High-intensity THz pulse generation by TW laser radiation in ionized gas and nonlinear crystals. (May 2020)

• Record Type: Journal Article
• Authors: Nazarov, M M; Mitrofanov, A V; Solyankin, P M; Margushev, Z Ch; Chashin, M V; Shkurinov, A P; Sidorov-Biryukov, D A; Panchenko, V Ya
• Is Part Of: Journal of physics. Volume 1556(2020)
• Publication Date: 2020-05
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1556/1/012008
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Intense electromagnetic fields can be obtained now in THz frequency range. THz pulses with electric field intensity above 1 MV/cm are now requested for strong-field applications like particle acceleration, short electron bunches measurements, controlling the state of the matter. The advantage of a THz pulse in comparison with the visible frequency range is the almost non-oscillating field that interacts with charged particles more efficiently. The advantage over a direct field is the ability to remotely focus this radiation in space and in time. Except for the huge free-electron lasers facilities, the only way to get THz pulses of MV/cm intensity is the conversion of high-power femtosecond laser pulses. We compare two ways of generating intense THz pulses using the radiation of TW and GW laser systems operating at 800 nm. They are two-color filamentation in gas and optical rectification in nonlinear crystals. The prospects for scaling of THz generation methods for a petawatt laser are discussed.