Allgemeines Physikalisches Kolloquium - SS 2014

Ort:	48149 Münster, Wilhelm-Klemm-Straße 10, IG 1, HS 2
Zeit:	Donnerstag, 24.04.2014, 16 Uhr c.t.
	Kolloquiums-Kaffe: ab 15:45 Uhr vor dem Hörsaal

Faster than an oscillation cycle of light

Prof. Dr. Rupert Huber, Institut für Experimentelle und Angewandte Physik, Universität Regensburg

The physical properties of condensed matter are often caused by ultrafast phenomena involving low-energy elementary excitations. Examples range from lattice vibrations, spin precession, and plasma waves to superconducting energy gaps. Few-cycle pulses in the terahertz (1 THz = 1012 Hz) to mid-infrared spectral domain and field-sensitive detectors have been developed in recent years to monitor these excitations directly with femtosecond resolution (1 fs = 10-15 s). In addition, we recently demonstrated record high electric field amplitudes of more than 10 GV/m in the multi-terahertz regime. These pulses allow us to accelerate electrons and control spins, on time scales shorter than a single oscillation cycle of infrared light. Our experiments challenge latest quantum theories and spark hope for superfast electronics and magnetic storage devices at optical clock rates.

Einladender: Prof. Dr. Rudolf Bratschitsch

Im Auftrag der Hochschullehrer des Fachbereichs Physik

Prof. Dr. N.A. Stolwijk