Fu Xiuli, Qian Jingwen, Qiao Xiaofen, Tan Pingheng, Peng Zhijian
Opt Lett. 2014 Nov 15;39(22):6450-3. doi: 10.1364/OL.39.006450.
We report the nonlinear optical (NLO) properties of vertically stood WS2 nanoplates excited by 532-nm picosecond laser light. The nanoplates were synthesized by a no-catalyst thermal evaporation process. Raman spectroscopy and x-ray diffraction pattern indicate that the nanoplates are of high crystal quality. The nanoplates exhibit large nonlinear saturable absorption but negligible nonlinear refraction. Mechanisms of the NLO response are proposed.
