论文部分内容阅读
将时域有限差分法 (FDTD)用于光子晶体传输特性研究 ,以二维方格子光子晶体TM模为研究对象 ,分别讨论了光子晶体制作过程中圆柱半径和晶格常量误差对光子晶体传输特性和光子晶体器件性能的影响。研究表明 ,圆柱半径和晶格常量的误差越大 ,光子晶体的带隙效果越差 ,在一定的误差范围里 ,光子晶体的传输特性能够被很好地保持 ;由于误差的存在 ,光子晶体点缺陷所形成的微腔的共振频率位置与理想情况发生了漂移 ;加工精度误差对光子晶体器件性能有较大影响。
The finite-difference time-domain (FDTD) method is used to study the propagation characteristics of photonic crystals. Two-dimensional square lattice photonic crystal TM mode is taken as the research object. The effects of cylindrical radius and lattice constant errors on photonic crystal transmission properties And photonic crystal device performance. The results show that the larger the error of the column radius and the lattice constant, the worse the bandgap effect of the photonic crystal. The transmission characteristic of the photonic crystal can be well maintained within a certain error range. Because of the error, the photonic crystal point The position of the resonance frequency of the microcavity formed by the defect drifts with the ideal situation. The error of the processing accuracy has a great influence on the performance of the photonic crystal device.