The New Method for Optical Channel Drop Filter with High Quality Factor Based on Triangular Photonic Crystal Design



We have designed a new type of optical channel drop filter (CDF) based on two dimensional
triangular lattice photonic crystals. CDF operation is based on coupling to the photonic crystal
waveguide. The proposed structure is optimized to work as a CDF for obtaining the CDF
characteristics and band structure of the filter the finite difference time domain (FDTD) method and
plane wave expansion (PWE) method are used respectively. Dropping efficiency at 1550nm and
quality factor (Q) of our proposed structure are 96.36 % and 282.7, respectively. The quantities