
1.Science Program, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
2.P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russia
3.Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), P.O. Box 1527, Heraklion GR-71110, Greece
4.Department of Materials Science and Technology, University of Crete, Heraklion GR-71003, Greece
Vladimir Yu Fedorov (v.y.fedorov@gmail.com)
Stelios Tzortzakis (stzortz@iesl.forth.gr)
Published:2020,
Published Online:12 November 2020,
Received:13 May 2020,
Revised:11 October 2020,
Accepted:19 October 2020
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Fedorov, V. Y. & Tzortzakis, S. Powerful terahertz waves from long-wavelength infrared laser filaments. Light: Science & Applications, 9, 1713-1728 (2020).
Fedorov, V. Y. & Tzortzakis, S. Powerful terahertz waves from long-wavelength infrared laser filaments. Light: Science & Applications, 9, 1713-1728 (2020). DOI: 10.1038/s41377-020-00423-3.
Strong terahertz (THz) electric and magnetic transients open up new horizons in science and applications. We review the most promising way of achieving sub-cycle THz pulses with extreme field strengths. During the nonlinear propagation of two-color mid-infrared and far-infrared ultrashort laser pulses
long
and thick plasma strings are produced
where strong photocurrents result in intense THz transients. The corresponding THz electric and magnetic field strengths can potentially reach the gigavolt per centimeter and kilotesla levels
respectively. The intensities of these THz fields enable extreme nonlinear optics and relativistic physics. We offer a comprehensive review
starting from the microscopic physical processes of light-matter interactions with mid-infrared and far-infrared ultrashort laser pulses
the theoretical and numerical advances in the nonlinear propagation of these laser fields
and the most important experimental demonstrations to date.
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