Coherent subterahertz radiation from femtosecond infrared filaments in air

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 us...

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Published in:Optics letters 2002-11, Vol.27 (21), p.1944-1946
Main Authors: Tzortzakis, S, Méchain, G, Patalano, G, André, Y-B, Prade, B, Franco, M, Mysyrowicz, A, Munier, J-M, Gheudin, M, Beaudin, G, Encrenaz, P
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Physics
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cited_by cdi_FETCH-LOGICAL-c388t-6f7f7a727b8593670f54d55056e897dec6f259b555619a94e769df89c54e0c393
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container_end_page 1946
container_issue 21
container_start_page 1944
container_title Optics letters
container_volume 27
creator Tzortzakis, S
Méchain, G
Patalano, G
André, Y-B
Prade, B
Franco, M
Mysyrowicz, A
Munier, J-M
Gheudin, M
Beaudin, G
Encrenaz, P
description 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.
doi_str_mv 10.1364/ol.27.001944
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subjects Optics
Physics
title Coherent subterahertz radiation from femtosecond infrared filaments in air
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