Magnetic Plasmon Propagation Along a Chain of Connected Subwavelength Resonators at Infrared Frequencies

Abstract

A one-dimensional magnetic plasmon propagating in a linear chain of single split ring resonators is proposed. The subwavelength size resonators interact mainly through exchange of conduction current, resulting in stronger coupling as compared to the corresponding magneto-inductive interaction. Finite-difference time-domain simulations in conjunction with a developed analytical theory show that efficient energy transfer with signal attenuation of less then $0.57\mathrm{dB}/\mu \mathrm{m}$ and group velocity higher than $1/4c$ can be achieved. The proposed novel mechanism of energy transport in the nanoscale has potential applications in subwavelength transmission lines for a wide range of integrated optical devices.