Figure 1 | Lasing characterization of an individual PtNPs@ZnO:Ga MW upon optically pumped. (IMAGE)
Caption
a, Schematic showing the home-built micro-PL measuring equipment, in which the single ZnO:Ga MW covered by large size PtNPs was pumped by a 325 nm fs-amplified laser. b, SEM image of a single ZnO:Ga MW covered by PtNPs. Inset: Enlarged SEM image of the PtNPs, which are deposited on the side surface of ZnO:Ga MW. The diameter of the deposited PtNPs is extracted to about 130 nm. c, PL emission spectra of an individual PtNPs@ZnO:Ga MW at different pump power densities below and above the threshold. d, Integrated PL intensity and spectral linewidth of the lasing peak as a function of pump fluence, yielding a threshold fluence of Pth ~ 66.2 μJ·cm⁻². e, Magnified PL spectrum of the 388.5 nm lasing mode. The dots and line are experimental data and Lorentz function fitting curve, respectively. The spectral FWHM of the lasing peak is extracted to about 0.16 nm, and the Q-factor value is calculated to approximately 2430.
Credit
by Xiangbo Zhou, Mingming Jiang, Kai Xu, Maosheng Liu, Shulin Sha, Shuiyan Cao, Caixia Kan, and Da Ning Shi
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Credit must be given to the creator.
License
CC BY