【摘要】 设计了一种三角形复式晶格结构的光子晶体，在该类晶体中，电介质圆柱在空气中的排列存在Ｅ偏振和Ｈ偏振的光子带隙重叠区，称之为绝对光子带隙；而空气圆孔在电介质中排列时，虽然Ｅ偏振和Ｈ偏振均分别存在光子带隙，但不存在绝对光子带隙。同时利用晶体的光子带结构研究了有效长波介电常数，所得结果与静电理论吻合更多还原

【Abstract】 A triangular non Bravais lattice was designed in this paper, the crystal constructed form dielectric rods in air background can generate a common band gap for both orthogonal polarizations E and H that is called absolute photonic band gap, but the crystal constructed from air circular holes in dielectric matrix can not generate an absolute photonic band gap. The effective long wavelength dielectric constant of this crystal has been calculated using photonic band structure, simultaneously, the results agree with electrostatic theory well.更多还原