We study the propagation characteristics of optical signals in waveguides composed of a double chain of metallic nanoparticles embedded in a dielectric host. We find that the complex Bloch band diagram for the guided modes, derived by the Mie scattering theory including material losses, exhibits strong differences with respect to the previously studied single chain. The results of the model are validated through the finite element solution of the Maxwell equations.
© 2011 Optical Society of America
Original Manuscript: October 25, 2010
Revised Manuscript: February 4, 2011
Manuscript Accepted: February 10, 2011
Published: April 11, 2011
Vol. 6, Iss. 6 Virtual Journal for Biomedical Optics
Massimiliano Guasoni and Matteo Conforti, "Complex dispersion relation of a double chain of lossy metal nanoparticles," J. Opt. Soc. Am. B 28, 1019-1025 (2011)