Doppler shift of femtosecond laser pulses from solid density plasmas

Research output: Contribution to journalArticle

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Abstract

Doppler-shift of short UV pulses (248 nm, 700 fs) reflected from aluminum, polystyrene and gold targets were measured at focused intensities up to 5 × 1015 W/cm2. In spite of the fact that the Doppler-shifts are expected to be dependent on the atomic weight of the target material, experimentally similar shifts are found for all targets. A possible explanation is provided by the well known dependence of the Doppler shift on the plasma temperature, if different absorption coefficients are assumed for the different targets. This coefficient shows good agreement with that one deduced from a theory based on collisional absorption in the case of aluminum, but in the case of the other targets, however, the experimentally observed Doppler-shift suggests smaller absorption for lighter and larger absorption for heavier target materials.

Original languageEnglish
Pages (from-to)635-638
Number of pages4
JournalApplied Physics B: Lasers and Optics
Volume78
Issue number5
DOIs
Publication statusPublished - Mar 2004

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plasma density
shift
pulses
lasers
aluminum
atomic weights
plasma temperature
polystyrene
absorptivity
gold
coefficients

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this

Doppler shift of femtosecond laser pulses from solid density plasmas. / Veres, G.; Kocsis, G.; Rácz, E.; Szatmári, S.

In: Applied Physics B: Lasers and Optics, Vol. 78, No. 5, 03.2004, p. 635-638.

Research output: Contribution to journalArticle

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