Inclusion of Bandstructure and Many-Body Effects in a Quantum Well Laser Simulator
1998
A self-consistent eight band k.p calculation, which takes into account strain and
includes Hartree, exchange, and correlation terms (determined from a local density
approximation) is incorporated into a QW laser simulator (MINILASE-II). The
computation is performed within the envelope function approximation for a superlattice,
in which all spatially varying terms of the k.p Hamiltonian, including the
exchange and correlation energies are expanded in plane waves. The k.p eigenvalue
equation, and Poisson's equation are solved iteratively until self-consistency is attained.
Results from the k.p calculation are exported to MINILASE-II via a density of states
and an energy dependent optical matrix element factor, renormalized by a Coulomb
enhancement factor to account for electron-hole attraction. Results are presented for
the gain spectrum and modulation response for a Ga0.8 In0.2 As/Al0.1 Ga0.9 As quantum
well laser with and without the inclusion of the Coulomb enhancement factor.
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