飞秒
材料科学
吸收(声学)
Z扫描技术
光学
双光子吸收
激光器
饱和吸收
衰减系数
折射率
非线性光学
波长
分析化学(期刊)
光电子学
化学
光纤激光器
物理
色谱法
复合材料
作者
Xin Zheng,Runze Chen,Gang Shi,Jianwei Zhang,Zhongjie Xu,Xiang’ai Cheng,Tian Jiang
出处
期刊:Optics Letters
[The Optical Society]
日期:2015-07-17
卷期号:40 (15): 3480-3480
被引量:141
摘要
The nonlinear properties of black phosphorus (BP) nanoplatelets (NPs) have been characterized with Z-scan measurements under 800-nm femtosecond pulsed laser excitation. A transition from saturable absorption (SA) to reverse saturable absorption (RSA) with the increase of laser intensity was observed in the open-aperture (OA) measurements. Simultaneously, closed-aperture (CA) measurements were carried out to investigate the nonlinear refractive index of BP NPs together, and a value of n(2) ≃(6.8±0.2)×10(-13) m2/W was obtained. The nonlinear absorption properties were analyzed according to the band structure of BP. A theoretical analysis based on SA and two-photon absorption (TPA) was used to determine the nonlinear absorption coefficients from the experimental results, and the TPA coefficient at 800 nm was estimated about (4.5±0.2)×10(-10) m/W.
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