Light-induced atomic desorption from porous silica

Year: 2004

Authors: Burchianti A., Marinelli C., Bogi A., Brewer J., Rubahn K.,

Rubahn H.-G., Della Valle F., Mariotti E., Biancalana V.,
Veronesi S., Moi L.

Autors Affiliation: INFM UdR di Siena, Dipartimento di Fisica, Universitą di Siena
via Roma 56, I-53100 Siena, Italy
Syddansk Universitet, Fysisk Institut – Campusvej 55, DK-5230 Odense M, Denmark
Dipartimento di Fisica, Universitą di Trieste – via A. Valerio 2, I-34127 Trieste, Italy

Abstract: Huge light-induced rubidium atom desorption has been observed from porous silica samples placed inside Pyrex cells kept at room temperature. The desorption rate and the maximum vapour density change have been measured as a function of the desorbing light intensity. Their values are comparable with those recently obtained in Pyrex cells coated with organic films. A linear dependence of the desorption rate and a square-root dependence of the maximum density increase on light intensity indicate that diffusion inside the glass pores is a key mechanism. The application of this effect to develop light-controlled atomic dispensers compatible with high vacuum environment is discussed.

Journal/Review: EUROPHYSICS LETTERS

Volume: 67 (6)      Pages from: 983  to: 989

KeyWords: Photodesorption; Nanostructured Materials; Film
DOI: 10.1209/epl/i2004-10141-6

ImpactFactor: 2.120
Citations: 41
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