Full three-dimensional subwavelength high-Q surface-plasmon-polariton cavity

Min Kyo Seo, Soon Hong Kwon, Ho Seok Ee, Hong Gyu Park

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


We propose a full three-dimensional subwavelength surface-plasmon-polariton cavity based on a metal-coated dielectric nanowire with an axial heterostructure. Surface plasmon-polaritons are strongly confined at the nanowire-metal interface sandwiched by an effective plasmonic mirror that consists of lower-index nanowire core and metal shell. Numerical simulations show for a cavity <50 × 50 x 40 nm3 (mode volume, V ∼ 10 5 μm3) that a quality factor, Q, >36000 is achieved at 20 K. This ultrasmall plasmonic cavity can be used as a plasmonic emitter or laser device coupled to a plasmonic waveguide with a high coupling efficiency in deep-subwavelength photonic systems.

Original languageEnglish
Pages (from-to)4078-4082
Number of pages5
JournalNano Letters
Issue number12
Publication statusPublished - 2009 Dec 9

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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