Rectangle Lattice Photonic Crystal with Large Absolute Band Gap at Low Frequency;
在低頻區(qū)具有大帶隙的長方晶格二維光子晶體
The rectangle lattice 2D photonic crystal is formed by rectangle grid of dielectric veins and discrete square dielectric rods.
將呈網(wǎng)帶連通的長方網(wǎng)格與呈離散狀態(tài)的正方介質柱組合構成長方晶格光子晶體, 用快速平面波展開法計算其能帶結構, 通過參數(shù)優(yōu)化, 在低頻區(qū)找到最大絕對禁帶寬度Δω=0 105 6ωe(ωe=2πc/a, a為晶格常數(shù), c為光速), 絕對禁帶中心頻率ωc=0 903 8ωe,Δω/ωc=11 7%。
The modified plane-wave expansion method for calculating quickly the band structure is used to study the band structure in two rectangle lattice 2D photonic crystals.
利用快速平面波展開法研究了兩種長方晶格光子晶體,發(fā)現(xiàn)它們在高頻區(qū)都存在大帶隙,經(jīng)參數(shù)優(yōu)化,原胞結構為“工”字形的光子晶體,最大絕對禁帶寬度Δω為0。