Random lasing from dye-doped negative liquid crystals using ZnO nanoparticles as tunable scatters |
(a) Evolution of the emission spectra of dye-doped negative LC solution inside the cell with (0.16 g) ZnO NPs as pump energy increases from 0.71 mJ to 1.98 mJ. (b) Output intensity of the random laser as a function of the incident pump pulse energy obtained from panel (a), where the lasing threshold is 0.71 mJ. |
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