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Silicon Dioxide Nanostructures-Coated External Cavity for Gain Enhancement of Rhodamine B Lasing Dye

Authors: Mohammed A. Hameed --- Omar A. Ali --- Sarmed S.M. Al-Awadi
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2018 Volume: 14 Issue: 1 Pages: 3-10
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة


In this work, nanostructured silicon dioxide films were deposited by closed-field unbalanced dc magnetron sputtering technique on two sides of quartz cells containing Rhodamine B dye dissolved in ethanol with 10-5 M concentration as a random gain medium. The preparation conditions were optimized to prepare highly pure SiO2 nanostructures with a minimum particle size of about 20nm. The effect of SiO2 films as external cavity for the random gain medium was determined by the laser-induced fluorescence of this medium and an increase of about 200% in intensity was observed after the deposition of nanostructured SiO2 thin films on two sides of the dye cell.

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