Corbino field-effect transistors in a magnetic field:Highly tunable photodetectors

Winstanley, B. and Schomerus, H. and Principi, A. (2021) Corbino field-effect transistors in a magnetic field:Highly tunable photodetectors. Physical review B, 104 (16). ISSN 1098-0121

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Abstract

We study gated field-effect transistors (FETs) with an eccentric Corbino-disk geometry, such that the drain spans its circumference while the off-center inner ring acts as a source. An alternating current terahertz potential difference is applied between source and gate while a static source-drain voltage, rectified by the nonlinearities of FET electrons, is measured. When a magnetic field is applied perpendicular to the device, a strong resonance appears at the cyclotron frequency. The strength of the resonance can be tuned by changing the eccentricity of the disk. We show that there is an optimum value of the eccentricity that maximizes the responsivity of the FET.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
© 2021 American Physical Society
ID Code:
161336
Deposited By:
Deposited On:
25 Oct 2021 09:05
Refereed?:
Yes
Published?:
Published
Last Modified:
05 Dec 2021 08:33