Existing conditions of full bandgaps and absolute negative refraction in metallic-dielectric photonic crystal

• 来源期刊: 中国物理（英文版）
• 关键词: metallic-dielectric photonic crystal absolute photonic band gap absolute negative refraction
• 年，卷（期）: 2007,（4）
• 页码范围: 1057-1061
• 页数: 5页
• 语种: 英文

摘要

This paper has theoretically studied the characteristic frequencies of band structures in two-dimensional metallicdielectric photonic crystals. It is demonstrated that a large filling fraction benefits the existence of absolute photonic band gap, while a smaller filling fraction benefits an absolute negative refraction band. In addition, it also finds that the relation between the cut-off frequency of E-polarized wave and the filling fraction exceeding 10% is content with a linear increasing function, whose coefficients are exponential to the normalized lattice constant. These investigations have significant implications for tuning the operational frequencies to desired applications and manufacturing photonic crystals.