Synthesis and nonlinear optical properties of semiconducting single-walled carbon nanotubes at 1 μm
Jichao Shi1, Hongwei Chu, Ying Li
1School of Information Science and Engineering, Shandong University, 72 Binhai Road, Qingdao 266237, P. R. China. hongwei.chu@sdu.edu.cn dechun@sdu.edu.cn.
Abstract:
Herein, we synthesized and extracted pure semiconducting single-walled carbon nanotubes (s-SWCNTs). Moreover, the nonlinear optical (NLO) properties, such as saturable absorption, two-photon absorption coefficient, modulation depth and optical limitation, of s-SWCNTs were experimentally determined using a high-energy 1064 nm nanosecond (ns) laser. Compared with the common SWCNTs, the s-SWCNTs demonstrated lower saturation intensity and lower two-photon absorption (TPA) coefficient. The modulation depth of the s-SWCNTs was as high as 8.6%. Based on these parameters, the s-SWCNTs can be used as excellent saturable absorbers in pulsed laser applications.
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