采用有限元法，计算了二维三角晶格椭圆形格点空气孔型光子晶体的TE、TM模式的带隙结构。通过对椭圆形空气孔格点的大小、方向进行改变，研究了填充比、格点方向对带隙的影响。计算结果表明，在空气孔型光子晶体中TE模式更容易形成带隙；不同填充比情况下，格点方向对TE模式和TM模的带隙变化都具有不同影响；不论格点方向如何变化，均未出现完全带隙。

Band gaps of both TE-polarized and TM-polarized modes photonic of two-dimensional triangular-lattice ellipse-lattice-points air-hole photonic crystal are caculated by finite element method. By changing the size and direction of ellipse lattice point air holes, the effects of air hole filling ratio and lattice points direction to the photonic band gaps are studied. The results show that TE-polarized mode band gaps are easier to be formed in air-hole photonic crystal. With different filling ratio, lattice point direction has different effect on both TE-polarized and TM-polarized modes band gaps. There is no complete photonic band gap no matter where lattice points orient.