CAJ | 학술논문

用全矢量平面波方法与多极方法联合数值研究六重对称带隙型光子晶体光纤的基模特性.通过全矢量平面波方法可确定组成PBG-PCF的二维光子晶体的带隙,基模(束缚模)存在其频率要落在带隙内且须在k_0α=βα的直线附近上部区域,在带隙外形成辐射(泄漏模).把频率作为输入变量用多极方法计算,数据导出用MATLAB数学软件作出模场分布图,结果发现,不是所有基模可能存在的区域都有基模存在,为带隙型光子晶体光纤的基模寻找提供一种可行的方法.
용전시량평면파방법여다겁방법연합수치연구륙중대칭대극형광자정체광섬적기모특성.통과전시량평면파방법가학정조성PBG-PCF적이유광자정체적대극,기모(속박모)존재기빈솔요락재대극내차수재k_0α=βα적직선부근상부구역,재대극외형성복사(설루모).파빈솔작위수입변량용다겁방법계산,수거도출용MATLAB수학연건작출모장분포도,결과발현,불시소유기모가능존재적구역도유기모존재,위대극형광자정체광섬적기모심조제공일충가행적방법.
Numerical investigation on fundamental mode of PBG-PCF with six-fold rotation symmetry is carried out with full-vector plane wave and multipole method. Band gap of two-photonic crystal, constituting PBG-PCF, is determined by full-vector plane wave method. Frequency of possible existing fundamental modes( bound modes) are not only in band gap but also above line k_0α = βα. Radiation modes exist out of baud gap. Multipole method is performed with input frequency as variables. Field distribution of fundamental mode is plotted by MATLAB. It indicates that fundamental modes do not exist in all possible domains. It gives a feasible method to find fundamental modes of PBG-PCF,