Xu, WenLewis, RKoenraad, PLangerak, C2015-12-132015-12-130953-8984http://hdl.handle.net/1885/80656We present a combined experimental and theoretical study of interactions between two-dimensional electron gases (2DEGs) and terahertz (THz) free-electron lasers in the presence of quantizing magnetic fields. It is found both experimentally and theoretically that when an intense THz field and a quantizing magnetic field are applied simultaneously to a GaAs-based 2DEG in the Faraday geometry, a strong cyclotron resonance (CR) effect on top of the magnetophonon resonances can be observed by transport measurements at relatively high temperatures. With increasing radiation intensity and/or decreasing temperature, the peaks of the CR are broadened and split due to magnetophoton-phonon scattering.Keywords: Cyclotron resonance; Free electron lasers; Infrared spectrometers; Light emission; Magnetic field effects; Photoconductivity; Scattering; Farady geometry; Terahertz laser fields; Electron gas200410.1088/0953-8984/16/1/0092015-12-11