Effects of using different plasmonic metals in metal/dielectric/metal subwavelength waveguides on guided dispersion characteristics

Abstract

The fundamental guided dispersion characteristics of guided light in a subwavelength dielectric slit channel embedded by two different plasmonic metals are investigated when varying the gap width. As a result, an overall and salient picture of the guided dispersion characteristics is obtained over a wide spectrum range below and above the plasma frequencies of the two different plasmonic metals, which is important preliminary information for analyzing this type of subwavelength waveguide. In particular, the effects of using two different metals on the guided mode dispersions are emphasized in comparison with the effects of using the same plasmonic metal cladding.

13 pages, 3 figures, typos corrected, reference added, text modified

References in corpus (4)

• Compensation of loss in propagating surface plasmon polariton by gain in adjacent dielectric medium
• Strong Off-Resonant Enhancement of Spontaneous Emission in Metal-Dielectric-Metal Plasmon Waveguide Structures
• Resonant-tunnelling-assisted crossing for subwavelength plasmonic slot waveguides
• Optical guided dispersions and subwavelength transmissions in dispersive plasmonic circular holes