Description:
This graph shows the calculated optical density of the states of a superlattice as function of the photon energy and the electric field. At small electric field values, Wannier-Stark ladders emerge. At large electric field values, Zener tunneling sets in, destroying the Wannier-Stark ladders.
Submitted by Dr. Stephan Glutsch, a researcher at Friedrich Schiller University Jena, Institute of Solid State Theory and Theoretical Optics, Germany.