Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 19: Atomic clusters I
A 19.5: Vortrag
Donnerstag, 17. März 2011, 11:45–12:00, BAR 205
Ionization dynamics of doped helium nanodroplets in intense few-cycle IR laser fields — •Siva Rama Krishnan1, Marcel Mudrich2, Lutz Fechner2, Vandana Sharma1, Manuel Kremer1, Bettina Fischer1, Nicolas Camus1, Jagannath Jha3, Krishnamurthy Manchikanti3, Robert Moshammer1, Frank Stienkemeier2, and Joachim Ullrich1 — 1Max Planck Institut für Kernphysik, Saupferchekweg 1, 69117 Heidelberg, Germany — 2Physikalisches Institut, Universität Freiburg Hermann-Herder-Str. 3, 79104 Freiburg, Germany — 3Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400005, India
The ionization dynamics of two-component rare-gas clusters in intense laser fields has evoked recent interest due to the markedly different behaviour when compared to pristine clusters both in the intense IR [1,2] and intense VUV or soft X-ray domains [3,4]. We present studies on the ionization dynamics of helium nanodroplets (104 He atoms/droplet) doped with 1-100 atoms of other rare-gas dopants (Xe, Kr or Ar) which form embedded clusters at the center of the helium droplet. Intense few-cycle laser pulses (6 fs) with a central wavelength of 790nm and peak intensities in the range of 1014−15 W.cm−2 were used to ionize these droplets. Our studies reveal that the resulting ionization dynamics is very sensitive to the number of dopants in the droplets. [1]J. Jha and M. Krishnamurthy, J. Phys. B 41, 041002 (2008) [2]A. Mikaberidze et al., Phys. Rev. Lett. 102, 128102 (2009) [3]H. Thomas et al.,J. Phys. B. 42, 134018 (2009) [4]C. Gnodtke et al., Phys. Rev. A 79, 041201 (2009).