T. Ohtoshi et al., DEPENDENCE OF LINEWIDTH ENHANCEMENT FACTOR ON CRYSTAL ORIENTATION IN STRAINED-QUANTUM-WELL LASERS, IEEE photonics technology letters, 6(12), 1994, pp. 1424-1426
The linewidth enhancement factor a in strained quantum well (QW) laser
s is estimated theoretically for various crystallographic directions,
It is found that the a factor in a strained In0.7Ga0.3As-InP QW laser
on a (111) substrate is less than 1.4, much lower than for conventiona
l strained QW lasers on (001) substrates.