Wj. Walecki et al., TERAHERTZ ELECTROMAGNETIC TRANSIENTS AS PROBES OF A 2-DIMENSIONAL ELECTRON-GAS, Applied physics letters, 63(13), 1993, pp. 1809-1811
We demonstrate the application of terahertz electromagnetic transients
to the study of the dynamical conductivity of a two-dimensional, high
mobility electron gas in modulation-doped GaAs quantum wells. The tra
nsient response of such an electron system on a picosecond time scale
occurs in a regime where the implications of electron-electron interac
tion effects need be considered.