A dual-polarization mode terahertz modulator based on metamaterial and HEMT structures

Longliang Yang; Yong Ma; Wu Pan; Zhen Zhang; Jincheng He; Yi Liu; Huan Yang; Xingye Zhou; Jiacheng Liu; Yuhang Han; Qianwen Xu

doi:10.1117/12.2606697

24 November 2021 A dual-polarization mode terahertz modulator based on metamaterial and HEMT structures

Longliang Yang, Yong Ma, Wu Pan, Zhen Zhang, Jincheng He, Yi Liu, Huan Yang, Xingye Zhou, Jiacheng Liu, Yuhang Han, Qianwen Xu

Author Affiliations +

Proceedings Volume 12061, AOPC 2021: Infrared Device and Infrared Technology; 120611E (2021) https://doi.org/10.1117/12.2606697
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

In this paper, we reported the design, fabricate, and characterize of an electronically controlled terahertz (THz) amplitude modulator composed of a four-open ring metamaterial structure and a high electron mobility transistor (HEMT) structure, HEMT area is located at the openings of the four-opening ring metamaterial structure. The concentration of 2D electron gas of the HEMT is adjusted by applying an external electrical field and results in the resonance shifts. Both static and dynamic characterizations of the modulator were carried out by using an optical fiber-coupled terahertz time-domain spectroscopy (THz-TDS) system in the transmission type. Experimental results show that the amplitude modulator can modulate the incident THz waves with two orthogonal polarization directions. The modulation depths are 56% at 0.32 THz for vertical polarized beam and 40% at 0.34 for horizontal polarized beam respectively. The modulator has potential application in wireless communication and real-time imaging.

Citation Download Citation

Longliang Yang, Yong Ma, Wu Pan, Zhen Zhang, Jincheng He, Yi Liu, Huan Yang, Xingye Zhou, Jiacheng Liu, Yuhang Han, and Qianwen Xu "A dual-polarization mode terahertz modulator based on metamaterial and HEMT structures", Proc. SPIE 12061, AOPC 2021: Infrared Device and Infrared Technology, 120611E (24 November 2021); https://doi.org/10.1117/12.2606697

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available