Frederik Walla

Nov 9, 2023 | link.aps.org | Fanqi Meng |Physikalisches Institut |J. W. Goethe-Universität |Frederik Walla

We investigate ultrafast harmonic generation (HG) in Si:B, driven by intense pump pulses with fields reaching ∼100kVcm−1 and a carrier frequency of 300 GHz, at 4 K and 300 K, both experimentally and theoretically. We report several findings concerning the nonlinear charge carrier dynamics in intense sub-THz fields: (i) Harmonics of order up to n=9 are observed at room temperature, while at low temperature we can resolve harmonics reaching at least n=11.