Towards broadband, low-capacitance, far-infrared photoelectric tunable-step detectors

Matthew Tan; Harvey E. Beere; David A. Ritchie; Wladislaw Michailow

doi:10.1117/12.3027619

1 October 2024 Towards broadband, low-capacitance, far-infrared photoelectric tunable-step detectors

Matthew Tan, Harvey E. Beere, David A. Ritchie, Wladislaw Michailow

Proceedings Volume 13141, Terahertz Emitters, Receivers, and Applications XV; 1314108 (2024) https://doi.org/10.1117/12.3027619
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

A new quantum phenomenon, the in-plane photoelectric effect, has recently been discovered as a mechanism of far-infrared (FIR) photoresponse generation in a two-dimensional electron gas (2DEG). This effect has shown promise for terahertz (THz) detection due to its high photoconversion efficiency and a lack of an intrinsic response time limit. Initial detectors utilizing the in-plane photoelectric effect, known as Photoelectric Tunable-Step (PETS) detectors, have been developed and demonstrated to work as high-sensitivity FIR detectors. Here, we propose a PETS detector utilising a novel, broadband antenna adopted from a wide bow-tie geometry that minimizes the area of 2DEG covered by the antenna. We demonstrate experimentally a large photoresponse to 2.0 THz radiation of an AlGaAs/GaAs heterojunction-based PETS detector with our novel antenna design. Under the same operating conditions, this detector shows much larger photocurrent and two-times improvement in rise time compared to an identical PETS detector fabricated simultaneously on the same chip but instead incorporating a bow-tie antenna. Our findings help facilitate the development of future high-speed, low-noise, ultra-sensitive FIR detector arrays.

Conference Presentation

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

Citation Download Citation

Matthew Tan, Harvey E. Beere, David A. Ritchie, and Wladislaw Michailow "Towards broadband, low-capacitance, far-infrared photoelectric tunable-step detectors", Proc. SPIE 13141, Terahertz Emitters, Receivers, and Applications XV, 1314108 (1 October 2024); https://doi.org/10.1117/12.3027619

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