Title :
Laterally coupled hexagonal micropillar resonator add-drop filters in silicon nitride
Author :
Ma, Ning ; Li, Chao ; Poon, Andrew W.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China
Abstract :
We report the first laterally coupled hexagonal micropillar resonator add-drop filters in silicon nitride. Our experiment reveals waveguide-coupled resonances of six-bounce ray orbits in the hexagonal microcavity. By tuning the submicrometer waveguide width, we demonstrate simultaneous optimization of the coupling efficiency and the resonance Q value. We attribute the optimum waveguide width to the near k-vector matching between the input- and output-coupled waveguide fundamental mode and the cavity six-bounce modes that are coherently coupled along the resonator flat sidewalls.
Keywords :
integrated optics; microcavities; optical communication equipment; optical couplers; optical filters; optical resonators; optical tuning; optical waveguides; optimisation; silicon compounds; wavelength division multiplexing; SiN; add-drop filters; cavity six-bounce modes; coherent coupling; coupling efficiency optimization; fundamental mode; hexagonal microcavity; hexagonal micropillar resonator filters; input-coupled waveguide; integrated photonic circuits; laterally coupled filters; near k-vector matching; output-coupled waveguide; resonance Q value; resonator flat sidewalls; silicon nitride; six-bounce ray orbits; submicrometer waveguide width tuning; waveguide-coupled resonances; wavelength division multiplexing; Air gaps; Councils; Coupling circuits; Electromagnetic scattering; Microcavities; Orbits; Particle scattering; Resonance; Resonator filters; Silicon;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.835200
