Terahertz and mid-infrared radiation from femtosecond filaments in gases

O. G. Kosareva, N. A. Panov, V. A. Andreeva, D. E. Shipilo, A. B. Savelyev, A. P. Shkurinov, V. P. Kandidov, V. A. Makarov

Research output: Chapter in Book/Report/Conference proceedingChapter


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 languageEnglish (US)
Title of host publicationSpringer Series in Chemical Physics
PublisherSpringer New York LLC
Number of pages9
StatePublished - 2017

Publication series

NameSpringer Series in Chemical Physics
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.


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