Fabrication and characterization of pillar-based photonic crystal waveguides

We present the fabrication and optical characterization of waveguides in photonic crystals\nbased on pillars. The waveguides were integrated in a classical photonic integrated\ncircuit in InP technology. Photonic crystal waveguides of varying lengths were fabricated\nand measured. From 2D band diagram simulations, two different defect radii were\nselected while keeping the background photonic crystal the same. The waveguide with\nthe larger defect radius (rdefect = 210 nm) shows lower coupling losses than the waveguide with rdefect = 170 nm. This is in agreement with simulations on the photonic crystal waveguides.