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

被引：60

作者：

Seo, Min-Kyo ^{[1
]}

Kwon, Soon-Hong ^{[1
]}

Ee, Ho-Seok ^{[1
]}

Park, Hong-Gyu ^{[1
]}

机构：

[1] Korea Univ, Dept Phys, Seoul 136701, South Korea

来源：

NANO LETTERS | 2009年 / 9卷 / 12期

关键词：

OPTICAL MICROCAVITIES; WAVE-GUIDES;

D O I：

10.1021/nl902274m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：4078 / 4082

页数：5

共 29 条

[1]

[Anonymous], 1995, Computational Electrodynamics: The Finite-Difference TimeDomain Method

[2] Label-free, single-molecule detection with optical microcavities [J].