THEORETICAL GAIN OF [HHK]-ORIENTED QUANTUM-WIRE LASERS

Optical gain in quantum wire (QWI) lasers are theoretically investigat ed as functions of wire crystallographic direction taking valence band anisotropy into account. Calculations for GaAs cylindrical QWI with i nfinite barriers are performed by using the 4X4 Luttinger-Kohn Hamilto nian. Considering the structural optimization of QWI lasers from the v iewpoint of crystallographic direction, we find that a [111]-QWI laser s is the most suitable low-threshold laser and that a [1,-1,0]-QWI las er on a (110) substrate is the most suitable polarization-stabilized v ertical-cavity surface-emitting laser. (C) 1996 American Institute of Physics.