Allgemeines Physikalisches Kolloquium - SS 2014
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48149 Münster, Wilhelm-Klemm-Straße 10, IG 1, HS 2 |
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Donnerstag, 24.04.2014, 16 Uhr c.t. |
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Kolloquiums-Kaffe: ab 15:45 Uhr vor dem Hörsaal |
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Faster than an oscillation cycle of light
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Prof. Dr. Rupert Huber, Institut für Experimentelle und Angewandte Physik, Universität Regensburg
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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.
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Einladender: Prof. Dr. Rudolf Bratschitsch |
Im Auftrag der Hochschullehrer des Fachbereichs Physik |
Prof. Dr. N.A. Stolwijk |