We report on the experimental observation of the quantum oscillations in microwave magnetoabsorption of a high-mobility two-dimensional electron gas induced by Landau quantization. Using original resonance-cavity technique, we observe two kinds of oscillations in the magnetoabsorption originating from inter-Landau-level and intra-Landau-level transitions. The experimental observations are in full accordance with theoretical predictions. Presented theory also explains why similar quantum oscillations are not observed in transmission and reflection experiments on high-mobility structures despite of very strong effect of microwaves on the dc resistance in the same samples.
@article{arxiv.1006.0319,
title = {Quantum oscillations in the microwave magnetoabsorption of a 2D electron gas},
author = {O. M. Fedorych and M. Potemski and S. A. Studenikin and J. A. Gupta and Z. R. Wasilewski and I. A. Dmitriev},
journal= {arXiv preprint arXiv:1006.0319},
year = {2010}
}