Optical Properties of One-Dimensional Double-Negative Photonic Crystals

• Main Authors: Su, Yi-En, 蘇怡恩
• Other Authors: Wu, Chien-Jang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/fnz9xt

碩士 === 國立臺灣師範大學 === 光電科技研究所 === 105 === In this study, we discussed the one-way absorptance of a one-dimensional photonic crystal. To find the resonance point, we compared the spectrums of the TE wave forward and reversed incidence the photonic crystal. The more difference between absorptance of forward and reversed incidence at the resonance point means the better effect to it. In recent years, the optical properties of photonic crystals with double-negative (DNG) materials have received much attention, so in this study we focused on the photonic crystal which contained DNG material. The photonic crystal is composed of the double-negative and double-positive (DPS) materials with regular arrangement. In each chapter, we used different materials which were DNG, DPS and epsilon-negative (ENG) as a defect layer. We used Lorentz model to describe the permittivity and permeability of the DNG and ENG materials, and used Transfer Matrix Method (TMM) to calculate the absorptance. We observed the one-way absorptance of photonic crystal by changing the magnetic loss, electric loss, or the number and thickness of the layers. The effect of magnetic loss to the spectrum is much more obvious than that of electric loss. Numbers of the material layers would influence the absorptance and affect the position of resonance points. According to different thickness of the materials, the spectrum could be shifted to higher or lower frequency. We discussed the materials with different permittivity and permeability, and then reconstructed a photonic crystal with these materials. Furthermore, we calculated optical properties of the photonic crystal with numerical method under different circumstances, and could consequently modulate the optical properties of this photonic crystal.