Abstract
Waveguides at interfaces with a linearly graded permittivity between a metal and a dielectric are studied. Analytic expressions for the dispersion relations, modes, losses, and cutoff wavelengths are derived and agree well with simulations. The gradation results in anomalous dispersion, a reduction in the energy velocity, and increased field confinement in the metal–dielectric transition region. These effects lead to increased propagation losses, which are sensitive to the spatial extent of the interface gradation.
© 2011 Optical Society of America
Full Article | PDF ArticleMore Like This
John A. Polo, Jr. and Akhlesh Lakhtakia
J. Opt. Soc. Am. B 28(3) 567-576 (2011)
Muhammad Faryad, Anthony Shoji Hall, Greg D. Barber, Thomas E. Mallouk, and Akhlesh Lakhtakia
J. Opt. Soc. Am. B 29(4) 704-713 (2012)
A. Lupu, N. Dubrovina, R. Ghasemi, A. Degiron, and A. de Lustrac
Opt. Express 19(24) 24746-24761 (2011)