Optical characterization of antirelaxation coatings for photonics applications

Year: 2016

Authors: Tsvetkov S., Gateva S., Nasyrov K., Gozzini S., Mariotti E., Cartaleva S.

Autors Affiliation: Institute of Electronics, Bulgarian Academy of Sciences,72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria
Institute of Automation and Electrometry SB RAS, Novosibirsk, Russia
Istituto Nazionale di Ottica del CNR – UOS Pisa, Via Moruzzi 1, 56124 Pisa, Italy
DSFTA, Università di Siena, Via Roma 56, 53100 Siena, Italy

Abstract: Optical characterization of antirelaxation coatings with regard to their applications in coherent spectroscopy and
LIAD experiments is presented. A simple method, based on the recording of the fluorescence intensity of the Rb alkali atoms during resonant light pulse irradiation is used for comparison of the antirelaxation properties of the coatings. The LIAD yield and dynamics are measured by registration of the 780 nm Rb line transmission. The comparison of the parameters of PDMS coatings prepared with two different solutions in ether (PDMS 2% and PDMS 5%) shows that when illuminating with such LED intensity at which the LIAD efficiency is equal in the two cells, the light induced Rb vapor density changes are about an order of magnitude slower in the PDMS 2% cell, and the antirelaxation properties of the two cells are equal.


Volume: 48      Pages from: 173  to: 177

KeyWords: antirelaxation coating; light-induced atomic desorption (LIAD); light-surface interaction; atom-surface interaction;