在本論文中，利用介電質圓柱以正方晶格排列而成的二維光子晶體設計一光塞取濾波器。光塞取濾波器主要由兩部份所組成，一為在晶體內置入線缺陷形成的光波導元件，另一為頻率選擇元件，由在晶體中形成共振腔而成。
　　首先在頻率域利用平面波展開法計算出所設計之晶格排列下的光子晶體能隙。接著，利用時域有限差分法配合一完美匹配層的邊界條件來模擬光塞取濾波器的動態特性。由數值模擬的結果證實此濾波器能有效率地塞取特定的波長。

　　A design of a channel drop filter in a two-dimensional photonic crystal with a square lattice of dielectric rods is presented. The system consists of two parts, one is waveguiding elements realized by linear defects in a photonic crystal, and the other is frequency-selective elements realized by photonic crystal microcavities.
　　First, we compute the photonic crystal bandgap of the lattice configuration used to design the filter by the plane wave expansion method( PWM ) in the frequency domain. Then, the finite difference time domain numerical simulations of the dynamic behavior of the filter are obtained. The perfectly matched layer boundary conditions are applied. Numerical results demonstrate that the filter exhibit very efficient transfer characteristics.

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