RESEARCH ARTICLE

An all-silicon design of a high-efficiency broadband transmissive terahertz polarization convertor

  • Xiaohua Xing ,
  • Die Zou ,
  • Xin Ding ,
  • Jianquan Yao ,
  • Liang Wu
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  • College of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China
wuliang@tju.edu.cn

Received date: 05 Oct 2023

Accepted date: 03 Nov 2023

Copyright

2023 The Author(s) 2023

Abstract

Polarization, a fundamental behavior of electromagnetic waves, holds immense potential across diverse domains such as environmental monitoring, biomedicine, and ocean exploration. However, achieving efficient modulation of terahertz waves with wide operational bandwidth poses significant challenges. Here, we introduce an all-silicon polarization converter designed specifically to operate in the terahertz range of the electromagnetic spectrum. Simulation results demonstrate that the average conversion efficiency of cross-linear waves exceeds 80% across a wide frequency range spanning from 1.00 to 2.32 THz, with the highest conversion efficiency peaking at an impressive 99.97%. Additionally, our proposed structure facilitates linear-to-circular polarization conversion with an ellipticity of 1 at 0.85 THz. Furthermore, by rotating the cross-shaped microstructure, active control over arbitrary polarization states can be achieved. To summarize, the proposed structure offers remarkable flexibility and ease of integration, providing a reliable and practical solution for achieving broadband and efficient polarization conversion of terahertz waves.

Cite this article

Xiaohua Xing , Die Zou , Xin Ding , Jianquan Yao , Liang Wu . An all-silicon design of a high-efficiency broadband transmissive terahertz polarization convertor[J]. Frontiers of Optoelectronics, 2023 , 16(4) : 40 . DOI: 10.1007/s12200-023-00098-9

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