Dynamics of laser-induced cesium atom desorption from porous glass

The dynamics of short pulsed infrared laser-induced desorption of Cesium atoms from porous silica samples has been investigated. We find most probable kinetic energies of 69 ± 6 meV for desorption laser fluences between 60 and 190 mJ/cm 2, significantly higher compared to those obtained for Cs desor...

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Published inChemical physics letters Vol. 420; no. 4; pp. 291 - 295
Main Authors Kawalec, T., Kasprowicz, M.J., Jozefowski, L., Burchianti, A., Marinelli, C., Rubahn, H.-G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 21.03.2006
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Summary:The dynamics of short pulsed infrared laser-induced desorption of Cesium atoms from porous silica samples has been investigated. We find most probable kinetic energies of 69 ± 6 meV for desorption laser fluences between 60 and 190 mJ/cm 2, significantly higher compared to those obtained for Cs desorption from plain glass, 40 ± 2 meV, but lower compared to those observed for Na and Rb desorption from polymeric surfaces, 200 meV. This is explained qualitatively by scattering of the desorbing atoms with the silica nanochannels, thus suggesting different pulsed laser photodesorption processes for atoms embedded in hard porous dielectrics as compared to polymeric thin films.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2005.12.091