Study of the optimal photoresponse, speed, and temperature performance of terahertz photoelectric tunable-step detectors

Ran Chen; Ruqiao Xia; Jonathan Griffiths; Harvey E. Beere; David A. Ritchie; Wladislaw Michailow

doi:10.1117/12.3031552

15 November 2024 Study of the optimal photoresponse, speed, and temperature performance of terahertz photoelectric tunable-step detectors

Ran Chen, Ruqiao Xia, Jonathan Griffiths, Harvey E. Beere, David A. Ritchie, Wladislaw Michailow

Author Affiliations +

Proceedings Volume 13203, Sensors and Communication Technologies in the 1 GHz to 10 THz Band; 1320309 (2024) https://doi.org/10.1117/12.3031552
Event: Security + Defence, 2024, Edinburgh, United Kingdom

Abstract

A GaAs/AlGaAs-based photoelectric tunable-step (PETS) terahertz (THz) detector with a symmetric dipole antenna is demonstrated in this work as a model system to carry out a systematic study of the in-plane photoelectric effect. We derive the optimal values for the antenna gap, depth of the 2DEG, and other geometrical parameters from numerical simulations, and fabricate a detector with optimized dimensions. It shows a high responsivity (˜2.5 kV/W) to 1.9-THz radiation with a short response time (˜2 μs). The temperature dependence of the photoresponse of the PETS detector shows a capability of operating up to 75 K. The results of this work deepen the understanding of the in-plane photoelectric effect and provide a universal reference for the design of future high responsivity, fast PETS THz detectors operating at high temperatures.

Conference Presentation

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

Citation Download Citation

Ran Chen, Ruqiao Xia, Jonathan Griffiths, Harvey E. Beere, David A. Ritchie, and Wladislaw Michailow "Study of the optimal photoresponse, speed, and temperature performance of terahertz photoelectric tunable-step detectors", Proc. SPIE 13203, Sensors and Communication Technologies in the 1 GHz to 10 THz Band, 1320309 (15 November 2024); https://doi.org/10.1117/12.3031552

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