Fabrication of GaAs arrowhead-shaped quantum wires by metalorganic chemical vapor deposition selective growth

Abstract

We fabricated GaAs arrowhead-shaped quantum wires utilizing both the selective growth technique and the difference in the stabilized crystal facet between GaAs and Al0.4Ga0.6As; the stabilized facet of the GaAs layer is (111)A and that of the Al0.4Ga0.6As layer is (311)A. A systematic change in the size of the quantum wire exhibits blue shifts of the photoluminescence peak, which is due to enhancement of the two-dimensional quantum confinement effect.