Ultrasmall subwavelength nanorod plasmonic cavity
- Authors
- Kang, Ju-Hyung; No, You-Shin; Kwon, Soon-Hong; Park, Hong-Gyu
- Issue Date
- 1-6월-2011
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS LETTERS, v.36, no.11, pp.2011 - 2013
- Indexed
- SCIE
SCOPUS
- Journal Title
- OPTICS LETTERS
- Volume
- 36
- Number
- 11
- Start Page
- 2011
- End Page
- 2013
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112251
- DOI
- 10.1364/OL.36.002011
- ISSN
- 0146-9592
- Abstract
- 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(lambda/2n)(3) and a quality factor of 1500 at 40K, and consequently a large Purcell factor of similar to 2 x 10(5). 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. (C) 2011 Optical Society of America
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