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Coherent subterahertz radiation from femtosecond infrared filaments in air

Authors
  • Tzortzakis, Stellios
  • Méchain, Grégoire
  • Patalano, G.
  • André, Yves-Bernard
  • Prade, Bernard
  • Franco, Michel
  • Mysyrowicz, André
  • Munier, J.-M.
  • Gheudin, M.
  • Beaudin, G.
  • Encrenaz, Pierre
Publication Date
Nov 01, 2002
Identifiers
DOI: 10.1364/OL.27.001944
OAI: oai:HAL:hal-00463674v1
Source
Hal-Diderot
Keywords
Language
English
License
Unknown
External links

Abstract

We report on what is believed to be the first observation of coherent subterahertz (sub-THz) emission from a 1-m string in the atmosphere. The sub-THz pulse emitted by the filamentary structure from an intense IR femtosecond laser pulse is detected perpendicularly to the laser propagation axis by use of two heterodyne detectors at 94±1 and 118±1GHz . We describe the characteristics of this emission and show evidence of constructive interference between two separate strings.

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