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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Dispersion engineering with leaky-mode resonant photonic lattices
Robert Magnusson1, Mehrdad Shokooh-Saremi, Xin Wang
1Department of Electrical Engineering, University of Texas at Arlington, USA. magnusson@uta.edu
Optics Express
|February 23, 2010
Summary
We designed leaky-mode resonance elements for slow-light applications, achieving significant time delays (~8 ps to ~30 ps) with flat dispersion. These devices are promising for optical buffering and switching.
Area of Science:
- Photonics and Optical Engineering
- Materials Science for Optical Devices
Background:
- Slow-light applications require optical elements with significant time delays and minimal dispersion.
- Leaky-mode resonance (LMR) elements offer a potential platform for achieving these properties.
Purpose of the Study:
- To investigate the dispersion properties of LMR elements for slow-light applications.
- To design and demonstrate LMR devices with large time delays and flat dispersion characteristics.
Main Methods:
- Utilized particle swarm optimization (PSO) for designing bandpass leaky-mode devices.
- Investigated single-layer silicon-on-insulator (SOI) LMR elements.
- Designed and analyzed cascaded double-membrane LMR elements.
Main Results:
- A single-layer SOI LMR element achieved a time-delay peak of approximately 8 ps.
- A double-membrane LMR element demonstrated an average delay of ~6 ps over a ~0.75 nm bandwidth with flat dispersion.
- Cascading five double-membrane elements resulted in an accumulative delay of ~30 ps over a ~0.5 nm bandwidth with very flat dispersion.
Conclusions:
- Leaky-mode resonance elements can be engineered to provide substantial time delays with remarkably flat dispersion.
- These LMR delay elements are suitable candidates for optical buffers, delay lines, and optical switches.
