FDTD microcavity simulations: Design and experimental realization of waveguide-coupled single-mode ring and whispering-gallery-mode disk resonators

S. C. Hagness*, D. Rafizadeh, S. T. Ho, A. Taflove

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

244 Scopus citations

Abstract

We investigate the properties of high-Q, wide free-spectral-range semiconductor microcavity ring and disk resonators coupled to submicron-width waveguides. Key optical design parameters are characterized using finite-difference time-domain (FDTD) solutions of the full-wave Maxwell's equations. We report coupling efficiencies and resonant frequencies that include the effects of waveguide dispersion and bending and scattering losses. For diameters of 5 μm, the microcavity resonators can have Q's in the several thousands and a free spectral range of 6 THz (50 nm) in the 1.55 μm, wavelength range. Studies of the transmittance characteristics illustrate the transition from single-mode resonances to whispering-gallery-mode resonances as the waveguide width of the microring is increased to form a solid microdisk. We present nanofabrication results and experimentally measured transmission resonances of AlGaAs/GaAs microcavity resonators designed in part with this method.

Original languageEnglish (US)
Pages (from-to)2154-2165
Number of pages12
JournalJournal of Lightwave Technology
Volume15
Issue number11
DOIs
StatePublished - Nov 1997

Keywords

  • FDTD methods
  • Integrated optics
  • Microresonators
  • Numerical analysis
  • Optical device fabrication

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'FDTD microcavity simulations: Design and experimental realization of waveguide-coupled single-mode ring and whispering-gallery-mode disk resonators'. Together they form a unique fingerprint.

Cite this