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Optical bistable devices based on guided-mode resonance in slab waveguide gratings
Quang Minh Ngo1, Sangin Kim, Seok Ho Song
1School of Electrical and Computer Engineering, Ajou University, Suwon 443-749, Korea.
Optics Express
|January 7, 2010
Summary
Nonlinear resonant gratings exhibit optical bistability, showing significant field enhancements. These gratings offer a promising platform for all-optical information processing and optical switching applications.
Area of Science:
- Photonics and optical engineering
- Nonlinear optics
- Materials science
Background:
- Optical bistability is crucial for all-optical information processing.
- Resonant gratings offer potential for enhanced light-matter interactions.
Purpose of the Study:
- To investigate the optical bistability properties of nonlinear resonant gratings.
- To analyze the influence of quality factor on device performance.
- To explore mechanically controllable switching in coupled gratings.
Main Methods:
- Design of slab waveguide gratings with varying quality factors.
- Analysis using the finite-difference time-domain (FDTD) method.
- Investigation of coupled gratings and gap distance control.
Main Results:
- Observed considerable field enhancements within the gratings.
- Demonstrated favorable performance compared to metallic bistable devices.
- Showcased mechanically controllable switching intensity by adjusting gap distance.
Conclusions:
- Nonlinear resonant gratings are effective for optical bistability.
- Device performance is tunable via quality factor, guiding future designs.
- Potential applications in all-optical information processing and optical switching are highlighted.
