Broadband optical limiting response of a graphene-PbS nanohybrid.
Graphene-based materials have shown promising nonlinear optical properties in the visible range. To extend their nonlinear optical response to the near infrared (NIR) region, we prepared a new nanohybrid consisting of uniform PbS quantum dots (QDs) attached on the reduced graphene oxide, named rGO-PbS, via a facile, low-cost, and phosphine-free method. The rGO-PbS nanohybrid exhibited superior optical limiting properties to either graphene oxide or PbS QDs upon both 532 nm and 1064 nm excitation in the nanosecond laser pulse regime, which is attributed to the synergetic effects stemming from charge transfer between the two components. Meanwhile, the thin films containing the rGO-PbS nanohybrid dispersed in polymethylmethacrylate (PMMA) also showed excellent optical limiting properties with high transparency, implying the potential applications of this hybrid material in broadband nonlinear optical devices.
State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory of Special Function Materials and Structure Design (MOE), Lanzhou University, Lanzhou 730000, P. R. China. haoli.zhang@lzu.edu.cn qiangwang@lzu.edu.cn.
Min
M
Zhao
Rui
R
Peng
Qi
Q
Zheng
Qiang
Q
Wang
Meng-Jie
MJ
Chang
Yu
Y
Liu
Ying-Lin
YL
Song
Hao-Li
HL
Zhang