Ultrasmall subwavelength nanorod plasmonic cavity

Ju Hyung Kang, You Shin No, Soon Hong Kwon, Hong Gyu Park

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We propose an ultrasmall plasmonic cavity consisting of a high-index/low-index dielectric nanorod covered with silver. Full three-dimensional subwavelength confinement of the surface-plasmon polaritons was achieved at the high-index dielectric-silver interface without propagating to the low-index dielectric-silver interface. The numerical simulations showed that the plasmonic mode excited in this cavity has a deep subwavelength mode volume of 0:0038(λ/2n)3 and a quality factor of 1500 at 40K, and consequently a large Purcell factor of ̃2 × 105. Therefore, this plasmonic cavity is expected to be useful for the demonstration of high-efficiency single photon sources or low-threshold lasers in an ultracompact nanophotonic circuit.

Original languageEnglish
Pages (from-to)2011-2013
Number of pages3
JournalOptics Letters
Issue number11
Publication statusPublished - 2011 Jun 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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