Ultra compact optical link made in amorphous silicon waveguide

This paper reports about the design, fabrication and experimental passive compact building blocks (μbend of 2 μm radius, Y junction and Multi Mode Interference (MMI) splitter of 2 μm wide and 4.2 μm long) in a amorphous hydrogenated silicon (a-Si:H) based strip waveguide. The cross section of the waveguide is about 0.5 μm wide and 0.2 μm high.