Far infrared emission from magnetically quantised 2DEGs in GaAs/(AlGa)As heterojunctions

We present the first studies of far infrared cyclotron emission from magnetically quantised 2DEGs made using a broad band detector. Spectral resolution was obtained using the substrate as a Fabry-Pérot etalon together with a low pass filter. Information was obtained on the intensity in fields up to...

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Bibliographic Details
Published in:Surface science 1994-03, Vol.305 (1), p.280-284
Main Authors: Zinov'ev, N.N., Fletcher, R., Challis, L.J., Sujak-Cyrul, B., Akimov, A.V., Jezierski, A.F.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Iii-v and ii-vi semiconductors
Iii-v semiconductors
Infrared and raman spectra and scattering
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Physics
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Summary:We present the first studies of far infrared cyclotron emission from magnetically quantised 2DEGs made using a broad band detector. Spectral resolution was obtained using the substrate as a Fabry-Pérot etalon together with a low pass filter. Information was obtained on the intensity in fields up to 3 T and currents up to 600 microA. The experiments demonstrate that the system is well adapted for investigating the electron temperatures as a function of magnetic field. They also show that 20–30% of the emission occurs at frequencies significantly less than ω c .
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(94)90901-6