INTERFACE PHENOMENA AND OPTICAL-PROPERTIES OF STRUCTURALLY CONFINED INP QUANTUM-WIRE ENSEMBLES

Three-dimensional regular ensembles of InP quantum wires have been pro duced in channels of porous dielectric matrices by metal-organic chemi cal vapor deposition. These matrices differ both in the diameter of th e channels (0.7, 3, and 8 nm) and in their spatial arrangement. The In P layer thickness does not exceed two-three monolayers. A comparative study of Raman, optical absorption, and photoluminescence spectra reve aled the dependence of the optical properties of these quantum wires o n interface effects, namely, atomic interaction in the wires, wire-mat rix, and wire-wire interactions. It is shown that the wire-matrix inte raction distorts the InP lattice, broadens the wire electronic density -of-states spectrum in the vicinity of the fundamental gap, and redist ributes the relaxation of photoinduced excitations among states belong ing to the wire itself and to defects in the matrix bound to the wire. (C) 1997 American Institute of Physics.