Efficient atomization of cesium metal in solid helium by low energy (10 μJ) femtosecond pulses
Laboratoire Kastler Brossel, ENS, UPMC-Paris 6, CNRS, 24 rue Lhomond, 75005 Paris, France
Corresponding author: a email@example.com
Revised: 11 June 2009
Published online: 15 August 2009
Metal atoms in solid and liquid helium-4 have attracted some interest either as a way to keep the atoms in a weakly perturbing matrix, or using them as a probe for the helium host medium. Laser sputtering with nanosecond pulsed lasers is the most often used method for atom production, resulting however in a substantial perturbation of the matrix. We show that a much weaker perturbation can be obtained by using femtosecond laser pulses with energy as low as 10 μJ. As an unexpected benefit, the atomic density produced is much higher.
PACS: 67.80.B- – Solid 4He / 61.72.S- – Impurities in crystals / 06.60.Jn – High-speed techniques
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009