Light-Matter Interaction and Lasing in Semiconductor Nanowires: A combined FDTD and Semiconductor Bloch Equation Approach

摘要

We present a time-domain model for the simulation of light-matter interactionin semiconductors in arbitrary geometries and across a wide range of excitationconditions. The electromagnetic field is treated classically using thefinite-difference time-domain method. The polarization and occupation numbersof the semiconductor material are described using the semiconductor Blochequations including many-body effects in the screened Hartree-Fockapproximation. Spontaneous emission noise is introduced using stochasticdriving terms. As an application of the model, we present simulations of thedynamics of a nanowire laser including optical pumping, seeding by spontaneousemission and the selection of lasing modes.