Low dimensional carrier confinement structure grown on patterned GaAs(111)A substrates by molecular beam epitaxy
Low-dimensional carrier confinement structures have been grown on patterned GaAs(111)A substrates with (311)A sidewalls by a single-step molecular beam epitaxy growth of a Si-doped GaAs layer. The method is based on the amphoteric nature of Si dopants in GaAs growth; the confined (111)A region is p-type and the (311) sidewalls are n-type. The confinement structures are confirmed by observing their cathodoluminescence spectra. The reduced confinement structure is confirmed by currentvoltage measurements with an atomic force microscope.
carrier confinement gaas(111)a molecular beam epitaxy si-doping