Characterization of a graphene-based terahertz hot-electron bolometer

H. Gao; W. Miao; Z. Wang; W. Zhang; Y. Geng; S. C. Shi; C. Yu; Z. Z. He; Q. B. Liu; Z. H, Feng

doi:10.1117/12.2500700

7 December 2018 Characterization of a graphene-based terahertz hot-electron bolometer

H. Gao, W. Miao, Z. Wang, W. Zhang, Y. Geng, S. C. Shi, C. Yu, Z. Z. He, Q. B. Liu, Z. H, Feng

Proceedings Volume 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V; 108260X (2018) https://doi.org/10.1117/12.2500700
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

Graphene has an extremely weak coupling of electrons to phonons due to its nonionic character of lattice. This remarkable property makes graphene very attractive for hot electron bolometers (HEBs). In this paper, we present the development of a graphene-based terahertz hot electron bolometer (HEB) with Johnson noise readout. The HEB is essentially a graphene microbridge that is connected to a log spiral antenna by Au contact pads. We study the responsivity, noise equivalent power (NEP) and time constant of the graphene-based HEB in a perpendicular magnetic field. In order to understand the thermal transport inside the graphene microbridge, we also measure the graphene-based HEB at different bath temperatures between 3 K and 10 K. Detailed experimental results and analysis will be presented.

Citation Download Citation

H. Gao, W. Miao, Z. Wang, W. Zhang, Y. Geng, S. C. Shi, C. Yu, Z. Z. He, Q. B. Liu, and Z. H, Feng "Characterization of a graphene-based terahertz hot-electron bolometer", Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 108260X (7 December 2018); https://doi.org/10.1117/12.2500700

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