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Whispering gallery modes in photoluminescence and Raman spectra of a spherical microcavity with CdTe quantum dots: anti-Stokes emission and interference effects |
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| Authors: | Nikolai Gaponik Yury P Rakovich Matthias Gerlach John F Donegan Diana Savateeva Andrey L Rogach |
| Affiliation: | (1) Physical Chemistry/Electrochemistry, TU Dresden, 01062 Dresden, Germany;(2) Semiconductor Photonics Group, School of Physics, Trinity College, Dublin 2, Ireland;(3) Brest State Technical University, 224017 Brest, Belarus;(4) Department of Physics and CeNS, University of Munich, 80799 Munich, Germany |
| 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: | Microcavity Nanocrystals Quantum dots Raman spectroscopy Anti-Stokes emission |
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