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
Thin films Thin films other properties other properties Nonlinear optics Nonlinear optics materials materials Optical properties Optical properties Ultrafast nonlinear optics Ultrafast nonlinear optics
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.