Negative refractive index in coaxial plasmon waveguides
Optics Express, Vol. 18, Issue 12, pp. 12770-12778 (2010)
http://dx.doi.org/10.1364/OE.18.012770
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Abstract
We theoretically show that coaxial waveguides composed of a metallic core, surrounded by a dielectric cylinder and clad by a metal outer layer exhibit negative refractive index modes over a broad spectral range in the visible. For narrow dielectric gaps (10 nm GaP embedded in Ag) a figure-of-merit of 18 can be achieved at λ0 = 460 nm. For larger dielectric gaps the negative index spectral range extends well below the surface plasmon resonance frequency. By fine-tuning the coaxial geometry the special case of n = −1 at a figure-of-merit of 5, or n = 0 for a decay length of 500 nm can be achieved.
© 2010 Optical Society of America
OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(240.6680) Optics at surfaces : Surface plasmons
(160.3918) Materials : Metamaterials
ToC Category:
Optics at Surfaces
History
Original Manuscript: April 12, 2010
Manuscript Accepted: May 14, 2010
Published: May 28, 2010
Citation
René de Waele, Stanley P. Burgos, Harry A. Atwater, and Albert Polman, "Negative refractive index in coaxial plasmon waveguides," Opt. Express 18, 12770-12778 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-12-12770
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