Full control of sodium vapor density in siloxane-coated cells using blue LED light-induced atomic desorption

Year: 2009

Authors: Bogi, A; Marinelli, C; Burchianti, A; Mariotti, E; Moi, L; Gozzini, S; Marmugi, L; Lucchesini, A

Autors Affiliation: Univ Siena, CNISM, I-53100 Siena, Italy; Univ Siena, Dept Phys, I-53100 Siena, Italy; CNR, Ist Proc Chimicofis, Area Ric, I-56124 Pisa, Italy

Abstract: We propose and experimentally implement a method, based on light-induced atomic desorption, for controlled generation of large sodium densities in siloxane-coated cells, kept at room temperature. An array of blue LEDs is used to desorb sodium atoms from the cell walls. The required atomic vapor density is achieved and stabilized by controlling the LED power through the feedback given by the sodium fluorescence. We show that sodium densities corresponding to about 400 K can be obtained and kept stable for a long time with less than 6 mW of LED light power. Moreover, this technique allows for precise vapor density modulation with a frequency of tenths of hertz, which is not possible using traditional heating methods. (C) 2009 Optical Society of America

Journal/Review: OPTICS LETTERS

Volume: 34 (17)      Pages from: 2643  to: 2645

KeyWords: Atoms; Desorption; Sodium, Blue LED lights; Coated cells; Density modulation; Full control; LED lights; Light-induced atomic desorptions; Sodium atom; Traditional heating, Light emitting diodes
DOI: 10.1364/OL.34.002643

Citations: 25
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