Silicon nitride (SiN) has emerged as a promising platform for the development of photonic integrated circuits (PICs) covering a wide range of application areas from the visible to the infrared regime. Optical microcavity has evolved to be a highly versatile component in PICs, enabling the development of various disciplines, including lasers, filters, sensors, tele/data communication, and quantum technologies. SiN microring resonators are particularly compatible with already established micro or nanofabrication protocols and display useful properties, such as ultra-compactness, low loss, and planar nature. In this work, we have demonstrated the hybrid nanophotonic chip modeling, nanofabrication, two-dimensional semiconductor (TMDC) integration, and chip testing of high-Q ultra-compact SiN microring resonators supporting the Terahertz (THz) free spectral range (FSR) cavity modes at the visible wavelength. Counterpart, the monolithic integration of solid-state color centers with photonic elements of the same material is a promising approach to overcome the constraints of fabrication complexity and coupling losses in traditional hybrid integration approaches. We have engineered a novel
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