Photonic Sensors

, Volume 8, Issue 1, pp 80–87 | Cite as

Detection of gain enhancement in laser-induced fluorescence of rhodamine B lasing dye by silicon dioxide nanostructures-coated cavity

Open Access


In this work, nanostructured silicon dioxide films are deposited by closed-field unbalanced direct-current (DC) reactive 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 are optimized to prepare highly pure SiO2 nanostructures with a minimum particle size of about 20 nm. The effect of SiO2 films as external cavity for the random gain medium is determined by the laser-induced fluorescence of this medium, and an increase of about 200% in intensity is observed after the deposition of nanostructured SiO2 thin films on two sides of the dye cell.


Silicon dioxide nanostructures gain enhancement rhodamine B dye 


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© The Author(s) 2017

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Authors and Affiliations

  1. 1.Department of PhysicsAl-Iraqia UniversityBaghdadIraq

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