Two-dimensional optical ring resonators based on radial Bragg resonance.
A Bragg-reflection-based ring resonator is proposed and analyzed. Closed-form expressions for the field and dispersion curves for radial Bragg gratings and photonic bandgap crystals are derived. The required gratings exhibit a chirped period and a varying index profile. Small bending radii and strong control over the resonator dispersion are possible by the Bragg confinement. Large free spectral range and low radiation loss are predicted theoretically.
Scheuer
Jacob
J
Department of Applied Physics, 128-95 California Institute of Technology, Pasadena, California 91125, USA. koby@caltech.edu
Yariv
Amnon
A