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Whispering gallery mode emission at telecommunications-window wavelengths using PbSe nanocrystals attached to photonic beads

By C.E. Finlayson, P.J.A. Sazio, R. Sanchez-Martin, M. Bradley, T. Kelf and J.J. Baumberg

Abstract

We report the selective chemical attachment of infrared emitting PbSe nanocrystal quantum dots onto micron-scale glass photonic beads. Upon optical excitation, photoluminescence from the shell of nanocrystals is seen to couple into the high-Q 'whispering gallery' modes of the bead via the evanescent optical field, resulting in a series of sharp peaks being observed at wavelengths of around 1550 nm. Theoretical modelling gives a close agreement with the data for angular modes corresponding to l ~ 120. This work demonstrates the potential of narrow-bandgap II–VI semiconductor nanocrystals for use in a wide range of telecommunications-window photonics applications

Topics: TP, TK, QC
Year: 2006
OAI identifier: oai:eprints.soton.ac.uk:19152
Provided by: e-Prints Soton
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