Orientation dependence of optical gain in zincblende-GaN strained-quantum-well lasers

Optical gains in zincblende-GaN strained-quantum-well (QW) lasers are analyzed theoretically for various crystal orientations. Valence subbands are calculated based on the 6/spl times/6 Luttinger-Kohn model. It is found that the gains in zincblende-GaN strained-QW lasers with [110] orientation are much higher than those in wurtzite-GaN lasers with (0001) orientation.