Orbit angular momentum encoding at 0.3 THz via 3D printed spiral phase plates

Xuli Wei; Changming Liu; Zhongqi Zhang; Long Zhu; Jian Wang; Kejia Wang; Zhenggang Yang; Jinsong Liu

doi:10.1117/12.2085083

11 November 2014 Orbit angular momentum encoding at 0.3 THz via 3D printed spiral phase plates

Xuli Wei, Changming Liu, Zhongqi Zhang, Long Zhu, Jian Wang, Kejia Wang, Zhenggang Yang, Jinsong Liu

Proceedings Volume 9275, Infrared, Millimeter-Wave, and Terahertz Technologies III; 92751P (2014) https://doi.org/10.1117/12.2085083
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

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.

Citation Download Citation

Xuli Wei, Changming Liu, Zhongqi Zhang, Long Zhu, Jian Wang, Kejia Wang, Zhenggang Yang, and Jinsong Liu "Orbit angular momentum encoding at 0.3 THz via 3D printed spiral phase plates", Proc. SPIE 9275, Infrared, Millimeter-Wave, and Terahertz Technologies III, 92751P (11 November 2014); https://doi.org/10.1117/12.2085083

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