Study of the photonic crystal waveguide based on 2D compound lattice structure

Abstract

By employing 2D plane wave expansion (PWE) and finite difference time domain (FDTD) methods, a photonic crystal waveguide (PCW) based on the compound square lattice structure is presented. Band-gap can be observed for TM polarization and compared with the simple lattice structure based on the same material, the band-gap is increased by 62.7%. By optimizing the parameters we get the PCW with the propagation only near the wavelength of 1.55 µm and a flat group index curve in a wide wavelength range of 40 nm. And the group velocity dispersion compensation can be realized by the structure optimization. The results provide a reference for the study and application of photonic crystal waveguide based on the compound lattice structure.

Keywords

Transverse Magnetic / Defect Mode / Finite Difference Time Domain / Plane Wave Expansion / Photonic Crystal Waveguide

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