Engineering of metal-clad optical nanocavity to optimize coupling with integrated waveguides

Myung Ki Kim, Zheng Li, Kun Huang, Ryan Going, Ming C. Wu, Hyuck Choo

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


We propose a cladding engineering method that flexibly modifies the radiation patterns and rates of metal-clad nanoscale optical cavity. Optimally adjusting the cladding symmetry of the metal-clad nanoscale optical cavity modifies the modal symmetry and produces highly directional radiation that leads to 90% coupling efficiency into an integrated waveguide. In addition, the radiation rate of the cavity mode can be matched to its absorption rate by adjusting the thickness of the bottomcladding layer. This approach optimizes the energy-flow rate from the waveguide and maximizes the energy confined inside the nanoscale optical cavity.

Original languageEnglish
Pages (from-to)25796-25804
Number of pages9
JournalOptics Express
Issue number22
Publication statusPublished - 2013 Nov 4
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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