Plasmon modes of circular cylindrical double-layer graphene

Authors

Tao Zhao, Cooperative Innovation Centre Of Terahertz Science,
Min Hu, University of Electronic Science and Technology of China
Renbin Zhong, University of Electronic Science and Technology of China
Xiaoxing Chen, University of Electronic Science and Technology of China
Ping Zhang, University of Electronic Science and Technology of ChinaFollow
Sen Gong, Cooperative Innovation Centre Of Terahertz Science
C Zhang, University of WollongongFollow
Shenggang Liu, University of Electronic Science and Technology of China

RIS ID

109911

Publication Details

Zhao, T., Hu, M., Zhong, R., Chen, X., Zhang, P., Gong, S., Zhang, C. & Liu, S. (2016). Plasmon modes of circular cylindrical double-layer graphene. Optics Express, 24 (18), 20461-20471.

Abstract

In this paper, a theoretical investigation on plasmon modes in a circular cylindrical double-layer graphene structure is presented. Due to the interlayer electromagnetic interaction, there exist two branches of plasmon modes, the optical plasmon mode and the acoustic plasmon mode. The characteristics of these two modes, such as mode pattern, effective mode index and propagation loss, are analyzed. The modal behaviors can be effectively tuned by changing the distance between two graphene layers, the chemical potential of graphene and the permittivity of interlayer dielectric. Importantly, the breakup of tradeoff between mode confinement and propagation loss is discovered in the distance-dependent modal behavior, which originates from the unique dispersion properties of a double-layer graphene system. As a consequence, both strong mode confinement and longer propagation length can be achieved. Our results may provide good opportunities for developing applications based on graphene plasmonics in circular cylindrical structure.