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Author
Shangina, E. L.
;
Smirnov, K. V.
;
Morozov, D. V.
;
Kovalyuk, V. V.
;
Gol’tsman, G. N.
;
Verevkin, A. A.
;
Toropov, A. I.
Title
Frequency bandwidth and conversion loss of a semiconductor heterodyne receiver with phonon cooling of two-dimensional electrons
Type
Journal Article
Year
2010
Publication
Semicond.
Abbreviated Journal
Semicond.
Volume
44
Issue
11
Pages
1427-1429
Keywords
2DEG, AlGaAs/GaAs heterostructures mixers
Abstract
The temperature and concentration dependences of the frequency bandwidth of terahertz heterodyne AlGaAs/GaAs detectors based on hot electron phenomena with phonon cooling of two-dimensional electrons have been measured by submillimeter spectroscopy with a high time resolution. At a temperature of 4.2 K, the frequency bandwidth at a level of 3 dB (f 3 dB) is varied from 150 to 250 MHz with a change in the concentration n s according to the power law f 3dB ∝ n −0.5 s due to the dominant contribution of piezoelectric phonon scattering. The minimum conversion loss of the semiconductor heterodyne detector is obtained in structures with a high carrier mobility (μ > 3 × 105 cm2 V−1 s−1 at 4.2 K).
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ISSN
1063-7826
ISBN
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Conference
Notes
Полоса и потери преобразования полупроводникового смесителя с фононным каналом охлаждения двумерных электронов
Approved
no
Call Number
Serial
1216
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