Large-range continuously adjustable low-loss terahertz phase shifter

Rong Cong; Hang Ren; Zhao-Hua Xu; Su Xu

doi:10.1117/12.3023749

18 March 2024 Large-range continuously adjustable low-loss terahertz phase shifter

Rong Cong, Hang Ren, Zhao-Hua Xu, Su Xu

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 1310466 (2024) https://doi.org/10.1117/12.3023749
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

The research and development of terahertz (THz) communication systems and related key devices are of great significance in promoting the development of next-generation wireless communication technology. As one of the key components in THz communication, tunable THz phase shifters have been extensively and deeply studied. The implementation of THz phase shifters mainly relies on material properties and advanced processing techniques, including liquid crystal phase shifters, graphene phase shifters, micro-electromechanical systems (MEMS) phase shifters, and InP substrate phase shifters, among others. However, in the current research, the performance parameters of reported THz phase shifters, such as bandwidth, insertion loss, phase shift range, and tuning continuity, are often difficult to achieve optimal optimization simultaneously. Specifically, phase shifters based on resonant or quasi-resonant systems have limited bandwidth and are sensitive to material losses, resulting in higher insertion loss. On the other hand, as the phase shift range increases, graphene or two-dimensional electron gas microstructures can cause more insertion losses. This paper presents a remarkably efficient and lossless technique for phase-shifting in on-chip THz systems. An all-silicon-based self-supported low-loss and wide-range tunable THz phase shifter operating in the frequency range of 0.12-0.13 THz is proposed. This method has important implications for the advanced THz systems.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rong Cong, Hang Ren, Zhao-Hua Xu, and Su Xu "Large-range continuously adjustable low-loss terahertz phase shifter", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 1310466 (18 March 2024); https://doi.org/10.1117/12.3023749

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KEYWORDS

Phase shifts

Terahertz radiation

Refractive index

Silicon

Phase shifting

Waveguides

Electric fields

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