Direct Measurement of Cyclotron Coherence Times of High-Mobility Two-Dimensional Electron Gases

Autor:	Wang, X., Hilton, D. J., Reno, J. L., Mittleman, D. M., Kono, J.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Optics Express 18, 12354 (2010)
Druh dokumentu:	Working Paper
DOI:	10.1364/OE.18.012354
Popis:	We have observed long-lived (~30 ps) coherent oscillations of charge carriers due to cyclotron resonance (CR) in high-mobility two-dimensional electrons in GaAs in perpendicular magnetic fields using time-domain terahertz spectroscopy. The observed coherent oscillations were fitted well by sinusoids with exponentially-decaying amplitudes, through which we were able to provide direct and precise measures for the decay times and oscillation frequencies simultaneously. This method thus overcomes the CR saturation effect, which is known to prevent determination of true CR linewidths in high-mobility electron systems using Fourier-transform infrared spectroscopy. Comment: 7 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1003.2795 Zobrazit plný text záznamu View this record from Arxiv