A Single Free-falling Droplet Of Liquid Metal As A Source Of Directional Terahertz Radiation With Dynamic Gain ControlPoster (INST-P2)
Wed, 11 Nov 2020 01:15am to 03:00am
We show that an individual droplet of liquid metal can be a source of coherent terahertz (THz) radiation, when it is excited by two femtosecond laser pulses of the same frequency. We describe the experimental results with the model of dynamic gain control, which considers the interaction of both laser pulses with the droplet and explains the THz generation process taking into account the dynamics of electrons and ions after photo-ionization of the metal droplet. The spatial distribution of THz radiation has a forward- directed contribution, whose polarization properties are well described by a nonlinear susceptibility of the second order.
Authors: Shkurinov, Alexander; Makarov, Vladimir; Solyankin, Peter; Sinko, Anton; Coutaz, Jean-Louis
Faculty of Physics & International Laser Center, Lomonosov Moscow State University, Institute on Laser and Information Technologies - Branch of the Federal Scientific Research Centre, Lomonosov Moscow State Univesrity, Universite Savoie Mont-Blanc