Design of a novel integrated polarization beam splitter

We propose an integrated polarization beam splitter based on a twodimensional photonic crystal of polymer cylinders in air, with a TE bandgap centered on a wavelength of λ=780nm. The novel design is tailored for two-photon absorption 3D laser direct writing in a polymeric photoresist. Using this fabrication method, we can obtain spatial features as small as 200 nm. Processing time can be as low as 15 minutes for a 300x300 μm processed area and an overall cost of ∼15 eur. The device is comprised of a series of components such as linear waveguides, parabolic tapered waveguides and multimode interference couplers, in order to lower optical losses. In this paper, design steps and simulation results are presented and discussed. Experimental results supporting the chosen fabrication method and materials are presented and discussed in the form of a parametric study. © 2018 Politechnica University of Bucharest. All rights reserved.