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Abstract
In this paper, a 60° photonic crystal bending geometry for TM modes of a Kagome lattice is proposed. A two dimensional array of dielectric rods with an effective refractive index equal to 3.25 is used for this purpose. The proposed bending structure has a tapered topology which increases the transmission and decreases the reflection to the input waveguide. A bandwidth of 4nm, where the central wavelength is at 1330nm is obtained. Bandwidth is defined as the region where the transmission ratio is higher than 0.8 or equally 1dB. The simulation is performed with the help of two numerical algorithms which are called finite difference time domain (FDTD) and plane wave expansion (PWE) methods.
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