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Updated: May 18, 2026
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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
A fully integrated high-Q Whispering-Gallery Wedge Resonator
Fernando Ramiro-Manzano1, Nikola Prtljaga, Lorenzo Pavesi
1Nanoscience Laboratory, Dept Physics, University of Trento, Via Sommarive 14, I-38123 Trento, Italy.
Optics Express
|October 6, 2012
Summary
We demonstrate a novel monolithic integration of wedge-resonator and waveguide systems on a silicon chip. This breakthrough enables scalable integration of ultra-high-quality factor (Q) devices into planar lightwave circuits.
Area of Science:
- Photonics and Optical Engineering
- Materials Science and Engineering
- Semiconductor Device Physics
Background:
- Ultra-high quality factor (Q) microresonators are crucial for advanced optical applications.
- Existing planar resonators face challenges in integrating with lightwave circuits.
- Previous wedge-resonator designs struggled with full integration with waveguides.
Purpose of the Study:
- To achieve full monolithic integration of a wedge-resonator and waveguide system on a silicon chip.
- To enable arbitrary coupling strength engineering between the resonator and waveguide.
- To establish a robust platform for industrial-scale integration of ultra-high-Q devices.
Main Methods:
- Development of a vertically-coupled system where the cavity and waveguide are in different planes.
- Utilizing shallow-angle wedge design to maintain waveguide integrity.
- Leveraging silicon chip technology for monolithic integration.
Main Results:
- Successfully demonstrated full monolithic integration of a wedge-resonator/waveguide system.
- Achieved precise size-control and robustness against post-processing.
- Enabled arbitrary coupling strength engineering between vertically-aligned components.
Conclusions:
- The developed vertically-coupled system offers a promising solution for integrating ultra-high-Q microresonators into planar lightwave circuits.
- This monolithic approach facilitates industrial-scale manufacturing and application of advanced photonic devices.
- The precise control and robustness pave the way for next-generation optical communication and sensing technologies.
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