Finite difference time domain method for calculating the band structure of a 2D photonic crystal and simulating the lensing effect

24th IUPAP Conference on Computational Physics

物理学;计算机科学

Dastjerdi, S Rafiee^1 ; Ghanaatshoar, M.^1

Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Evin 1983963113, Tehran, Iran^1

关键词: 2-D photonic crystals;    Effective negative refractions;    Near-infrared domains;    Negative phase velocity;    Orthogonal coordinates;    Perfectly Matched Layer;    Photonic band diagram;    Two dimensional square lattice;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/454/1/012011/pdf
DOI  :  10.1088/1742-6596/454/1/012011

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

A finite difference time domain method based on regular Yee's algorithm in an orthogonal coordinate system is utilized to calculate the band structure of a two-dimensional square-lattice photonic crystal comprising dielectric cylinders in air background and to simulate the image formation of mentioned structure incorporating the perfectly matched layer boundary condition. By analyzing the photonic band diagram of this system, we find that the frequency region of effective negative refraction exists in the second band in near-infrared domain. In this case, electromagnetic wave propagates with a negative phase velocity and the evanescent waves can be supported to perform higher image resolution.