CAJ | 학술논문

研究了基于一维电介质-磁光子晶体的全方向全反射镜(简称全反镜).利用传输矩阵法分析了全反镜的传输特性.为了获得宽频带全反镜,利用十进制遗传算法优化全反镜的结构参量,即层厚度系数与周期数.设计过程逐步详细阐述.计算结果表明,随着参加优化的变量(厚度系数和周期数)数增多,全反带更宽,薄膜层数更少、结构总厚度更薄.最后得到了一个宽带全反镜(0.255A0.255B)~5(0.169A0.066B)~8,其带宽可达1.34ω_0,而薄膜层数大幅降为26层,总厚度仅为1.8634λ_0,结构也非常简单.
연구료기우일유전개질-자광자정체적전방향전반사경(간칭전반경).이용전수구진법분석료전반경적전수특성.위료획득관빈대전반경,이용십진제유전산법우화전반경적결구삼량,즉층후도계수여주기수.설계과정축보상세천술.계산결과표명,수착삼가우화적변량(후도계수화주기수)수증다,전반대경관,박막층수경소、결구총후도경박.최후득도료일개관대전반경(0.255A0.255B)~5(0.169A0.066B)~8,기대관가체1.34ω_0,이박막층수대폭강위26층,총후도부위1.8634λ_0,결구야비상간단.
The omnidirectional total reflectors based on one-dimensional dielectric and magnetic photonic crystals were investigated in this paper.The transmission matrix method was adopted to analyze the transmission properties of such reflectors.In order to obtain broad omnidirectional total reflection bandwidth,the decimal Genetic algorithm was used to optimize their structural parameters including the thickness ratios of the layers and the numbers of periods.The calculation results show that,with the more parameters(including the number of periods and the thickness ratios of the layers) participating in the optimization,the omnidirectional total reflection band becomes wider,the number of the layers becomes less,and the total thickness of the whole structure becomes thinner.Finally,an optimal design described as(0.255A0.255B)~5(0.169A0.066B)~8 is obtained.The omnidirectional total reflection bandwidth can reach to 1.34ω_0,the number of the layers is just 26,and the whole thickness is just 1.8634λ_0.The whole structure is very simple.