Suspended polarization beam splitter on silicon-on-insulator

Published in Optical Society of America, 2018

Polarization handling in suspended silicon photonics has the potential to enable new applications in fields such as optomechanics, photonic microelectromechanical systems, and mid-infrared photonics. In this work, we experimentally demonstrate a suspended polarization beam splitter on a silicon-on-insulator waveguide platform, based on an asymmetric directional coupler. Our device presents polarization extinction ratios above 10 and 15 dB, and insertion losses below 5 and 1 dB, for TM and TE polarized input, respectively, across a 40 nm wavelength range at 1550 nm, with a device length below 8 µm. These results make our suspended polarization beam splitter a promising building block for future systems based on polarization diversity suspended photonics.

Citation: Errando-Herranz, C., Das, S. and Gylfason, K.B., 2018. Suspended polarization beam splitter on silicon-on-insulator. Optics Express, 26(3), pp.2675-2681.   Paper