我组王肖在Optical Materials 上发表论文

题目：

Nonlinear optical switching behavior of nitrogen-doped carbon dots

作者：

Xiao Wang^a, Liang Bai^a, Lei Shen^b, Bowen Yao^a,***, Hui Huang^a, Yang Liu^a,**, Yinglin Song^b,****,Zhenhui Kang^a,*

单位：

^a Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou,China

^b Department of Physics, Soochow University, Suzhou, China

摘要：

Carbon dots (CDs), as an emerging class of carbon materials, have been recently demonstrated to possessnonlinear optical (NLO) behavior (e.g. nonlinear saturable absorption and reverse saturable absorption) whichpotentially expands CDs new application in optical limiting field. However, NLO switching behavior of CDs hasnot yet been reported in previous literature. In this paper, nitrogen-doped CDs (N-CDs) prepared from 2,3-diaminophenazine showed a switchable NLO behavior from saturable absorption (SA) to reverse saturable absorption (RSA) when the laser energy of incident picosecond pulse increased. By contrast, upon the irradiation ofnanosecond pulse, the N-CDs exhibited only RSA behavior through excited state absorption (ESA) process. Inmechani**, the switching behavior was probably resulted from competition between ground-state absorptionand free carrier absorption (FCA) or two phonon absorption (TPA) processes, where both nitrogen doping andcarbonyl groups of N-CDs were proved to be indispensable for the switching behavior.

影响因子：

2.687

分区情况：

3区

链接：  

 https://www.sciencedirect.com/science/article/pii/S0925346719304252?via%3Dihu