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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 23 — Dec. 1, 2010
  • pp: 4024–4026

Longitudinal optical phonon–plasmon coupling in luminescent 3C–SiC nanocrystal films

L. Z. Liu, J. Wang, X. L. Wu, T. H. Li, and Paul K. Chu  »View Author Affiliations


Optics Letters, Vol. 35, Issue 23, pp. 4024-4026 (2010)
http://dx.doi.org/10.1364/OL.35.004024


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Abstract

Glycerol-passivated 3C–SiC nanocrystal (NC) solid films with tunable blue photoluminescence show abnormal longitudinal optical (LO) phonon behavior. As the NC size increases, the LO phonon intensity increases in the Raman spectra of the solid films and is even larger than that of the transverse optical mode. The Raman spectra cannot be fitted by using only the phonon confinement model. When further considering the coupling between the LO phonon and plasmon induced by the surface deformation potential in the glycerol layer, good agreement is achieved between the experiments and theory. This indicates that the coupled LO phonon–plasmon effect arising from the surface bonding structure plays a crucial role in the modified LO phonon behavior.

© 2010 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(290.5860) Scattering : Scattering, Raman

ToC Category:
Materials

History
Original Manuscript: October 13, 2010
Revised Manuscript: November 7, 2010
Manuscript Accepted: November 7, 2010
Published: November 24, 2010

Citation
L. Z. Liu, J. Wang, X. L. Wu, T. H. Li, and Paul K. Chu, "Longitudinal optical phonon–plasmon coupling in luminescent 3C–SiC nanocrystal films," Opt. Lett. 35, 4024-4026 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-23-4024


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