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Conjugated topological interface-states in coupled ring resonators
Yu-Chuan Lin1,2, Bo-Yu Chen1, Wen-Jeng Hsueh3
1Photonics Group, Department of Engineering Science and Ocean Engineering, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei, 10660, Taiwan.
Scientific Reports
|June 9, 2021
Summary
Researchers introduce topological interface-states in topological series coupled ring resonators for robust optical transmission. This novel approach achieves ultra-high-Q and complete transmission, overcoming limitations in traditional photonic systems.
Area of Science:
- Topological Photonics
- Resonator Optics
- Condensed Matter Physics
Background:
- Topological photonics offers robust unidirectional transmission immune to scattering.
- Research on topological series coupled ring resonators (T-SCRR) remains limited.
- Conventional photonic systems face transmission loss with increasing resonator quality (Q).
Purpose of the Study:
- To investigate and describe topological interface-states (TIS) in T-SCRR for the first time.
- To develop an approach for achieving TIS in dielectric binary ring resonators.
- To enhance optical transmission properties in high-Q resonator systems.
Main Methods:
- Analysis of the band structure of dielectric binary ring resonators.
- Calculation of the Zak phase for each bandgap.
- Development of conjugated topological series coupled ring resonators.
Main Results:
- Demonstrated the existence of TIS in T-SCRR.
- Achieved ultra-high-Q with complete transmission via conjugated TIS.
- Significantly improved transmission loss issues associated with high-Q in traditional systems.
Conclusions:
- Conjugated T-SCRR offer a novel pathway for enhanced optical performance.
- The findings pave the way for advanced photonic devices.
- Potential applications include high-Q filters, optical sensors, switches, resonators, communications, and quantum information processors.
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