1. THz Technical Research Center of Shenzhen University, Shenzhen 518067, P.R. China;2. Shenzhen Key Laboratory of Micro‐Nano Photonic Information Technology, Shenzhen 518067, P.R. China;3. College of Electronic Science and Technology, Shenzhen University, Shenzhen 518067, P.R. China
Abstract:
A resonance splitting effect is investigated in a system composed of two cavities coupled by two unidirectional waveguides. Both theoretical analysis and numerical calculations demonstrate that the resonance splitting (indicating a coupling between the cavities) is independent of the phase shift between the cavities, which is in contrast to previous research where reciprocal waveguides are used. Moreover, this splitting can be tunable by an external magnetic field. Our findings offer a possibility to realize effective coupling between remote on‐chip resonators, which is highly demanded in the next‐generation photonic circuits.
