Light-induced atomic desorption in cells with different PDMS coatings

18th International Summer School on Vacuum, Electron and Ion Technologies

Tsvetkov, S.^1 ; Gateva, S.^1 ; Taslakov, M.^1 ; Mariotti, E.^2 ; Cartaleva, S.^1

Acad. E. Djakov Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria^1

Physics Department, University of Siena, CNISM, via Roma 56, 53100 Siena, Italy^2

关键词: Atomic magnetometers;    Experimental investigations;    Light-induced atomic desorptions;    Magnetooptical traps;    Non-thermal process;    Optical characterization;    Surface interactions;    Transmission spectrums;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/514/1/012030/pdf
DOI  :  10.1088/1742-6596/514/1/012030

来源: IOP

【 摘 要 】

Light-induced atomic desorption (LIAD) is a non-thermal process in which atoms adsorbed at a surface are released under illumination. It is applied mostly to implementing optical dispensers in the cases when high atomic density at low temperature is needed-for example, for loading atomic devices as atomic magnetometers, atomic clocks, magneto-optical traps and their miniaturization. However, as the desorption depends on the atom-surface interaction, it can also be used for optical characterization and manipulation of alkali metal nanoparticles. The paper describes an experimental investigation of the shape of the transmission spectra and their dependence on the illuminating blue-light power in PDMS coated cells prepared with two different concentrations of PDMS in ether. A comparison is conducted with the LIAD effect in SC-77 coated and in uncoated cells. All measurements are performed on the Rb D2 line in vacuum. The potential is discussed for application of these dependences to analyzing the quality of the coating surface and its optimization.