Rosam, B.B.RosamLöser, F.F.LöserLyssenko, V.V.LyssenkoLeo, K.K.LeoGlutsch, S.S.GlutschBechstedt, F.F.BechstedtKöhler, KlausKlausKöhler2022-03-032022-03-031999https://publica.fraunhofer.de/handle/publica/19592110.1016/S0921-4526(99)00266-5We investigate the electronic structure in strongly coupled superlattices over a wide field range. It is shown that the Wannier-Stark localization is followed by a field-induced delocalization which is due to a strong Zener coupling to continuum states. The associated Zener breakdown is quantitatively shown in a detailed analysis of the absorption. A comprehensive theoretical model excellently describes the experimental results. Zener tunneling times are directly addressed with the help of time-resolved experiments.enIII-V semiconductorIII-V HalbleitersuperlatticeÜbergitteroptical measurementoptische Messung621667531journal article