Characterization of Laser Dye Concentrations in ZnO Nanostructures for Optimization Random Laser Emission Performance

Abstract

Many other nanoforms of zinc oxide (ZnO) structures can be synthesized, such as (spheres, rods, flowers, disks, wall, etc.). However, nanoflowers and nanowires have received particular interest due to their wide range of applications, including biological pollutants, remedial cancer cell killing, gas sensors, and biosensors. In the present work, we investigate the optical and morphological properties of two shaped nanoparticles as scatter centers in the laser active medium on the performance emission of a random laser. Fluorescence and absorption spectra show that 10− 4 M for R6G dye and 0.184 ×1013cm-3 ZnO NPs are the optimal nanocomposite film concentrations for R6G dye. With excitation energies ranging from 3.44 to 28.34 mJ and a repetition rate of 2 Hz, second-harmonic generation Nd: YAG laser ASE spectra of the nanocomposite films were observed. The results indicated a minimum bandwidth (FWHM) of 13 nm at a threshold energy of 8.65 mJ for ZnO NW nanocomposite films at 0.184 × 1013cm-3 with R6G dye at 10− 4 M and PMMA. The ZnO NF nanocomposite film had a FWHM of 11 nm and a threshold energy of 4.8 mJ at the same concentrations of R6G dye on PMMA.