Terahertz Optoelectronic Property of Graphene: Substrate-Induced Effects on Plasmonic Characteristics

Applied Sciences

I-Tan Lin²  Yi-Ping Lai²  Kuang-Hsiung Wu¹ 

[1] Department of Electrophysics, National Chiao-Tung University, Hsinchu 300, Taiwan; E-Mail:;Electrical Engineering Department, University of California, Los Angeles, Los Angeles, CA 90095, USA; E-Mails:

关键词: graphene;    plasmon;    coupling;    phonon;    scattering rate;    optical conductivity;    terahertz;    Drude model;   

DOI  :  10.3390/app4010028

来源: mdpi

【 摘 要 】

The terahertz plasmon dispersion of a multilayer system consisting of graphene on dielectric and/or plasma thin layers is systematically investigated. We show that graphene plasmons can couple with other quasiparticles such as phonons and plasmons of the substrate; the characteristics of the plasmon dispersion of graphene are dramatically modified by the presence of the coupling effect. The resultant plasmon dispersion of the multilayer system is a strong function of the physical parameters of the spacer and the substrate, signifying the importance of the substrate selection in constructing graphene-based plasmonic devices.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.