Abstract

Organometallic chemical vapor deposition (OMCVD) of quantum-well heterostructures on V-grooved substrates is useful for producing crescent-shaped quantum wires (QWRs) showing excellent luminescence efficiency.¹ Room-temperature operation with sub-mA threshold currents of QWR-lasers incorporating such vertically stacked wires has been demonstrated² However, it is often desirable to have dense, lateral arrays of QWRs spaced by less than the carrier diffusion length in order to allow efficient carrier thermalization into the lower-energy wires. We report on the luminescence properties of such QWR arrays. We observe photoluminescence (EL) spectra dominated by emission from the QWRs, which gives evidence for efficient carrier capture in the wires. The PL excitation spectra of the samples exhibit QWR subbands with electron heavy hole (e-hh) transition energies separated by 38 meV.

© 1992 Optical Society of America