题目：

Third-order nonlinear optical properties of carboxyl group dominant carbon nanodots

作者：

Liang Bai,‡^a Shi Qiao,‡^a Yu Fang,^b Jianguo Tian,^c J. Mcleod,^a Yinglin Song,*^bHui Huang,^a Yang Liu*^a and 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. E-mail: zhkang@suda.edu.cn, yangl@suda.edu.cn

^b Department of Physics, Soochow University, Suzhou, China. E-mail: ylsong@suda.edu.cn

^c The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School and School of Physics, Nankai University, Tianjin, China

‡ These authors contributed equally to this work.

摘要：

We quantitatively investigate the nonlinear optical (NLO) property of carbon nanodots (CNDs, less than 10 nm) by the Z-scan technique using a tunable 532 nm nanosecond laser system. These CNDs were fabricated by an electrochemical etching method from graphite rods. Our results suggested that the third-order nonlinear susceptibility χ⁽³⁾ of CNDs is strongly dependent on the diameter of the CNDs apparently; the nonlinear refractive index γ decreased as the size of CNDs decreased, while the nonlinear absorption coefficient β showed an opposite tendency to γ. We further demonstrated that the carboxyl group on the CND surface plays a key role and has significant impact on the third-order nonlinear susceptibility χ ⁽³⁾.

影响因子：

5.066

分区情况：

一区 

链接： 

http://pubs.rsc.org/en/content/articlelanding/2016/tc/c6tc02313d#!divAbstract