Induced-transparency in silicon-on-insulator based novel resonator systems

In the paper, Coupled-resonator-induced-transparency (CRIT) phenomenon in a novel integrated on-chip optical resonator system is experimentally demonstrated. The system is composed of a four-ring resonator with 20 μm diameter on silicon, whose spectrum has a narrow transparency peak with low group velocity. The CRIT effect is observed in the optical coupled-resonator due to the classical destructive interference. This system can be used to study the slow and fast light experiments because of its simplicity and flexibility. In this work, a CRIT resonance with a quality factor of 7.2×10⁴ is demonstrated with the same cavity size and the power coupling of the system is 60%, which agree well with the theoretical analysis. The through and drop transmission spectra of the resonator are coincided well with each other.