Expansion velocities of 0.5 ps KrF excimer laser induced plasma by Doppler-shift analysis of pump and probe measurements

Z. Tóth, B. Hopp, J. Klebniczki, N. Kresz, Z. Bor, D. Anglos, C. Kalpouzos, C. Fotakis

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

High gradient laser plasma is formed by focused KrF laser pulses (248.3 nm, 450 fs, 10 13 W/cm 2) on liquids (water, styrene) and solids (silicon, aluminum, and polyimide). The hydrodynamic expansion of the plasma was studied by measuring the blue Doppler-shift of reflected probe pulses which was produced by a delayed dye laser (496.6 nm, 450fs). The Doppler-shift corresponds to the velocity of the reflecting surface of the plasma which is defined by the critical electron density. Expansion is investigated as a function of delay time and laser intensity. The reflecting surface of the plasma accelerates over 1-2ps after the onset of the ablating laser pulse. With increasing intensity up to 2 × 10 13 W/cm 2 the maximum average velocities are monotonously increasing up to ∼ 1-2 × 10 5m/s.

Original languageEnglish
Pages (from-to)1287-1290
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume79
Issue number4-6
Publication statusPublished - Sep 2004

Fingerprint

Doppler effect
Excimer lasers
excimer lasers
Pumps
pumps
Plasmas
Laser pulses
expansion
probes
shift
pulses
lasers
polyimides
laser plasmas
styrenes
dye lasers
Styrene
Dye lasers
Lasers
Silicon

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Expansion velocities of 0.5 ps KrF excimer laser induced plasma by Doppler-shift analysis of pump and probe measurements. / Tóth, Z.; Hopp, B.; Klebniczki, J.; Kresz, N.; Bor, Z.; Anglos, D.; Kalpouzos, C.; Fotakis, C.

In: Applied Physics A: Materials Science and Processing, Vol. 79, No. 4-6, 09.2004, p. 1287-1290.

Research output: Contribution to journalArticle

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AU - Hopp, B.

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AU - Kresz, N.

AU - Bor, Z.

AU - Anglos, D.

AU - Kalpouzos, C.

AU - Fotakis, C.

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