Investigation of the influence of antenna geometry on terahertz photoelectric tunable-step detector performance

Ran Chen; Nikita W. Almond; Harvey E. Beere; David A. Ritchie; Wladislaw Michailow

doi:10.1117/12.2679876

17 October 2023 Investigation of the influence of antenna geometry on terahertz photoelectric tunable-step detector performance

Ran Chen, Nikita W. Almond, Harvey E. Beere, David A. Ritchie, Wladislaw Michailow

Author Affiliations +

Proceedings Volume 12740, Emerging Imaging and Sensing Technologies for Security and Defence VIII; 127400I (2023) https://doi.org/10.1117/12.2679876
Event: SPIE Security + Defence, 2023, Amsterdam, Netherlands

Abstract

A novel, quantum mechanism, the in-plane photoelectric effect, which enables a large terahertz (THz) photoresponse in gated two-dimensional electron gases (2DEGs), was recently discovered. To develop the mechanism further, a systematic study is carried out in this work using a dual-gated photoelectric tunable-step (PETS) terahertz detector based on a GaAs-AlGaAs heterojunction. The electric field distribution within the 2DEG channel is simulated and integrated to obtain the radiation-induced ac potential difference as a function of the 2DEG depth and the gap size to investigate the parameter dependence of the THz photoresponse. Based on the simulation results, we design, optimize, and fabricate a dipole-antenna PETS THz detector with 2DEG depth d = 90 nm and gap size b = 190 nm, which shows a strong photoresponse to 1.9 THz radiation.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ran Chen, Nikita W. Almond, Harvey E. Beere, David A. Ritchie, and Wladislaw Michailow "Investigation of the influence of antenna geometry on terahertz photoelectric tunable-step detector performance", Proc. SPIE 12740, Emerging Imaging and Sensing Technologies for Security and Defence VIII, 127400I (17 October 2023); https://doi.org/10.1117/12.2679876

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