CAJ | 학술논문

研究有旋转六角洞的三角点阵二维光子晶体的带结构,探索单元核几何对称性减少对绝对带隙值和局域缺陷模频率值的影响.对洞的中等旋转角,我们揭示此结构的最大绝对带隙可以获得,且该角依赖于洞的半径和背景材料的折射指数.我们也研究了由洞的缺失产生的缺陷模的特点,讨论了此结构模的可调性.
연구유선전륙각동적삼각점진이유광자정체적대결구,탐색단원핵궤하대칭성감소대절대대극치화국역결함모빈솔치적영향.대동적중등선전각,아문게시차결구적최대절대대극가이획득,차해각의뢰우동적반경화배경재료적절사지수.아문야연구료유동적결실산생적결함모적특점,토론료차결구모적가조성.
We study the bandgap structure of two-dimensional photonic crystals created by a triangular lattice of rotated hexagonal holes, and explore the effects of the reduced symmetry in the unit-cell geometry on the value of the absolute bandgap and the frequencies of localized defect modes. We reveal that a maximum absolute bandgap for this structure is achieved for an intermediate rotation angle of the holes. This angle depends on the radius of the holes and the refractive index of the background material. We also study the properties of the defect modes created by missing holes, and discuss the mode tunability in such structures.