Optical limiting properties and mechanisms of single-layer graphene dispersions in heavy-atom solvents.
Optical limiting properties and mechanisms of single-layer graphene dispersions in heavy-atom solvents.
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DOI：
10.1364/oe.22.031836
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发表时间：
2014-12
期刊：
影响因子：
3.8
通讯作者：
Lihe Yan;Yaobing Xiong;J. Si;Xuehui Sun;Wenhui Yi;X. Hou
中科院分区：
文献类型：
--
作者：
Lihe Yan;Yaobing Xiong;J. Si;Xuehui Sun;Wenhui Yi;X. Hou
利用纳秒脉冲激光研究了单层石墨烯在不同溶剂中的光限幅特性。石墨烯分散体，特别是在重原子溶剂中，与参考的C60-甲苯溶液相比，显示出好得多的OL性质。OL阈值和非线性散射（NLS）强度对溶剂表面张力的依赖关系表明，非线性散射效应在石墨烯分散液的OL过程中起重要作用，而非线性吸收（NLA）效应在重原子溶剂中也可能起作用。NLA测量进一步证明了NLA效应对石墨烯分散体在重原子溶剂中的优异OL性质的贡献。
The optical limiting (OL) properties of single-layer graphene dispersions in different solvents were studied using a nanosecond pulse laser. The graphene dispersions, especially in heavy-atom solvents, showed much better OL properties compared with referenced C60-toluene solution. The dependences of OL thresholds and nonlinear scattering (NLS) intensities on the solvent surface tensions indicated that, NLS effect played an important role in the OL process of graphene dispersions, while nonlinear absorption (NLA) effect might also contribute in solvents with heavy atoms. The NLA measurements further demonstrated the contribution of NLA effect to the excellent OL property of graphene dispersions in heavy-atom solvents.