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Updated: Dec 25, 2025
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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Strong coupling between distant photonic nanocavities via dark whispering gallery modes
Optics Express
|April 1, 2020
Summary
Strong coupling between distant photonic crystal cavities is achieved using a microring resonator. This overcomes evanescent field limitations, enabling scalable photonic integrated circuits.
Area of Science:
- Photonics
- Integrated Optics
- Nanophotonics
Background:
- Strong coupling of photonic nanocavities is crucial for photonic integrated circuits.
- Evanescent field coupling limits nanocavity distance and circuit scalability.
Purpose of the Study:
- To propose and demonstrate a scheme for strong coupling between distant nanocavities, overcoming evanescent field limitations.
- To enable scalable photonic integrated circuits through long-range coupling.
Main Methods:
- Utilizing two distant one-dimensional photonic crystal cavities (1DPhCCs) bridged by a microring resonator supporting whispering gallery modes (WGMs).
- Investigating strong coupling conditions even when the microring is largely detuned from the 1DPhCCs.
Main Results:
- Demonstrated strong coupling between 1DPhCCs separated by over 8 µm.
- Observed formation of supermodes between 1DPhCCs with suppressed WGM proportion in the microring at large detuning.
- Showcased energy oscillation primarily between the two 1DPhCCs, with the WGM acting as a dark mode.
Conclusions:
- The proposed scheme enables strong coupling of distant nanocavities with experimental feasibility.
- This approach offers significant advantages for the development of next-generation photonic circuits.
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