2, - 1,+1,+2, we can encode OAM information onto THz waves and generate temporal varying OAM states with controlled sequences (i.e., 2-bit coding). By using interference between OAM beam and a reference gaussian beam, the OAM information can be detected from the interference fork pattern.

Paper Details

Date Published: 11 November 2014
PDF: 6 pages
Proc. SPIE 9275, Infrared, Millimeter-Wave, and Terahertz Technologies III, 92751P (11 November 2014); doi: 10.1117/12.2085083
Show Author Affiliations
Xuli Wei, Huazhong Univ. of Science and Technology (China)
Changming Liu, Huazhong Univ. of Science and Technology (China)
Zhongqi Zhang, Huazhong Univ. of Science and Technology (China)
Long Zhu, Huazhong Univ. of Science and Technology (China)
Jian Wang, Huazhong Univ. of Science and Technology (China)
Kejia Wang, Huazhong Univ. of Science and Technology (China)
Zhenggang Yang, Huazhong Univ. of Science and Technology (China)
Jinsong Liu, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 9275:
Infrared, Millimeter-Wave, and Terahertz Technologies III
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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