Two-photon pumped random laser in nanocrystalline ZnO

E. V. Chelnokov (1, 2) , N. Bityurin (1) , Igor Ozerov (2) , Wladimir Marine (2)

1 Institute of Applied Physics of RAS
2 CRMCN - Centre de recherche de la matière condensée et des nanosciences

Thin film of ZnO nanoparticles with dimension of about 5–10 nm were fabricated by the pulsed laser ablation method. By using a femtosecond laser beam at 700 nm to pump micrometer-thick films the authors observed two-photon-induced lasing at 385 nm. Experimentally obtained dependence of the threshold on the excitation spot radius r0 is closer to (1/r_0^2) than to (1/r_0), thus suggesting efficiency of the feedback by scattering-random lasing. The experimental data on nonlinear transmission of the film at the wavelength of pumping are presented.

Domaines: Matière Condensée [cond-mat]; Optique [physics.optics]

E. V. Chelnokov, N. Bityurin, Igor Ozerov, Wladimir Marine. Two-photon pumped random laser in nanocrystalline ZnO. Applied Physics Letters, 2006, 89 (17), pp.171119. ⟨10.1063/1.2370879⟩. ⟨hal-00115824⟩