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石墨烯的超快载流子动力学和宽波段饱和吸收特性研究
发表时间：2017-01-15 浏览量：2986 下载量：1008
| 全部作者： | 蒋雅琴 |
| 作者单位： | 95857部队 |
| 摘 要： | 为使石墨烯材料更好地应用在超快光电领域，从形态、层数和激发光强几个方面，系统研究石墨烯的超快载流子动力学，发现形态和层数对石墨烯动力学过程没有影响，而激发光强可以改变载流子浓度，从而改变石墨烯的超快弛豫过程。然后，利用开孔Z扫描测量技术，研究石墨烯从可见光到中红外波段下的非线性吸收特性，发现其具有超宽波段可饱和吸收特性，有潜力应用在超快光纤激光器和开关中。 |
| 关 键 词： | 光学；石墨烯；超快载流子动力学；非线性吸收 |
| Title： | Ultrafast carrier dynamics and broadband saturable absorption in graphene |
| Author： | JIANG Yaqin |
| Organization： | Troops No. 95857, Xiaogan |
| Abstract： | In order to make graphene material better application in ultrafast optoelectronic field, in this paper, systematical study of the ultrafast carrier dynamics in graphene from the shape, layers and excitation intensity was made. It is found that the shape and number of layers don’t affect the dynamics process, but the excitation intensity can change carrier concentration, thus change the ultrafast relaxation process of graphene. Then we studied the nonlinear absorption through open aperture Z-scan system from the visible to the mid-infrared broadband frequency range. This finding suggests the saturable absorption property of graphene with possible applications as a passive Q-switcher and mode-locker in ultrafast lasers and ultrafast optical switches. |
| Key words： | optics; graphene; ultrafast carrier dynamics; nonlinear absorption |
| 发表期数： | 2017年1月第1期 |
| 引用格式： | 蒋雅琴. 石墨烯的超快载流子动力学和宽波段饱和吸收特性研究[J]. 中国科技论文在线精品论文，2017，10（1）：28-34. |
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