Simulation, fabrication, and initial characterization of two hybrid double ring resonator architecture

Abstract

We report the simulation, fabrication, and initial characterization of a hybrid double photonic microring resonator that combines one cross-coupling and one direct-coupling mechanism. Cross-coupling mechanism involves the physical interconnection of some ports, while in the direct-coupling mechanism, interconnection ports are evanescently coupled across a gap. We simulated the two hybrid architectures using Ansys Lumerical MODE, a leading-edge software for designing and analyzing integrated and fiber-optic devices. The resonators were fabricated at the Nanophotonic Technology Center in the Polytechnic University of Valencia, Spain, using state-of-the-art electron-beam lithography techniques. We performed preliminary characterization and observed both Coupled Resonator Induced Transparency (CRIT)-like effect. This work sets the stage for future experimental validation and potential applications in optical communication and quantum computing systems.