期刊
OPTICS COMMUNICATIONS
卷 406, 期 -, 页码 244-248出版社
ELSEVIER
DOI: 10.1016/j.optcom.2016.11.036
关键词
Black phosphorus; Nonlinear optical absorption; Pulse duration
类别
资金
- National Natural Science Foundation of China (NSFC) [61435010, 61505117, 61675135]
- Science and Technology Innovation Commission of Shenzhen [KQTD2015032416270385, JCYJ20150625103619275]
- Student Innovation Development Foundation of SZU [S2016002]
- China Postdoctoral Science Foundation [2015M580731]
- Science and Technology Planning Project of Guangdong Province [2016B050501005]
Black phosphorus (BP), is the most thermodynamically stable allotrope of phosphorus, the narrow direct band gap and the strong light-matter interaction make BP a promising nonlinear optical (NLO) nano-material. In this paper, we use the open aperture Z-scan method to measure the NLO property of BP dispersion. Saturable absorption was observed in the BP material through the excitation of Ti: sapphire laser at 800 nm. Three different excitation pulse duration (100 fs, 1 ps and 10 ps) were used in the experiments, and BP exhibited different NLO performance. The results show that nonlinear absorption coefficient and figure of merit of BP nanosheets are proportional to the pulse duration while saturable intensity is opposite to pulse duration. (C) 2016 Elsevier B.V. All rights reserved.
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