Abstract
In this paper, photonic bandgap (PBG) induced wave guiding application of photonic crystals is exploited to design Dual Band Wavelength Demultiplexer (DBWD) for separating two telecommunication wavelengths, 1.31 and 1.55 μm. Two designs that use silicon rods in air and embedded air holes in silicon are realized for this purpose. Plane wave expansion (PWE) method and two dimension Finite Difference Time Domain (FDTD) methods are used to design and analyze the DBWD in Y type photonic crystal structure. Numerical analysis indicates that these designs enable the separation of two wavelengths with very high optical power extinction ratios. Other filter parameters like transmittance and quality factor are also calculated to confirm superior performance of the proposed design of photonic crystal based DBWD.
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Sinha, R.K., Rawal, S. Modeling and design of 2D photonic crystal based Y type dual band wavelength demultiplexer. Opt Quant Electron 40, 603–613 (2008). https://doi.org/10.1007/s11082-008-9248-z
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DOI: https://doi.org/10.1007/s11082-008-9248-z