Open Access

Whispering gallery modes in photoluminescence and Raman spectra of a spherical microcavity with CdTe quantum dots: anti-Stokes emission and interference effects

  • Nikolai Gaponik1,
  • Yury P. Rakovich2Email author,
  • Matthias Gerlach2,
  • John F. Donegan2,
  • Diana Savateeva3 and
  • Andrey L. Rogach4
Nanoscale Research Letters20061:68

https://doi.org/10.1007/s11671-006-9005-9

Published: 25 July 2006

Abstract

We have studied the photoluminescence and Raman spectra of a system consisting of a polystyrene latex microsphere coated by CdTe colloidal quantum dots. The cavity-induced enhancement of the Raman scattering allows the observation of Raman spectra from only a monolayer of CdTe quantum dots. Periodic structure with very narrow peaks in the photoluminescence spectra of a single microsphere was detected both in the Stokes and anti-Stokes spectral regions, arising from the coupling between the emission of quantum dots and spherical cavity modes.

Keywords

MicrocavityNanocrystalsQuantum dotsRaman spectroscopyAnti-Stokes emission

[118]

Declarations

Acknowledgments

This work was supported by Science Foundation Ireland (SFI) under grant number 02/IN.1/I47. ALR acknowledges the Walton Award from the SFI.

Authors’ Affiliations

(1)
Physical Chemistry/Electrochemistry, TU Dresden, Dresden, Germany
(2)
Semiconductor Photonics Group, School of Physics, Trinity College, Dublin 2, Ireland
(3)
Brest State Technical University, Brest, Belarus
(4)
Department of Physics and CeNS, University of Munich, Munich, Germany

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Copyright

© to the authors 2006

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