Three-half harmonic-generation in laser-plasma interaction – evidence for plasmon propagation

Year: 1991

Authors: Giulietti D., Biancalana V., Batani D., Giulietti A., Gizzi L.A., Nocera L., Schifano E.

Autors Affiliation: CNR, Ist Fis Atom & Molec, via Giardino 7, I-56127 Pisa, Italy;
Univ Pisa, Dipartimento Fis, I-56100 Pisa, Italy

Abstract: Side emitted 3-omega/2 radiation was studied by interacting 1.064-mu-m laser light with plasmas obtained from exploding thin foils. Both focusing (f/8) and collecting (f/7) optics were designed in order to reduce the instrumental bandwidth of the 3-omega/2 spectrum. Time-resolved spectra and time-resolved images were obtained and analysed. All the observed spectral features, including the substantial lack of a <> component, the amount of red shift and bandwidth, are consistent with the Karttunen theory of half-integer harmonics generated in plasmas. This theory takes into account the propagation of omega/2 plasmons produced by <> and their coupling with laser light.

Journal/Review: NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS

Volume: 13 (7)      Pages from: 845  to: 858

KeyWords: time-resolved observations; 2-plasmon decay; emission; light; instability
DOI: 10.1007/BF02457172

Citations: 16
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