Phys. Rev. A 81, 033403 (2010) [8 pages]

Dynamics of strong-field laser-induced microplasma formation in noble gases

Abstract

References

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D. A. Romanov^1,2, R. Compton^1,3, A. Filin^1,3, and R. J. Levis^1,3
¹Center for Advanced Photonics Research, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122, USA
²Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA
³Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA

Received 11 November 2009; published 4 March 2010

The ultrafast dynamics of microplasmas generated by femtosecond laser pulses in noble gases has been investigated using four-wave mixing (FWM). The time dependence of the FWM signal is observed to reach higher intensity levels faster for Xe, with progressively lower scattering intensity and longer time dynamics for the noble gas series Xe, Kr, Ar, Ne, and He. The temporal dynamics is interpreted in terms of a tunnel ionization and impact cooling mechanism. A formalism to interpret the observed phenomena is presented here with comparison to the measured laser intensity and gas pressure trends.

URL:

http://link.aps.org/doi/10.1103/PhysRevA.81.033403

DOI:

10.1103/PhysRevA.81.033403

PACS:

32.80.Rm, 42.65.Dr, 52.25.Os

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Phys. Rev. A 81, 033403 (2010) [8 pages]

Dynamics of strong-field laser-induced microplasma formation in noble gases