Photonics Research, 2015, 3 (2): 020000A1, Published Online: Jan. 6, 2016  

Sign of differential reflection and transmission in pump-probe spectroscopy of graphene on dielectric substrate Download: 1124次

Author Affiliations
1 The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics Institute and School of Physics, Nankai University, Tianjin 300457, China
2 College of Science, Tianjin Polytechnic University, Tianjin 300387, China
3 The Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science & Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
Abstract
Pump-probe differential reflection and transmission spectroscopy is a very effective tool to study the nonequili-brium carrier dynamics of graphene. The reported sign of differential reflection from graphene is not explicitly explained and not consistent. Here, we study the differential reflection and transmission signals of graphene on a dielectric substrate. The results reveal the sign of differential reflection changes with the incident direction of the probe beam with respect to the substrate. The obtained theory can be applied to predict the differential signals of other two-dimensional materials placed on various dielectric substrates.

Chengmin Gao, Xin Zhao, Jun Yao, Xiao-Qing Yan, Xiang-Tian Kong, Yongsheng Chen, Zhi-Bo Liu, Jian-Guo Tian. Sign of differential reflection and transmission in pump-probe spectroscopy of graphene on dielectric substrate[J]. Photonics Research, 2015, 3(2): 020000A1.

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