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Atomically thin 2D materials provide a wide range of basic building blockswith unique properties, making them ideal for heterogeneous integration with amature chip platform. An understanding the role of excitons in transition metaldichalcogenides in Silicon photonic platform is a prerequisite for advances inoptical communication technology, signal processing, and possibly computing.Here we demonstrate passive tunable coupling by integrating few layers of MoTe2on a micro-ring resonator. We find a TMD-to-rings circumference coverage lengthratio to place the ring into critical coupling to be about 10% as determinedfrom the variation of spectral resonance visibility and loss as a function ofTMD coverage. Using this TMD ring heterostructure, we further demonstrate asemi-empirical method to determine the index of an unknown TMD material (nMoTe2of 4.36+.011i) near for telecommunication-relevant wavelength.

Microring Resonators Coupling Tunability by Heterogeneous 2D Material Integration