Dual-microring-resonator interference sensor

Abstract

Dual-microring-resonator interference with the microrings on separate arms of a Mach–Zehnder interferometer is shown to provide the basis for high-performance sensors. The output spectrum, which depends on the overlap of the resonances of the two microring resonators, depends sensitively on the resonance shift of one of the microrings due to the presence of an analyte. The sensitivity and detection limit are obtained theoretically and found to be as large as 0.31 nm overlap resonance shift according to 2×10−6 refractive index units for Si-based sensors.

Development trends in silicon photonics

“…Zhou's group proposed a multi-resonance shift sensing theory, which introduced the Vernier calipers mechanism to the optical sensing [26] . Instead of conventional phase-induced sensing theory, a coupling-induced sensing mechanism was proposed.…”

Silicon-Based Stress-Coupled Optical Racetrack Resonators for Seismic Prospecting

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“…Owing to the advantage of the effective long interaction length provided by the resonance effects, microresonators have been shown to achieve a sufficient phase shift [7] and to be extremely sensitive [8], [9]. Therefore, microresonators have been widely studied for biosensing [10], chemical sensing [11], displacement [12], and vibration sensing [13], [14].…”

Highly Sensitive Athermal Optical Microring Sensor Based on Intensity Detection

“…Thus, none of them is suitable for athermal sensing application. A reference sensing scheme has been proposed based on dual MRs coupled to each arm of a Mach-Zehnder interferometer [4], [9]. There are two advantages of using this sensing scheme.…”

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