Abstract

The theory on induced transmission in absorbing thin films¹,² made it feasible to design dielectric-metal narrow band filters based on the relationship between the optical properties and the optical surroundings of a metal layer. It has been indicated that narrow band reflection and transmission of a metal layer may be induced by a drastic change in the reflection phase shift from the matching stack attached to the emergent boundary of the metal layer³ and that the halfwidth of spectral band was inversely proportional to the phase dispersion power⁴. It can be seen in this paper that a simple expression for the halfwidth of phase dispersion induced transmission (PDIT) filters was a derivative of the induced transmission theory.

© 1998 Optical Society of America