Ultraviolet random lasing from a diamond nanoparticle film

作者：Niyuki Ryo; Takashima Hideaki; Fujiwara Hideki^*; Sasaki Keiji

来源：Applied Physics Letters, 2014, 105(1): 011112.

DOI：10.1063/1.4889080

We demonstrated ultraviolet random lasing from a diamond nanoparticle film, in which commercially available diamond nanoparticles with an average size of 25 nm acted as the gain medium and scatterers. By optically exciting the diamond nanoparticle film at an excitation wavelength of 355 nm, discrete sharp peaks, superposed on a collapsed broad emission spectrum, randomly appeared at wavelengths around the broad emission maximum (similar to 382 nm) when the excitation intensity exceeded the threshold. From the dependence of lasing peak intensities measured at different locations as a function of excitation intensity, the threshold was estimated to be approximately several tens of MW/ cm(2).

• 出版日期2014-7-7