16-Channels wavelength efficient demultiplexing around 1.31/1.55 μm in 2D photonic crystal slab

Abstract

An original design of compact and efficient 16-channels demultiplexer integrated in a photonic crystals PhCs slab for dense wavelength demultiplexing near infrared application operating around two wavelengths 1.31 μm and 1.55 μm with an occupied area of 752.25 μm2 is proposed in this paper. The demultiplexer is based on a square lattice two-dimensional PhCs quasi square ring resonator (QSRR) for wavelength division multiplexing applications; it consists of two blocks where each one of theme is dedicated to function around one band of wavelengths 1.31 μm or 1.55 μm separated by a wideband demultiplexer. The demultiplexer is of good-quality factor Q that equals 517.6 for a spectral width of 3 nm and 622 for a spectral width 2.5 nm, low crosstalk values between -9 dB and-41 dB were observed in the same block. Furthermore, an extreme low crosstalk values between -27 dB and-288 dB were noted between two different blocks (1.31 μm and 1.55 μm), with high transmission efficiency of about 90%.