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Latin America Optics and Photonics Conference

Light-induced Atomic Desorption of Rb Atoms from Nano-structured Alumina

H. Failache, S. Villalba, A. Lezama

Published Jan 1, 2010• 0 citations
Publisher

Abstract

We present an experimental study of light-induced atomic desorption (LIAD) of Rb atoms from porous alumina. The well defined geometry of the nano-structured alumina allows a description of the LIAD process at the microscopic level.
DOI
10.1364/laop.2010.wg3

Related papers

Light-induced atomic desorption and diffusion of Rb from porous alumina

S. Villalba, H. Failache, A. Lezama

We present a study of light-induced atom desorption (LIAD) of an alkali-metal atom (Rb) in porous alumina. We observe the variation due to LIAD of the rubidium density in a vapor cell as a function of illumination time, intensity, and wavelength. The simple and regular structure of the alumina pores allows a description of the atomic diffusion in the porous medium in which the diffusion constant only depends on the known pore geometry and the atomic sticking time to the pore wall. A simple one-dimensional theoretical model is presented which reproduces the essential features of the observed signals. Fitting of the model to the experimental data gives access to the diffusion constant and consequently the atom-wall sticking time and its dependence on light intensity and wavelength. The nonmonotonic dependence of the LIAD yield on the illumination light frequency is indicative of the existence of Rb clusters in the porous medium.

arXiv:0910.5171•Physical Review A•Mar 15, 2010•25 citations

Reply to Comment on Light-induced atomic desorption and diffusion of Rb from porous alumina

S. Villalba, H. Failache, A. Lezama

We argue that the model used in our paper [Phys. Rev. A 81, 032901 (2010)] for the analysis of the experimental study of light-induced atomic desorption in porous alumina is the simplest consistent approach to a previously unexplored physical system.

Physical Review A•Nov 29, 2010•1 citation

Comment on “Light-induced atomic desorption and diffusion of Rb from porous alumina”

Krzysztof Rębilas

In a recent article [Phys. Rev. A 81, 032901 (2010)] a theory of light-induced atomic desorption for Rb in porous alumina is proposed. We point out that both the main assumption of this theory (the diffusion inside the pores treated as a random walk with the adsorption to the inner surface of the pores at any step) and several further hypotheses supporting the theoretical model require a revision.

Physical Review A•Nov 29, 2010•1 citation

Publisher’s Note: Comment on “Light-induced atomic desorption and diffusion of Rb from porous alumina” [Phys. Rev. A82, 056901 (2010)]

Krzysztof Rębilas

Physical Review A•Jan 9, 2012•0 citations

Light-induced atomic desorption and related phenomena

A. Burchianti, Andrea Bogi, C. Marinelli +2 more

We review some recent studies on light-induced atomic desorption (LIAD) from dielectric surfaces. Alkali-metal atoms adsorbed either on organic films or on porous glass are released into the vapor phase under illumination. The measurements were performed in Pyrex resonance cells either coated with siloxane films or containing a porous glass sample. In both cases, the experimental results show that LIAD can be used to produce atomic densities suitable for most atomic physics experiments. Moreover, we find that photoinduced effects, correlated with LIAD, produce reversible formation and evaporation of alkali-metal clusters in porous glass. These processes depend on the light frequency, making the porous glass transmittance controllable by light.

Physica Scripta•Jul 1, 2009•14 citations

Light-induced atomic desorption from PDMS films and porous glass: application and fundamental issues

A. Burchianti, C. Marinelli, Andrea Bogi +5 more

Light-induced desorption and diffusion of alkali atoms embedded in dielectric substrates are experimentally and theoretically investigated. The goal is to realize atomic dispensers fully controlled by light, to study the atom-dielectric interaction and to make spectroscopy of atoms confined in micro-nano structures. Very interesting results have been obtained with Rb and Cs in PDMS films and porous glasses.

Journal of Physics Conference Series•Jan 1, 2005•4 citations
We present a study of light-induced atom desorption (LIAD) of an alkali-metal atom (Rb) in porous alumina. We observe the variation due to LIAD of the rubidium density in a vapor cell as a function of illumination time, intensity, and wavelength. The simple and regular structure of the alumina pores allows a description of the atomic diffusion in the porous medium in which the diffusion constant only depends on the known pore geometry and the atomic sticking time to the pore wall. A simple one-dimensional theoretical model is presented which reproduces the essential features of the observed signals. Fitting of the model to the experimental data gives access to the diffusion constant and consequently the atom-wall sticking time and its dependence on light intensity and wavelength. The nonmonotonic dependence of the LIAD yield on the illumination light frequency is indicative of the existence of Rb clusters in the porous medium.
We review some recent studies on light-induced atomic desorption (LIAD) from dielectric surfaces. Alkali-metal atoms adsorbed either on organic films or on porous glass are released into the vapor phase under illumination. The measurements were performed in Pyrex resonance cells either coated with siloxane films or containing a porous glass sample. In both cases, the experimental results show that LIAD can be used to produce atomic densities suitable for most atomic physics experiments. Moreover, we find that photoinduced effects, correlated with LIAD, produce reversible formation and evaporation of alkali-metal clusters in porous glass. These processes depend on the light frequency, making the porous glass transmittance controllable by light.