Stark Control of Electrons Across Interfaces

We introduce a laser control scenario to transiently transform an insulating heterojunction into a conducting one on a femtosecond timescale. The scenario is based on opening Landau-Zener quantum tunneling channels for electron transfer between two adjacent semiconductors via Stark shifts induced by non-resonant lasers of intermediate intensity (non-perturbative but non-ionizing). Through quantum dynamics simulations we demonstrate the robustness of the approach and its utility for controlling electron dynamics at interfaces.

A. J. Garzon-Ramirez and I. Franco, Phys. Rev. B, 98, 121305(R) (2018)