High-field High-Repetition-rate sources for the Coherent THz Control of Matter

High-field High-Repetition-rate sources for the Coherent THz Control of Matter

Green, B.; Kovalev, S.; Asgekar, V.; Geloni, G.; Lehnert, U.; Golz, T.; Kuntzsch, M.; Bauer, C.; Hauser, J.; Voigtlaender, J.; Wustmann, B.; Koesterke, I.; Schwarz, M.; Freitag, M.; Arnold, A.; Teichert, J.; Justus, M.; Seidel, W.; Ilgner, C.; Awari, N.; Nicoletti, D.; Kaiser, S.; Laplace, Y.; Rajasekaran, S.; Zhang, L.; Winnerl, S.; Schneider, H.; Schay, G.; Lorenzc, I.; Rauscher, A.; Radu, I.; Mährlein, S.; Kampfrath, T.; Wall, S.; Heberle, J.; Malnasi, A.; Cavalleri, A.; Steiger, A.; Müller, A. S.; Helm, M.; Schramm, U.; Cowan, T.; Michel, P.; Fisher, A. S.; Stojanovic, N.; Gensch, M.

Abstract

Ultra-short flashes of THz light with low quantum energies of a few meV, but strong electric or magnetic field transients have recently been employed to prepare various fascinating nonequilibrium states in matter. Here we present a new class of sources based on superradiant enhancement of radiation from relativistic ultra-short electron bunches in a compact electron accelerator that we believe will revolutionize experiments in this field. Our prototype source generates high-field THz pulses at unprecedented repetition rates up to the MHz regime. We demonstrate parameters that already exceed state of the art laser-based sources by more than 2 orders of magnitude. The parameters are scalable and once operational at their design parameters this type of sources will provide 1 MV/cm electric fields and magnetic fields in the few 100 mT regime at repetition rates of few 100 kHz.

Keywords: superradiance; coherent control; THz; High-field

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Permalink: https://www.hzdr.de/publications/Publ-21590