Abstract
The phenomenon of ultrashort laser-pulse filamentation in transparent gases and liquids is represented by the localization of laser energy in a thin string of light called filament. This string is created under the joint action of radiation self-focusing and defocusing in the plasma, which is produced by the same propagating laser pulse that limits the self-focusing collapse. Ultrashort filamenting pulse emits continuum spanning from ultraviolet to terahertz range. The origin of low-frequency terahertz (THz) radiation (0-15 THz) originates from the ionization-induced photocurrent, while the higher-frequency THz radiation comes from the Kerr nonlinearity of neutral molecules.
Original language | English (US) |
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Title of host publication | Springer Series in Chemical Physics |
Publisher | Springer New York LLC |
Pages | 35-43 |
Number of pages | 9 |
DOIs | |
State | Published - 2017 |
Publication series
Name | Springer Series in Chemical Physics |
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Volume | 115 |
ISSN (Print) | 0172-6218 |
Bibliographical note
Funding Information:We thank Professor Kaoru Yamanouchi for sponsoring our trip to Japan and his excellent organization of the first STEP symposium. We thank RFBR (15-02-99630, 14-02-31379, 15-32-20966, 14-22-02021), the Council of RF President for Support of Young Scientists (MK-8562.2016.2), RF President grant for Leading Scientific Schools (NSh-9695.2016.2), and Basis Foundation.
Publisher Copyright:
© Springer International Publishing AG 2017.