Perfect coupling of light to a periodic dielectric/metal/dielectric structure

Zhengling Wang*, Shiqiang Li, R. P.H. Chang, John B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Using the finite difference time domain method, it is demonstrated that perfect coupling can be achieved between normally incident light and a periodic dielectric/metal/dielectric structure. The structure serves as a diffraction grating that excites modes related to the long range surface plasmon and short range surface plasmon modes that propagate on continuous metallic films. By optimizing the structural dimensions, perfect coupling is achieved between the incident light and these modes. A high Q of 697 and an accompanying ultrasharp linewidth of 0.8 nm are predicted for a 10 nm silver film for optimal conditions.

Original languageEnglish (US)
Article number033103
JournalJournal of Applied Physics
Issue number3
StatePublished - Jul 21 2014

ASJC Scopus subject areas

  • General Physics and Astronomy


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