CAJ | 학술논문

针对二维光子晶体在自准直传输现象，推导了非正交坐标系下的时域有限差分（ FDTD）模型，有效地计算了二维椭圆基元光子晶体带隙结构。结合等频图分析，从理论上研究了二维椭圆基元光子晶体结构中TM模式的自准直现象，优化设计出宽角度自准直效应模型，并通过高斯波束验证了其无衍射自导传输模式。
침대이유광자정체재자준직전수현상，추도료비정교좌표계하적시역유한차분（ FDTD）모형，유효지계산료이유타원기원광자정체대극결구。결합등빈도분석，종이론상연구료이유타원기원광자정체결구중TM모식적자준직현상，우화설계출관각도자준직효응모형，병통과고사파속험증료기무연사자도전수모식。
In view of the self-collimation transmission phenomenon , a finite-difference time-domain scheme in a nonorthogonal coordinate system is presented to calculate the band structure of a two-dimensional photonic crystal.Self-collimation of photonic crystals in the whole angular range of ±90°in the fourth band of a two-di-mensional photonic crystals with elliptical basis is demonstrated by examining the band structure and equifre -quency contours .non-diffraction guiding modes is verified by a gaussian beam .