Bistability phenomena based on frequency-sensitive self-collimation in nonlinear photonic crystals
Abstract
By introducing the change of beam behavior near the frequency sensitive self-collimation point, a new kind of bistability is observed in a finite nonlinear photonic crystal (PhC). The mechanism of such a PhC bistability is from the complex interplay between cavity resonance, nonlinearity and beam behavior. Additionally, it has unique properties, including: high frequency sensitivity, small volume, short switching time, robustness and position flexibility. With the consideration of beam behavior, a new theory based on the coupled-mode equation has been constructed, whose result agrees with the numerical one very well. The new PhC bistability could be widely used to design various optical devices, as a bistable all-optical switch has also been demonstrated.
- Publication:
-
Journal of Optics
- Pub Date:
- April 2020
- DOI:
- 10.1088/2040-8986/ab76a8
- Bibcode:
- 2020JOpt...22d5801Z
- Keywords:
-
- photonic crystals;
- bistability;
- nonlinear optics;
- self-collimation;
- switching