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 × 50 x 40 nm3 (mode volume, V ∼ 10 5 μm3) 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.
Original language | English |
---|---|
Pages (from-to) | 4078-4082 |
Number of pages | 5 |
Journal | Nano Letters |
Volume | 9 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2009 Dec 9 |
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanical Engineering