“…Coupling of SiON/SiO 2 waveguides to an ion implanted pin silicon photodiode has provided detector efficiencies of up to 88%, depending on the detector type and the type of anti-reflection coatings employed [60,61]. Alternatively, III±V-based detectors can be hybridly coupled to a Si waveguide; structures featuring SiO 2 waveguides and etched angle mirrors [62] and passive alignment features [63] have been demonstrated.…”