Transmission and absorption of metallic films coated with corrugated dielectric layers

The authors study theoretically the optical properties of planar metallic films coated with periodically corrugated dielectric layers. Their calculations show that the transmission and absorption for these coated metallic films are enhanced considerably with respect to the uncoated ones. Enhanced transmission and absorption are found to result from the excitations of the coupled surface plasmon polaritons at the coated metallic films. Their results indicate that the introduction of periodically corrugated dielectric coating layers on metallic films offers an excellent approach to tune the reflection, transmission, and absorption properties. (c) 2006 American Institute of Physics.