title: Cyclotron resonance spectroscopy in a high mobility two dimensional electron gas using characteristic matrix methods.
abstract: 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.
authors: Department of Physics, The University of Alabama at Birmingham, Birmingham, AL 35294-1170 USA. dhilton@uab.edu
authors: David J
authors: DJ
authors: Hilton