Open AccessBackpropagating modes of surface polaritons on a cross-negative interface
Author(s) -
Jae Woong Yoon,
Seok Ho Song,
Cheol Oh,
Pill-Soo Kim
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.000417
Subject(s) - permittivity , polariton , surface plasmon polariton , optics , materials science , reflection (computer programming) , reflection coefficient , planar , computer science , optoelectronics , dielectric , surface plasmon , physics , plasmon , computer graphics (images) , programming language
We show that backpropagating modes of surface polaritons can exist at the interface between two semi-infinite cross-negative media, one with negative permittivity (epsilon less than 0) and the other with negative permeability (micro less than 0). These single-interface modes that propagate along the surface of a cross-negative interface are physically of interest, since the single-negative requirements imposed on the material parameters can easily be achieved at terahertz and potentially optical frequencies by scaling the dimension of artificially structured planar materials. Conditions for material parameters that support a backpropagating mode of the surface polaritons are obtained by considering dispersion relation and energy flow density transported by surface polaritons and confirmed numerically by simulation of surface polariton propagation resonantly excited at a cross-negative interface by attenuated total reflection.