Cyclotron absorption in two-dimensional electron systems monitored by terahertz time-domain spectroscopy

We have measured the far-infrared cyclotron absorption of a two-dimensional electron systems (2DES), formed in a GaAs/Al 0.33 Ga 0.67 As heterojunction, using transmission-mode terahertz (THz) time-domain spectroscopy. The frequency of cyclotron absorption was proportional to applied magnetic field...

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Bibliographic Details
Published in2007 Joint 32nd International Conference on Infrared and Millimeter Waves and the 15th International Conference on Terahertz Electronics pp. 488 - 489
Main Authors Upadhya, P.C., Cunningham, J.E., Tiang, C.K., Lachab, M., Khanna, S.P., Linfield, E.H., Davies, A.G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2007
Subjects
Absorption
cyclotron resonance (CR)
Cyclotrons
electron scattering
Electrons
Gallium arsenide
Heterojunctions
Magnetic field measurement
Monitoring
Spectroscopy
Submillimeter wave measurements
terahertz spectroscopy
Time domain analysis
time-domain
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Summary:We have measured the far-infrared cyclotron absorption of a two-dimensional electron systems (2DES), formed in a GaAs/Al 0.33 Ga 0.67 As heterojunction, using transmission-mode terahertz (THz) time-domain spectroscopy. The frequency of cyclotron absorption was proportional to applied magnetic field (B-field) across the measurement range, and from this data, the electron effective mass was extracted. The temperature-dependence of the cyclotron absorption was also studied between 1.5-150 K, allowing the dynamics of electron scattering in the 2D electron system to be determined.
ISBN:1424414385
9781424414383
ISSN:2162-2027
DOI:10.1109/ICIMW.2007.4516595