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Abstract

A novel THz photomixer detector based on interdigitated multilayer graphene (MLG) on low-temperature-grown (LTG) GaAs is demonstrated. It exhibits an enhanced performance as compared with conventional LTG GaAs photomixers with metallic finger contacts. The obtained responsivity and the dynamic range are about 30× higher and the bandwidth is twice as large. The reason for this enormous improvement lies in the transparency of the graphene electrodes to VIS/NIR radiation which permits to optically excite mobile charge carriers in the LTG GaAs not only between the electrode fingers, but also below them. The measured enhancement of the detected photocurrent is explained by model calculations and simulations.

Original languageEnglish
Title of host publication2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
PublisherInstitute of Electrical and Electronics Engineers
Number of pages2
ISBN (Electronic)979-8-3503-3660-3
DOIs
Publication statusPublished - 31 Oct 2023
Event48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023 - Montreal, Canada
Duration: 17 Sept 202322 Sept 2023

Conference

Conference48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
Country/TerritoryCanada
CityMontreal
Period17/09/2322/09/23

Funding

ACKNOWLEDGMENT This work was financially supported by The Eindhoven Hendrik Casimir Institute (EHCI), one of the four research institutes of the Eindhoven University of Technology, through the EHCI Open Call for Collaborative Projects.

FundersFunder number
Eindhoven Hendrik Casimir institute
Eindhoven University of Technology

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