Spectral transfer function of a periodic multistack including Veselago layers: formal analogy with the Airy function of a Fabry-Perotresonator

摘要

We theoretically investigate a periodic multistack made of alternating layers of positive and negative refractive index. Under normal incidence, its transfer function exhibits spectral resonances highly reminiscent of the Airy function of a classical Fabry-Perot resonator. We use Transfer Matrix Formalism and Coupled-Mode Theory to rigorously establish that analogy, which stems from a deep, although hidden, identity between the two structures.