基于FDTD的三维光子晶体设计与测试

Design and Test of 3D Photonic Crystal Based on FDTD

光子晶体是一种新型的人工结构功能材料,通过不同结构,以实现控制光传播的功能。由于三维光子晶体的制备比较复杂,而且制备的成本又比较高,因此根据需要先通过理论设计光子晶体,并模拟计算其特性,后选出符合性能要求的结构,能为实际制备提供指导,大大减少制备的盲目性。应用R-soft软件FullWAVE/FDTD和BandSOLVE两大模块进行仿真。其中FullWAVE/FDTD模块通过FDTD方法模拟计算不同结构的光子晶体的光场分布,而BandSOLVE模块则利用平面波展开方法计算预测光子禁带。根据模拟结果,再设计用于制备三维光子晶体的光刻模版。

As new artificial materials the photonic crystals are made of periodic arrangement of dielectric or metallic structures.The plane-wave expansion and the finite difference time domain methods are used to analyze the photonic crystal band gap and simulate its optical field distribution respectively. Besides, based on the simulation results from R-soft software FullWAVE/FDTD and BandSOLVE, we find that the holes arrangement, lattice constant, and film refractivity have a great influence on the photonic crystal band gap and optical distribution. Considering these factors,we design lithographic templates to prepare 3D Photonic Crystal.