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  • Nano Express
  • Open Access

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

  • 1,
  • 2Email author,
  • 2,
  • 2,
  • 3 and
  • 4
Nanoscale Research Letters20061:68

  • Published:


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.


  • Microcavity
  • Nanocrystals
  • Quantum dots
  • Raman spectroscopy
  • Anti-Stokes emission




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

Physical Chemistry/Electrochemistry, TU Dresden, 01062 Dresden, Germany
Semiconductor Photonics Group, School of Physics, Trinity College, Dublin 2, Ireland
Brest State Technical University, 224017 Brest, Belarus
Department of Physics and CeNS, University of Munich, 80799 Munich, Germany


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