The Physics of ultrafast saturable absorption in graphene.
The Physics of ultrafast saturable absorption in graphene.
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DOI：
10.1364/oe.18.004564
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发表时间：
2010-03
期刊：
影响因子：
3.8
通讯作者：
G. Xing;Hongchen Guo;Xinhai Zhang;T. Sum;C. Huan
中科院分区：
文献类型：
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作者：
G. Xing;Hongchen Guo;Xinhai Zhang;T. Sum;C. Huan
在飞秒（fs）时间范围内，对石墨烯的超快饱和吸收进行了实验和理论研究。这种现象是很好的模型与价带耗尽，导带填充和超快带内载流子热化。后者主要是带内载波载波散射与散射时间为8（+/- 3）fs，这是远远超过其他超快技术的时间分辨率与数百fs的激光脉冲。我们的研究结果强烈表明，石墨烯是一个优秀的原子层饱和吸收体。
The ultrafast saturable absorption in graphene is experimentally and theoretically investigated in the femtosecond (fs) time regime. This phenomenon is well-modeled with valence band depletion, conduction band filling and ultrafast intraband carrier thermalization. The latter is dominated by intraband carrier-carrier scattering with a scattering time of 8 ( +/- 3) fs, which is far beyond the time resolution of other ultrafast techniques with hundred fs laser pulses. Our results strongly suggest that graphene is an excellent atomic layer saturable absorber.