利用外部电场调制单层氧化石墨烯的光学透过率。

Modulation of the optical transmittance in monolayer graphene oxide by using external electric field.

作者信息

Qiao Zhixing, Qin Chengbing, Gao Yan, Zhang Guofeng, Chen Ruiyun, Xiao Liantuan, Jia Suotang

机构信息

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China.

出版信息

Sci Rep. 2015 Sep 25;5:14441. doi: 10.1038/srep14441.

DOI:10.1038/srep14441

PMID:26404872

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5155675/

Abstract

Graphene oxide (GO) emerges as a functional material in optoelectronic devices due to its broad spectrum response and abundant optical properties. In this article, it is demonstrated that the change of optical transmittance amplitude for monolayer GO (mGO) could be up to 24.8% by an external electric field. The frequency harmonics for transmittance spectra are analyzed by use of Fast Fourier Transforms to give an insight into the modulation mechanism. Two physical models, the electrical permittivity and the sheet conductivity which linearly vary as the electric field, are proposed to response for the transmittance modulation. The model-based simulations agree reasonable well with the experimental results.

摘要

由于氧化石墨烯（GO）具有广谱响应和丰富的光学特性，它成为了光电器件中的一种功能材料。在本文中，研究表明单层氧化石墨烯（mGO）的光透射率幅值变化在外部电场作用下可达24.8%。通过快速傅里叶变换分析透射光谱的频率谐波，以深入了解调制机制。提出了两个物理模型，即随电场线性变化的介电常数和表面电导率，来解释透射率调制现象。基于模型的模拟结果与实验结果吻合得相当好。