Document Type : Research
Authors
Department of Physics, Shabestar Branch, Islamic Azad University, Shabestar, Iran
Abstract
This study numerically investigates the optical density in a one-dimensional photonic crystal structure composed of alternating layers of silica and zirconia deposited on a polycarbonate substrate. The analysis employs the transfer matrix method to evaluate trnsmission spectra of both transverse electric and transverse magnetic polarizations. Within the 400-1600 nm spectral range, the structure exhibits a photonic bandgap spanning 750-1200 nm. The results show that The edges of this band gap are shifted towards shorter wavelengths in both transverse electric and transverse magnetic polarizations with increasing angle of incidence. Also, We observed distinct polarization-dependent behavior: optical density gradually increases with angle for TE polarization while decreasing for TM polarization. Our analysis confirms an inverse relationship between transmittance and optical density; lower transmittance corresponds to higher optical density, and vice versa. These findings can be used in spectroscopic analysis, optical sensing technologies, advanced optical window design, and radiation shielding applications, etc.
Keywords
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