Abstract

A six-channel wavelength-division multiplexing filter is proposed in this paper, based on a two-dimensional rods-in-air square-lattice photonic crystal (PhC) slab structure. The plane wave expansion method is applied to compute the band structure of the PhC. Three-dimensional finite-difference time-domain simulation methodology is used to measure and analyze the performance of the filter. Performances for both the 2D and 3D designs of the structure are analyzed. The analyses show that the device is capable of filtering six different wavelengths, i.e., 1310 nm, 1415 nm, 1455 nm, 1550 nm, 1725 nm, and 1770 nm. Owing to its linear optical operation, the device is able to operate at low power and also offers a high data rate in the range of $ \approx 0.9\,\,{\rm Tb/s} $ to $ \approx 4\,\,{\rm Tb/s} $. Moreover, the footprint area of the proposed device is on the order of $ {165}\,\,{{\unicode{x00B5}{\rm m}}^2} $, which is suitable for high-density integration of photonic circuits.

© 2019 Optical Society of America

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