Observation of double cyclotron resonance in modulation-δ-doped In0.52Al0.48As/In0.53Ga0.47As heterostructure by optical detection
Journal
Applied Physics Letters
Journal Volume
68
Journal Issue
8
Pages
1117-1119
Date Issued
1996
Author(s)
Abstract
We report an investigation of optical and electronic properties of a two-subband populated electron gas confined at a δ-doped Al0.48In0.52As/Ga0.47In0.53As heterostructure by the technique of far-infrared optically detected cyclotron resonance (ODCR). Oscillatory characteristics are observed in the ODCR spectrum, and interpreted in terms of the crossing between the Landau levels of the two-dimensional electron gas and the Fermi level from which the electron concentration and effective mass of the first and second subbands can be determined. Quite different effective masses associated with these subbands are obtained, reflecting the strong effects of conduction band nonparabolicity as well as polaron coupling in Ga0.47In0.53As quantum well. © 1996 American Institute of Physics.
Type
journal article