Coherent subterahertz radiation from femtosecond infrared filaments in air. Academic Article uri icon


  • 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.

altmetric score

  • 3

author list (cited authors)

  • Tzortzakis, S., Méchain, G., Patalano, G., André, Y., Prade, B., Franco, M., ... Encrenaz, P.

citation count

  • 141

publication date

  • November 2002