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• (author = "Liu, Yi" AND subject = "filamentation")
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author = "Liu, Yi" > : "filamentation" (x)
1

Found 6 documents, displaying page 1 of 1

Terahertz Radiation Source in Air Based on Bifilamentation of Femtosecond Laser Pulses

Author(s) : Liu, Yi , Houard, Aurélien , Akturk, Selcuk , Mysyrowicz, André , Tikhonchuk, Vladimir
Description : A new terahertz (THz) source in air based on the bifilamentation of femtosecond laser pulses is reported. This THz radiation is 1 order of magnitude more intense than the transition-Cherenkov THz emission from femtosecond laser filaments reported recently and shows different angular and polarization...
Repository : HAL - Hyper Article on Line
Language(s) : English

Maker fringes in the Terahertz radiation produced by a 2-color laser field in air

Author(s) : Liu, Yi , Houard, Aurélien , Durand, Magali , Prade, Bernard , Mysyrowicz, André
Description : The terahertz radiation produced by a 2-color femtosecond laser scheme strongly saturates and develops an oscillatory behavior with increasing power of the driving femtosecond laser pulses. This is explained by the formation of a plasma channel due to filamentation. Due to dispersion inside the fila...
Repository : HAL - Hyper Article on Line
Language(s) : English

Fine control of terahertz radiation from filamentation by molecular lensing in air

Author(s) : Durand, Magali , Liu, Yi , Houard, Aurélien , Mysyrowicz, André
Description : We demonstrate a method to control remotely the terahertz (THz) source in air based on the bifilamentation of femtosecond laser pulses. By fine tuning the time delay between the two pulses, a significant modulation of the THz intensity from bifilamentation is observed. The phenomenon is attributed t...
Repository : HAL - Hyper Article on Line
Language(s) : English

Strong Enhancement of Terahertz Radiation from Laser Filaments in Air by a Static Electric Field

Author(s) : Houard, Aurélien , Liu, Yi , Prade, Bernard , Tikhonchuk, Vladimir , Mysyrowicz, André
Description : We observe a 3 order of magnitude enhancement of the terahertz energy radiated by a femtosecond pulse undergoing filamentation in air in the presence of a static electric field. Measurements of terahertz pulse duration, spectrum, polarization, and radiation pattern elucidate the physical processes r...
Repository : HAL - Hyper Article on Line
Language(s) : English

Energy Exchange between Femtosecond Laser Filaments in Air

Author(s) : Liu, Yi , Durand, Magali , Chen, Shihua , Houard, Aurélien , Prade, Bernard , Forestier, Benjamin , Mysyrowicz, André
Description : We report on the energy exchange between femtosecond laser filaments in air. A traveling plasma grating formed at the intersection of the filaments is proposed to explain the energy transfer. In this moving plasma grating mediated mechanism the laser energy transfers from the lower frequency pulse t...
Repository : HAL - Hyper Article on Line
Language(s) : English

Revival of femtosecond laser plasma filaments in air by a nanosecond laser

Author(s) : Zhou, Bing , Akturk, Selcuk , Prade, Bernard , André, Yves-Bernard , Houard, Aurélien , Liu, Yi , Franco, Michel , D'Amico, Ciro
Description : Short lived plasma channels generated through filamentation of femtosecond laser pulses in air can be revived after several milliseconds by a delayed nanosecond pulse. Electrons initially ionized from oxygen molecules and subsequently captured by neutral oxygen molecules provide the long-lived reser...
Repository : HAL - Hyper Article on Line
Language(s) : English
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Found 6 documents, displaying page 1 of 1