Optically detected cyclotron resonance on GaAs/${\mathrm{Al}}_{\mathit{x}}$${\mathrm{Ga}}_{1\mathrm{-}\mathit{x}}$As quantum wells and quantum wires

GaAs/${\mathrm{Ga}}_{\mathit{x}}$${\mathrm{Al}}_{1\mathrm{-}\mathit{x}}$As quantum wells and quantum wires were studied by microwave modulation of the photoluminescence (MMPL) and optically detected cyclotron resonance (ODCR). It is shown that the MMPL signal is enhanced under cyclotron resonance conditions of the electrons. The energy transfer to the luminescence is thermal by heating the crystal lattice. The ODCR experiments allowed us to determine selectively the effective masses and mobilities of electrons confined in an 80-Å quantum well, in nominally 80-nm-wide quantum wires prepared by a shallow etching technique structuring the 80-Å quantum well, and an inversion channel formed at a superlattice/buffer layer interface.