Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 40: Focus: Terahertz radiation and magnetism

MA 40.1: Hauptvortrag

Donnerstag, 10. März 2016, 09:30–10:00, H32

Sub-cycle terahertz electronics and magnonics: control and nanoscopy — •Rupert Huber — Department of Physics, University of Regensburg, 93053 Regensburg, Germany

High-intensity terahertz (THz) sources have become a unique tool to explore condensed matter under atomically strong electric and magnetic biasing. We show that terahertz fields of up to 11 GV/m can accelerate electrons in bulk semiconductors to perform complete Bloch oscillation cycles within half an oscillation period of the drive field. The concomitant magnetic field component allows us to control spins in magnetically ordered solids. Intense THz pulses drive the spin degree of freedom into a massively nonlinear response regime. By combining scanning probe microscopy with phase-locked high-field THz waveforms and field-sensitive electro-optic sampling, we unite sub-cycle time resolution with nanometer and even atomic-scale spatial resolution. Our results shed fundamentally new light onto the structure and dynamics of the elementary building blocks of condensed matter and spark hope for electronics and magnetic storage at optical clock rates.