Novel far‐infrared‐photoconductor based on photon‐induced interedge channel scattering
作者:
E. Dießel,
G. Mu¨ller,
D. Weiss,
K. von Klitzing,
K. Ploog,
H. Nickel,
W. Schlapp,
R. Lo¨sch,
期刊:
Applied Physics Letters
(AIP Available online 1991)
卷期:
Volume 58,
issue 20
页码: 2231-2233
ISSN:0003-6951
年代: 1991
DOI:10.1063/1.104935
出版商: AIP
数据来源: AIP
摘要:
We demonstrate experimentally that the far‐infrared photoresponse of GaAs/AlGaAs heterostructures at photon energies corresponding to cyclotron resonance absorption is strongly enhanced in the adiabatic transport regime of the quantum Hall effect (QHE). Ideal adiabatic transport is characterized within the edge channel picture of the QHE by the absence of interedge channel scattering. We realize adiabatic transport by the means of a multiple gate finger structure, which is used for a selective population of the edge channels. The cyclotron resonance absorption is interpreted as an additional interchannel scattering process increasing the magnetoresistance.
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