Symmetry properties of solutions in admittance matching method

Abstract

The admittance matching method is generally used in the design of optical components which require in the same time high reflectance and high transmission bands. The matching is done at one or at both sides of the basic stack by synthesizing a symmetrical three layer periods with an equivalent layer. In order to obtain a broad transmission band, a quasi-matching is necessary around the matching wavelength [1, 2]. In the following, one analyzes some symmetry regularities exhibited by the solutions obtained for two or three periods in the matching stack.