Abstract
In this paper, the design and performance of two dimensional (2-D) photonic crystal (PhC) channel drop filter is investigated using finite difference time domain (FDTD) method. Plane wave expansion (PWE) method has been utilized to calculate the photonic band gap (PBG). The channel drop filter has been optimized for telecommunication wavelengths λ1 = 1.531 µm and λ2 = 1.551 µm for two designs with refractive indices 3.11 and 3.325, respectively. The number of rods in Z direction is 21 and in X direction is 20 with lattice constant 0.540 nm. By varying the radius of scatter rods of PCRR, it is observed that this filter may be used for filtering several other channels also. The designed structure is useful for CWDM systems. This device may serve as a key component in photonic integrated circuits. The device is ultra compact with the overall size around 123 µm2.
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