Coupled cyclotron resonance transitions of bilayer 2DEG systems in GaAs

Electron cyclotron resonances in bilayer quasi two-dimensional electron sys tems are examined in the extreme magnetic quantum limit. The variation of t he resonance frequencies with electron density strongly depends on the thic kness of the barrier between the two layers. In samples with sufficiently t hin barriers there is strong evidence for the presence of interlayer Coulom b coupling and influences of wavefunction delocalization effects. (C) 1998 Elsevier Science B.V. All rights reserved.