研究目的
To demonstrate a monolithic on-chip magneto-optical isolator with significantly improved insertion loss and isolation ratio, representing a critical step towards practical on-chip isolation in photonic integrated circuits (PICs).
研究成果
The demonstration of an on-chip isolator with a record low insertion loss of 3.0 dB and an isolation ratio of 40 dB represents a significant advancement in monolithic integrated optical isolators. The novel device architecture effectively eliminates parasitic optical losses and boosts waveguide nonreciprocity, constituting a critical step towards planar integration of optical isolation devices with large-scale photonic circuits.
研究不足
The narrow working bandwidth of the resonator-based isolator precludes their application with broadband tunable lasers. Additionally, the optical loss caused by absorption in the magneto-optical oxide films is higher than previously measured in polycrystalline Ce:YIG films, indicating room for further improvement.
