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Updated: Dec 14, 2025
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
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Transmission properties of periodically sparse patterned microring resonators.
Optics Express
|July 19, 2020
Summary
Researchers analyzed optical properties of patterned microring resonators. Stationary modes in these resonators cause total reflection, while traveling modes can extend free spectral range, offering new possibilities for optical device design.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- Microring resonators are crucial components in integrated photonics.
- Understanding their optical properties is key for advanced device applications.
- Periodically sparse patterning offers novel ways to control light propagation.
Purpose of the Study:
- To theoretically investigate the optical properties and dispersion relation of periodically sparse patterned microring resonators.
- To identify and differentiate the supported optical modes.
- To analyze the reflectivity and transmission characteristics in a resonator-waveguide system.
Main Methods:
- Utilizing the transfer matrix method for theoretical analysis.
- Deriving the dispersion relation for the patterned microring.
- Employing the finite-difference time-domain (FDTD) method for numerical validation.
Main Results:
- Two distinct optical modes were identified: traveling modes and stationary modes.
- Stationary modes were found to be responsible for total reflection in the resonator-waveguide system.
- Traveling modes exhibit non-reflective behavior, enabling free spectral range extension.
Conclusions:
- The study elucidates the distinct roles of stationary and traveling modes in patterned microring resonators.
- Stationary modes are critical for achieving high-reflectivity optical components.
- Traveling modes offer a pathway for enhancing the performance of optical systems by extending the free spectral range.
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