Coherent subterahertz radiation from femtosecond infrared filaments in air

Stylianos Tzortzakis, G. Méchain, G. Patalano, Y. B. André, B. Prade, M. Franco, A. Mysyrowicz, J. M. Munier, M. Gheudin, G. Beaudin, P. Encrenaz

Research output: Contribution to journalArticle

160 Citations (Scopus)


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 ± 1 GHz. We describe the characteristics of this emission and show evidence of constructive interference between two separate strings.

Original languageEnglish
Pages (from-to)1944-1946
Number of pages3
JournalOptics Letters
Issue number21
Publication statusPublished - 1 Nov 2002
Externally publishedYes


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Tzortzakis, S., Méchain, G., Patalano, G., André, Y. B., Prade, B., Franco, M., Mysyrowicz, A., Munier, J. M., Gheudin, M., Beaudin, G., & Encrenaz, P. (2002). Coherent subterahertz radiation from femtosecond infrared filaments in air. Optics Letters, 27(21), 1944-1946.