CAJ | 학술논문

用有限时域差分法(FDTD)和Padé近似分析了二维光子晶体的能带结构和缺陷引起的局域态.针对介电常数对比和填充率对完整光子晶体中光子禁带以及缺陷态的影响作了研究.计算了不同缺陷的光子晶体模式的振荡频率和质量因子.数值模拟的结果表明通过改变介电参数对比和填充率可以实现对光子禁带的位置、宽度、数目以及对缺陷态的调整.
용유한시역차분법(FDTD)화Padé근사분석료이유광자정체적능대결구화결함인기적국역태.침대개전상수대비화전충솔대완정광자정체중광자금대이급결함태적영향작료연구.계산료불동결함적광자정체모식적진탕빈솔화질량인자.수치모의적결과표명통과개변개전삼수대비화전충솔가이실현대광자금대적위치、관도、수목이급대결함태적조정.
The band structure of 2D photonic crystals (PCs) and localized states resulting from defects are analyzed by finite-difference time-domain (FDTD) technique and Padé approximation. The effect of dielectric constant contrast and filling factor on photonic bandgap (PBG) for perfect PCs and localized states in PCs with point defects are investigated. The resonant frequencies and quality factors are calculated for PCs with different defects. The numerical results show that it is possible to modulate the location,width and number of PBGs and frequencies of the localized states only by changing the dielectric constant contrast and filling factor.