NONLINEAR-OPTICAL EFFECTS IN STRAIN-INDUCED LATERALLY ORDERED (INP)(2) (GAP)(2) QUANTUM WIRES/

The nonlinear optical properties of a (InP)(2)/(GaP)(2) bilayer superl attice structure have been examined with linearly polarized cathodolum inescence spectroscopy. Transmission electron microscopy showed a comp osition modulation with a period of similar to 800 Angstrom along the [110] direction, which occurs spontaneously during the growth, resulti ng in coherently strained quantum wires. The strong excitation depende nce of the polarization anisotropy and energy of excitonic luminescenc e from the quantum wires was found to be consistent with a band-fillin g model that is based on a k . p and two-dimensional quantum confineme nt calculation.