Investigation of optical density in photonic quasicrystals for filtering applications: Effect of composite layers

Abstract

The optical density in one-dimensional (1D) photonic quasicrystals, such as the symmetric alternating sequence, Thue–Morse sequence, Fibonacci sequence, double-periodic sequence, and Cantor sequence, is investigated in the framework of the transfer matrix method. In order to describe and measure the transmission of light through a photonic quasicrystal, we will study the optical density, which is an important physical property for designing optical filters and can be used to tune the operational wavelength of optical filters and sensors. The effect of composite layers consisting of small inclusion particles (metal fillers) embedded in a host medium on the optical density is shown and discussed by using the Maxwell Garnett effective medium approximation. The influence of the volume filling fraction of metal nanoparticles on the optical density spectrum of photonic quasicrystals and their spectral characteristics is demonstrated. In other words, we discuss the impact of individual components and their fractions in the composite on the optical density and compare the optical density spectra for different 1D photonic quasicrystals.