Resonant tunnelling of Wannier-Stark states

摘要

An effective method of calculating Stark resonances is deduced from a scattering theory for Stark systems. The method is applied to the problem of a Bloch particle in a constant external field. When the field strength is varied over a wide range, resonant tunnelling can be observed. The resonance widths as a function of the field strength can be accurately described by a few-states model.