不同激发激光功率下石墨烯的太赫兹波调制特性

Terahertz wave modulation properties of graphene with different excitation laser power.

作者信息

Chen Shaohang, Yang Ruizhao, Zhou Yanni, Qin Binyi, Li Yun, Zheng Jincun, Liang Yizhi, Li Tinghui, Liu Jianming

机构信息

School of Electronic and Automation, Guilin University of Electronic Technology Guilin 541004 China.

School of Electronic and Automation, Guilin University of Aerospace Technology Guilin 541004 China.

出版信息

RSC Adv. 2022 Sep 26;12(42):27275-27280. doi: 10.1039/d2ra04133b. eCollection 2022 Sep 22.

DOI:10.1039/d2ra04133b

PMID:36276014

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9512082/

Abstract

The terahertz wave modulation properties of graphene were investigated using an external 975 nm continuous wave laser with different power. Upon excitation laser, the transmission and modulation depth was measured using terahertz time-domain spectroscopy. The experimental results showed that the modulation depth of monolayer graphene and 3-layer graphene was 16% and 32% under the 1495 mW excitation power. Further, we analyzed the graphene modulation mechanism based on the Drude model and the thin-film approximation. Both theoretical analysis and calculation results showed that the terahertz wave could be modulated using graphene with different excitation laser power.

摘要

利用具有不同功率的外部975nm连续波激光研究了石墨烯的太赫兹波调制特性。在激发激光作用下，使用太赫兹时域光谱测量了透射率和调制深度。实验结果表明，在1495mW激发功率下，单层石墨烯和3层石墨烯的调制深度分别为16%和32%。此外，我们基于德鲁德模型和薄膜近似分析了石墨烯调制机制。理论分析和计算结果均表明，利用不同激发激光功率的石墨烯可以调制太赫兹波。