F. Brüggemann

Observation of Bloch oscillations in a semiconductor superlattice

Karl Leo, Klaus Köhler, K. Köhler, 1992 .

Type-I and type-II Wannier-Stark effect in InGaAs/InGaAs superlattices

A. Kohl, K. Leo, F. Brüggemann, 1993 .

Detection of Bloch oscillations in a semiconductor superlattice by time-resolved terahertz spectroscopy and degenerate four-wave mixing

Karl Leo, Hartmut G. Roskos, Heinrich Kurz, 1994 .