激光与光电子学进展, 2018, 55 (10): 103001, 网络出版: 2018-10-14  

类石墨烯的光场调控特性

Light Field Modulation of Graphene-Like
作者单位
1 桂林电子科技大学电子工程与自动化学院, 广西 桂林 541004
2 广西高校光电信息处理重点实验室, 广西 桂林 541004
摘要
石墨烯是一种具有二维碳纳米结构的半导体材料, 其在太赫兹波段的研究成果已被用于光电子器件, 而其他二维硫属材料在太赫兹波段的研究却鲜有报道。从理论和实验两方面对高阻硅衬底的石墨烯以及类石墨烯MoS2、WS2在太赫兹波段的吸收机制进行研究。通过太赫兹时域光谱系统测量不同抽运光功率下透过类石墨烯材料的太赫兹光谱, 并进行计算分析, 得到它们的透射谱、光电导率和吸收光谱。结果表明:通过改变光场条件同样可以对这两类类石墨烯材料进行调制; 对于MoS2、WS2, 当施加光场时, 其吸收主要由二硫族化合物激子作用引起。
Abstract
Graphene is a two-dimensional semiconductor material with carbon nanostructure, and it has a wide application prospect in the fields of microchip and materials science. In recent years, the research production of graphene in terahertz band have been used in optoelectronic devices , while the study of other two-dimensional sulfur materials are rarely reported. Therefore, we mainly study the absorption mechanism of graphene and graphene-like MoS2 WS2 on high resistance silicon substrate in the terahertz band from theory and experiment. We measure the terahertz spectrum of graphene-like material with terahertz time-domain spectroscopy system at different pump light powers, and obtain their transmission spectra, photoconductivitis and absorption spectra with calculation and analysis. Results show that we can similarly modulate the two kinds of graphene-like materials by changing the condition of light field. In addition, the absorption of WS2 and MoS2 are caused by the exciton of disulfide when imposing light field.

张文涛, 唐安琪, 张玉婷, 占平平. 类石墨烯的光场调控特性[J]. 激光与光电子学进展, 2018, 55(10): 103001. Zhang Wentao, Tang Anqi, Zhang Yuting, Zhan Pingping. Light Field Modulation of Graphene-Like[J]. Laser & Optoelectronics Progress, 2018, 55(10): 103001.

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