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

Y P Rakovich1, L Yang1, E M McCabe1, J F Donegan1, T Perova2, A Moore2, N Gaponik3 and A Rogach4

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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.


PACS

78.55.Et II-VI semiconductors

78.67.Hc Quantum dots

78.67.Bf Nanocrystals and nanoparticles

Subjects

Condensed matter: electrical, magnetic and optical

Semiconductors

Nanoscale science and low-D systems

Dates

Issue 11 (November 2003)

Received 10 March 2003, in final form 16 June 2003

Published 11 August 2003



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