TY - JOUR ID - TI - Characterization of Highly-Pure Silicon Dioxide Nanoparticles as Scattering Centers for Random Gain Media AU - Hayder G. Fahad AU - Oday A. Hammadi PY - 2020 VL - 16 IS - 2 SP - 37 EP - 42 JO - Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية SN - 18132065 23091673 AB - In this work, silicon dioxide thin films were prepared and deposited on glass substrates by dc reactive magnetron sputtering technique. The film material was extracted from the substrates as powder by conjunctional freezing-assisted ultrasonic extraction method. The structural characterization of the extracted powder confirmed the formation of nanostructures as the particle size was ranging in 19-34 nm. They also confirmed the high purity of these nanostructures as no other compound than silicon dioxide was observed in the final samples. The extracted nanopowder was employed as scattering centers in Rhodamine B dye solution and the spectral measurements showed that the relative enhancement in fluorescence of the dye solution containing silicon dioxide nanoparticles exceeds 25%, which highly encourages considering these results to prepare random gain media. These results can effectively be used to design and fabricate random gain media with low production cost, high spectral quality and good reliability for wavelength narrowing and tuning.

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