Ballistic cooling in a wideband two-dimensional electron gas bolometric mixer
- 12 August 2002
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 81 (7) , 1243-1245
- https://doi.org/10.1063/1.1500429
Abstract
We show that bolometric mixers fabricated from a high mobility two-dimensional electron gas can reach a regime where electron energy relaxation is dominated by ballistic, rather than diffusive, outflow of excited electrons. This ballistic cooling mechanism establishes the maximum physical limit on mixer speed for a transit-time limited device. Intermediate frequency bandwidths of nearly 40 GHz have been obtained in devices with channel lengths >1 μm in ballistically cooled devices.Keywords
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