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Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance

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

Nanophotonics (Berlin, Germany), 2024-04, Vol.13 (10), p.1917-1928 [Periódico revisado por pares]

Berlin: De Gruyter

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Título:
Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance
Autor: Chen, Ran ; Xia, Ruqiao ; Griffiths, Jonathan ; Beere, Harvey E. ; Ritchie, David A. ; Michailow, Wladislaw
Assuntos: Detectors ; Dipole antennas ; Electric fields ; far-infrared detection ; Field effect transistors ; Figure of merit ; Heterojunctions ; in-plane photoelectric effect ; Operating temperature ; Parameters ; Photoelectric effect ; photoelectric tunable-step detector ; Photoelectricity ; Quantum phenomena ; Radiation ; Radiation effects ; Semiconductor devices ; Sensors ; two-dimensional electron gas
É parte de: Nanophotonics (Berlin, Germany), 2024-04, Vol.13 (10), p.1917-1928
Descrição: Field effect transistors have shown promising performance as terahertz (THz) detectors over the past few decades. Recently, a quantum phenomenon, the in-plane photoelectric effect, was discovered as a novel detection mechanism in gated two-dimensional electron gases (2DEGs), and devices based on this effect, photoelectric tunable-step (PETS) THz detectors, have been proposed as sensitive THz detectors. Here, we demonstrate a PETS THz detector based on GaAs/AlGaAs heterojunction using a dipole antenna. We investigate the dependence of the in-plane photoelectric effect on parameters including the dimensions and the operating temperature of the device. Two figures of merit within the 2DEG, the maximum electric field and the radiation-induced ac-potential difference, are simulated to determine the optimal design of the PETS detector antenna. We identify the optimal antenna gap size, metal thickness, and 2DEG depth, and demonstrate the first PETS detector with a symmetric dipole antenna, which shows high-speed detection of 1.9 THz radiation with a strong photoresponse. Our findings deepen the understanding of the in-plane photoelectric effect and provide a universal guidance for the design of future PETS THz detectors.
Editor: Berlin: De Gruyter
Idioma: Inglês

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Photoelectric tunable-step terahertz detectors: a study on optimal antenna parameters, speed, and temperature performance

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

Berlin: De Gruyter

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