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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. 26, Iss. 12 — Dec. 1, 2009
  • pp: B21–B27

Enhancement of Er 3 + upconverted luminescence in Er 3 + : Au-antimony glass dichroic nanocomposites containing hexagonal Au nanoparticles

Tirtha Som and Basudeb Karmakar  »View Author Affiliations


JOSA B, Vol. 26, Issue 12, pp. B21-B27 (2009)
http://dx.doi.org/10.1364/JOSAB.26.000B21


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Abstract

Dichroic Er 3 + :Au-antimony glass nanocomposites are synthesized in a new reducing glass (dielectric) matrix (mol%) K 2 O B 2 O 3 Sb 2 O 3 (KBS) by a single-step melt-quench technique involving selective thermochemical reduction principle. Transmission electron microscopic images reveal hexagonal Au o nanoparticles having major axes about 9 23 nm . Dichroic behavior arises due to hexagonal Au o nanoparticles of aspect ratio 1.2–1.3. Au o nanoparticles of concentration of 0.03 wt % ( 4.1 × 10 18   atoms cm 3 ) drastically enhances the intensity (2–5 folds) of both 536 ( S 3 2 4 I 15 2 4 , green) and 645 ( F 9 2 4 I 15 2 4 , red) nm emission bands of Er 3 + . Local field enhancement induced by Au o surface plasmon resonance (SPR) and energy transfer from fluorescent Au o Er 3 + ions are found to be responsible for enhancement while, at very high Au concentration, energy transfer from Er 3 + Au o and optical reabsorption due to Au o SPR result in quenching.

© 2009 Optical Society of America

OCIS Codes
(160.5690) Materials : Rare-earth-doped materials
(250.5230) Optoelectronics : Photoluminescence
(250.5403) Optoelectronics : Plasmonics

History
Original Manuscript: March 20, 2009
Manuscript Accepted: May 20, 2009
Published: June 23, 2009

Citation
Tirtha Som and Basudeb Karmakar, "Enhancement of Er3+ upconverted luminescence in Er3+: Au-antimony glass dichroic nanocomposites containing hexagonal Au nanoparticles," J. Opt. Soc. Am. B 26, B21-B27 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-12-B21

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