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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 7 — Mar. 29, 2010
  • pp: 7440–7455

Controlled modification of single colloidal CdSe/ZnS nanocrystal fluorescence through interactions with a gold surface

Céline Vion, Piernicola Spinicelli, Laurent Coolen, Catherine Schwob, Jean-Marc Frigerio, Jean-Pierre Hermier, and Agnés Maître  »View Author Affiliations

Optics Express, Vol. 18, Issue 7, pp. 7440-7455 (2010)

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Single colloidal CdSe/ZnS nanocrystals are deposited at various distances from a gold film in order to improve their performance as single-photon sources. Photon antibunching is demonstrated and the experimental curves are accurately fitted by theoretical equations. Emission lifetime and intensity are measured and found in excellent agreement with theoretical values. The various effects of a neighbouring gold film are discussed : interferences of the excitation beam, interferences of the fluorescence light, opening of plasmon and lossy-surface-wave modes, modification of the radiation pattern leading to a modified objective collection efficiency. At 80 nm from the gold film, when using an objective with 0.75 numerical aperture, about a 2.4-fold increase of the detected intensity is evidenced.

© 2010 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(270.5290) Quantum optics : Photon statistics

ToC Category:
Optics at Surfaces

Original Manuscript: January 28, 2010
Manuscript Accepted: March 16, 2010
Published: March 25, 2010

Virtual Issues
Vol. 5, Iss. 7 Virtual Journal for Biomedical Optics

Céline Vion, Piernicola Spinicelli, Laurent Coolen, Catherine Schwob, Jean-Marc Frigerio, Jean-Pierre Hermier, and Agnès Maître, "Controlled modification of single colloidal CdSe/ZnS nanocrystal fluorescence through interactions with a gold surface," Opt. Express 18, 7440-7455 (2010)

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