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Updated: Jul 30, 2025
10:26
Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
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Electrically tuned coupling of lithium niobate microresonators
Optics Letters
|May 15, 2023
Summary
This study presents a tunable racetrack resonator on lithium niobate (LN) for precise light control. The device offers wide-range coupling modulation and stable resonance, ideal for integrated photonics.
Area of Science:
- Integrated photonics
- Nonlinear optics
- Materials science
Background:
- Microresonators offer stable operation but lack tunable coupling.
- Achieving optimal coupling states is crucial for device performance.
Purpose of the Study:
- To demonstrate a racetrack resonator with electrically modulated coupling.
- To enable wide-range coupling regulation and stable resonance frequency.
Main Methods:
- Utilizing an X-cut lithium niobate (LN) platform.
- Integrating a Mach-Zehnder interferometer (MZI) with balanced directional couplers (DCs).
- Achieving light exchange via controlled coupling.
Main Results:
- Demonstrated wide-range coupling control (under- to over-coupling).
- Achieved a fixed resonance frequency at a 3 dB DC splitting ratio.
- Measured a high extinction ratio (>23 dB) and low Vπ·L (0.77 V·cm).
Conclusions:
- The tunable LN racetrack resonator offers precise coupling control.
- Stable resonance frequency and CMOS compatibility make it suitable for advanced applications.
- Expected to advance nonlinear optical devices on integrated platforms.
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