Eur. Phys. J. Appl. Phys. 80, 20501 (2017)
https://doi.org/10.1051/epjap/2017170241

Regular Article

Competition and evolution of dielectric waveguide mode and plasmonic waveguide mode

School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang 212013, PR China

^* e-mail: fang_yt1965@sina.com

Received: 9 July 2017
Received in final form: 28 August 2017
Accepted: 15 September 2017
Published online: 27 October 2017

Abstract

In order to study the coupling and evolution law of the waveguide mode and two plasmonic surface modes, we construct a line defect waveguide based on hexagonal honeycomb plasmonic photonic crystal. Through adjusting the radius of the edge dielectric rods, the competition and evolution behaviors occur between dielectric waveguide mode and plasmonic waveguide mode. There are three status: only plasmonic waveguide modes occur for r_A < 0.09a; only dielectric waveguide modes occur for r_A > 0.25a; two kinds of modes coexist for 0.09a < r_A < 0.25a. The plasmonic waveguide mode has advantages in achieving slow light.