In-plane magnetic field dependence of cyclotron resonance in two-dimensional electron system

The in-plane magnetic field dependence of cyclotron resonance is measured both in single and double layer 2DES. In particular. we observe that the in-plane dependence of cyclotron mass in single-layer 2DES changes with carrier density and perpendicular magnetic field in the low electron density sample, which cannot be explained by the semiclassical calculation. (C) 2002 Elsevier Science B.V. All rights reserved.