https://doi.org/10.1140/epjd/e2017-70223-y
Regular Article
Graphene loaded double ridge plasmon Terahertz waveguide
1 Terahertz Research Center, School of Physical Electronics, University of Electronic Science and Technology of China, Cooperative Innovation Centre of Terahertz Science, Chengdu 610054, P.R. China
2 State Key Laboratory of Millimeter Waves, City University of Hong Kong, 83 Tat Chee Av., Kowloon, SAR, Hong Kong, P.R. China
a
e-mail: rbzhong@uestc.edu.cn
Received: 29 March 2016
Received in final form: 1 November 2016
Published online: 11 April 2017
In this paper, a single-mode graphene loaded double ridge plasmon waveguide (GDRW) with long propagation length and strong mode confinement is proposed. The characteristics of the guided modes are investigated in detail, and tunable single-mode transmission with good performance can be realized either by changing the Fermi energy level or by optimizing the key structural parameters. High figures of merit and much lower crosstalk are obtained due to the dramatically suppressed interference between two parallel placed GDRWs, enabling thereby more tightly stacking in terahertz integrated circuits. Further investigation on fabrication errors, such as the horizontal misalignment of the two symmetric ridges, fabrication distortion of rectangular ridges, and variation of ridge tip curvature radius, indicates that the proposed structure has enough fabrication error tolerance. The results are greatly expected to facilitate the application of high-density terahertz integrated circuits.
Key words: Optical Phenomena and Photonics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2017
