Ultra-broadband silicon photonic polarization beam splitter with anisotropic subwavelength grating metamaterials

Abstract

We present an ultra-broadband polarization beam splitter using adiabatically tapered waveguides with anisotropic subwavelength grating metamaterials. The bandwidth of {BW}_{20{dB}}approx 200 nm was achieved numerically, which was confirmed experimentally for the spectral range between 1500-1640 nm.