Abstract

We study the effect of surface electron scattering inside metal layers on photonic spectrum, transmissivity, reflectivity, and absorption of periodic dielectric-metal structures in the infrared frequency range. We demonstrate that consideration of finite probability of nonspecular scattering of the conduction electrons by metal layer boundaries is essential: an increase in diffusivity of the metal layer boundaries can lead to disappearance of some Fabry–Perot resonant peaks and substantially alter the shape of the transmission, reflection, and absorption spectra, which gradually transform to virtually flat plateaus. The presented study can be used for interpretation of experimental data on scattering of electromagnetic waves by dielectric-metal multilayers under a lack of detailed information on the state of the metal layer boundaries.

© 2019 Optical Society of America

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