论文信息 - Competition between two lasing modes of Sulforhodamine 640 in highly scattering media.

Competition between two lasing modes of Sulforhodamine 640 in highly scattering media.

Two lasing modes are observed for Sulforhodamine 640 in highly scattering media pumped by 3-ns 532-nm laser pulses. The stimulated-emission thresholds are found to depend on both concentration of laser dye and scattering particle density. At 2.5 x 10(-2) M dye solution with TiO(2) scattering nanoparticles from 5 x 10(9) cm(-3) to 10(11) cm(-3), the thresholds are found to decrease by more than 2 orders of magnitude. The dominating lasing modes are found to switch from 650 to 620 nm with the increase of density of scatterers.

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