Valence-band mixing effects on hole oscillations in coupled quantum wells

Valence-band mixing effects on the dynamics of the heavy- and light-hole oscillations in coupled quantum wells are described by a numerical implementation using the time-dependent Schrödinger equation with the Luttinger Hamiltonian. With a nonzero in-plane wave vector (${\mathit{k}}_{\mathrm{\parallel }}$≠0), mixing tunneling (between heavy- and light-hole states) and spatial tunneling (from one well to the other) occur at the same time. This time-dependent analysis clearly resolves these two tunneling mechanisms and shows several effects which have not been addressed by previous time-independent analysis.