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

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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 shelf. Numerical simulations show for a cavity <50 x 50 x 40 nm(3) (mode volume, V 10(-5) mu m(3)) 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.
Publisher
AMER CHEMICAL SOC
Issue Date
2009-12
Language
English
Article Type
Article
Keywords

OPTICAL MICROCAVITIES; WAVE-GUIDES

Citation

NANO LETTERS, v.9, no.12, pp.4078 - 4082

ISSN
1530-6984
DOI
10.1021/nl902274m
URI
http://hdl.handle.net/10203/99108
Appears in Collection
PH-Journal Papers(저널논문)
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