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Full Three-Dimensional Subwavelength High-Q Surface-Plasmon-Polariton Cavity

Authors
Seo, Min-KyoKwon, Soon-HongEe, Ho-SeokPark, Hong-Gyu
Issue Date
12월-2009
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.9, no.12, pp.4078 - 4082
Indexed
SCIE
SCOPUS
Journal Title
NANO LETTERS
Volume
9
Number
12
Start Page
4078
End Page
4082
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/118861
DOI
10.1021/nl902274m
ISSN
1530-6984
Abstract
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.
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