Abstract
A four-layer waveguide structure comprising a dielectric substrate, a metal layer, a left-handed material (LHM) as a guiding layer, and a cladding is investigated as a metal-clad waveguide sensor. Fresnel reflection coefficients are used to study the resonance dips at which the reflectance minimizes. Our calculations show that the proposed structure has a preference over the surface-plasmon resonance structure since it gives a much sharper reflectance dip and can achieve considerable sensitivity improvement. The effects of the LHM permittivity, permeability, and thickness on the reflectance curves is studied.
©2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Zi Hua Wang and Su Ping Li
J. Opt. Soc. Am. B 25(6) 903-908 (2008)
Lu Fa Shen and Zi Hua Wang
J. Opt. Soc. Am. B 24(8) 1847-1852 (2007)
Koray Aydin and Ekmel Ozbay
J. Opt. Soc. Am. B 23(3) 415-418 (2006)