Hybrid Si/GaN microring resonator integrated with Si electrodes for electro-optic tuning

We report here the hybrid Si/GaN microring resonator structure integrated with Si electrodes. Preliminary results on electro-optic tuning of the guided-mode resonance was in the range of 22 pm for the entire applied voltage range of -60 V to 80 V. Up to 9 dB change in the transmission was observed at the maximum applied voltage. The device might be useful for static wavelength-selectable notch filtering of on-chip guided optical signal.