High-speed resonant detection via defect states in silicon disk resonators

This submission presents results on the frequency response of silicon resonant detectors, suitable for operation at wavelengths around 1550nm. The resonant structures are made sensitive to sub-bandgap light via the introduction of lattice defect states. An instability in operation is associated with the generation of free carriers within the resonant structure, producing a transient shift in the resonance wavelength. This manifests as a bit-pattern dependence for the detector, limiting the bandwidth of operation.