Dispersion characteristics of two-dimensional unmagnetized dielectric plasma photonic crystal

• Published in: Chinese physics B 2010-03, Vol.19 (3), p.353-358
• Main Author: 亓丽梅 杨梓强 兰峰 高喜 李大治
• Format: Article
• Language: English
• Subjects: Dielectric constant; Dielectrics; Dispersions; Particle in cell technique; Photonic crystals; Plane waves; Plasma (physics); Simulation; 二维介质; 光子晶体; 晶体介质; 有效介质理论; 磁化等离子体; 等离子体发生; 等离子体频率; 色散特性
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/19/3/034210

This paper studies dispersion characteristics of the transverse magnetic （TM） mode for two-dimensional unmagnetized dielectric plasma photonic crystal by a modified plane wave method. First, the cutoff behaviour is made clear by using the Maxwell-Garnett effective medium theory, and the influences of dielectric filling factor and dielectric constant on effective plasma frequency are analysed. Moreover, the occurence of large gaps in dielectric plasma photonic crystal is demonstrated by comparing the skin depth with the lattice constant, and the influence of plasma frequency on the first three gaps is also studied. Finally, by using the particle-in-cell simulation method, a transmission curve in the Г - X direction is obtained in dielectric plasma photonic crystal, which is in accordance with the dispersion curves calculated by the modified plane wave method, and the large gap between the transmission points of 27 GHz and 47 GHz is explained by comparing the electric field patterns in particle-in-cell simulation.