H. Gao, W. Miao, Z. Wang, W. Zhang, Y. Geng, S. C. Shi, C. Yu, Z. Z. He, Q. B. Liu, Z. H, Feng
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10826/108260X/Characterization-of-a-graphene-based-terahertz-hot-electron-bolometer/10.1117/12.2500700.short?SSO=1
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.
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