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Whispering gallery mode emission from a composite system of CdTe nanocrystals and a spherical microcavity

Y P Rakovich et al 2003 Semicond. Sci. Technol. 18 914-918   doi: 10.1088/0268-1242/18/11/302  Help

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Y P Rakovich1, L Yang1, E M McCabe1, J F Donegan1, T Perova2, A Moore2, N Gaponik3 and A Rogach4
1 Semiconductor Photonics Group, Department of Physics, Trinity College, Dublin 2, Ireland
2 Department of Electronic and Electrical Engineering, Trinity College, Dublin, Ireland
3 Institute of Physical Chemistry, University of Hamburg, 20146 Hamburg, Germany
4 Photonics & Optoelectronics Group, Physics Department and CeNS, University of Munich, 80799 Munich, Germany
E-mail: Yury.Rakovich@tcd.ie

Abstract. We have studied the optical properties of a novel quantum dot–microcavity system consisting of CdTe nanocrystals attached to a melamine formaldehyde latex microsphere. The spheres were studied using conventional and confocal microscopy, the confocal system revealed defects in some spheres. The coupling between the emission of the nanocrystals and the spherical cavity modes was realized. Periodic very narrow peaks of the emission spectra corresponding to the whispering gallery modes were detected with strong emission into selected modes at a high pump intensity.

Print publication: Issue 11 (November 2003)
Received 10 March 2003, in final form 16 June 2003
Published 11 August 2003

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