Harald Künzel

Large area photoconductive terahertz emitter for 1.55 μm excitation based on an InGaAs heterostructure

Harald Schneider, Bernd Sartorius, Manfred Helm, 2013, Nanotechnology.

Passively mode-locked Tm,Ho:YAG laser at 2 microm based on saturable absorption of intersubband transitions in quantum wells.

Thomas Dekorsy, Klaus Biermann, Manfred Helm, 2010, Optics express.