The annular Bragg resonator features a ring resonator using radial Bragg reflectors on both sides of a radial defect. This structure offers a solution to the realization of smaller resonators for two reasons. First, it allows to tailor the reflector structure to a desired radial field profile and to decouple between the modal volume and the radial losses. Second, it supports slow light propagation along the circumference of the defect. The spectral and spatial properties of the optical modes supported by the annular Bragg resonator structure are demonstrated through fabrication of high-index-contrast radial Bragg gratings in active semiconductor material.
|Published - May 2005