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.
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This work has been supported by the National Basic Research Program of China (No. 2006CB604901), the National Natural Science Foundation of China (No. 60807016), and the Doctoral Fund of Ministry of Education of China (No. 200800011003).
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Wu, Cj., Li, Yp. & Wang, Zy. Study of the photonic crystal waveguide based on 2D compound lattice structure. Optoelectron. Lett. 5, 321–323 (2009). https://doi.org/10.1007/s11801-009-9061-3
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DOI: https://doi.org/10.1007/s11801-009-9061-3