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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 11 — Nov. 1, 2011
  • pp: 2735–2739

Effects of surface oxidation on the linear optical properties of Cu nanoparticles

Ovidio Peña-Rodríguez and Umapada Pal  »View Author Affiliations


JOSA B, Vol. 28, Issue 11, pp. 2735-2739 (2011)
http://dx.doi.org/10.1364/JOSAB.28.002735


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Abstract

Applications of copper nanoparticles (NPs) are restricted due to their proneness to oxidation by ambient oxygen if not properly protected. Here we discuss the optical properties and application potential of copper NPs covered by a thin oxide layer. Considering Cu @ Cu 2 O core–shell type structures with different core size and shell thicknesses, linear optical properties of surface-oxidized copper NPs have been studied theoretically. Contrary to common perception, it has been demonstrated that surface-oxidized copper NPs have certain advantages for plasmonic applications. While the position of the surface plasmon resonance (SPR) can be fine-tuned by varying the thickness of the oxide layer, their plasmonic response can be enhanced (SPR intensity gain up to 30%) by adjusting the thickness of the oxide layer.

© 2011 Optical Society of America

OCIS Codes
(160.3900) Materials : Metals
(160.4760) Materials : Optical properties
(240.6680) Optics at surfaces : Surface plasmons
(160.4236) Materials : Nanomaterials
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Materials

History
Original Manuscript: June 17, 2011
Revised Manuscript: September 12, 2011
Manuscript Accepted: September 22, 2011
Published: October 24, 2011

Virtual Issues
Vol. 7, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Ovidio Peña-Rodríguez and Umapada Pal, "Effects of surface oxidation on the linear optical properties of Cu nanoparticles," J. Opt. Soc. Am. B 28, 2735-2739 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-11-2735


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