Passive wavelength tuning and multichannel photonic coupling using monolithically integrated vertical microresonators on ridge waveguides

The passive tuning of the resonant coupling wavelength in a SiNx vertical microring coupler (V mu RC) monolithically integrated on a ridge waveguide by engineering the structural parameters of the V mu RCs is experimentally demonstrated and theoretically verified. Multi-channel photonic coupling is achieved by integrating two different V mu RCs on a single ridge waveguide. This work represents a critical step to 3D photonic integration using V mu RCs. Published by AIP Publishing.