Citation:
Alex Naiman, Stern, Liron , and Levy, Uriel . 2018. “On-Chip Beam Positioning Sensor Via Frequency Locked Cascaded Ring Resonators”. Applied Physics Letters. doi:10.1063/1.5029999.
Abstract:
We demonstrate an approach for on-chip beam positioning with a position accuracy of up to 100 nm. This approach is based on tracking the resonance of two adjacent microring resonators that are implemented on a silicon on insulator chip. We demonstrate the functionality of our approach by illuminating the chip through a Near Field Scanning Optical Microscope tip and monitoring the shift of the microring resonances due to the thermo-optic effect. We also discuss the contribution of different effects such as free carrier absorption and dispersion to the resonance shift.