title: Full three-dimensional subwavelength high-Q surface-plasmon-polariton cavity.
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 shell. Numerical simulations show for a cavity <50 x 50 x 40 nm(3) (mode volume, V approximately 10(-5) microm(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.
authors.affiliation: Department of Physics, Korea University, Seoul 136-701, Korea.
authors.forename: Min-Kyo
authors.initials: MK
authors.lastname: Seo
authors.forename: Soon-Hong
authors.initials: SH
authors.lastname: Kwon
authors.forename: Ho-Seok
authors.initials: HS
authors.lastname: Ee
authors.forename: Hong-Gyu
authors.initials: HG
authors.lastname: Park
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D036103:Nanotechnology / Q000295:instrumentation*; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*