Ballistic cooling in a wideband two-dimensional electron gas bolometric mixer

Mark Lee; L. N. Pfeiffer; K. W. West

doi:10.1063/1.1500429

Ballistic cooling in a wideband two-dimensional electron gas bolometric mixer

Mark Lee, L. N. Pfeiffer, K. W. West

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1243-1245
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	7
DOIs	https://doi.org/10.1063/1.1500429
State	Published - Aug 12 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1500429

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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.",

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N2 - 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.

AB - 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.

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Ballistic cooling in a wideband two-dimensional electron gas bolometric mixer

Abstract

All Science Journal Classification (ASJC) codes

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