Open AccessCyclotron resonance spectroscopy in a high mobility two dimensional electron gas using characteristic matrix methods
Author(s) -
David Hilton
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.029717
Subject(s) - dephasing , spectroscopy , cyclotron , cyclotron resonance , optics , materials science , nuclear magnetic resonance , terahertz radiation , electron , atomic physics , physics , analytical chemistry (journal) , chemistry , condensed matter physics , quantum mechanics , chromatography
We develop a new characteristic matrix-based method to analyze cyclotron resonance experiments in high mobility two-dimensional electron gas samples where direct interference between primary and satellite reflections has previously limited the frequency resolution. This model is used to simulate experimental data taken using terahertz time-domain spectroscopy that show multiple pulses from the substrate with a separation of 15 ps that directly interfere in the time-domain. We determine a cyclotron dephasing lifetime of 15.1 ± 0.5 ps at 1.5 K and 5.0 ± 0.5 ps at 75 K.