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


Finlayson, C.E., Sazio, P.J.A., Sanchez-Martin, R., Bradley, M., Kelf, T. and Baumberg, J.J. (2006) Whispering gallery mode emission at telecommunications-window wavelengths using PbSe nanocrystals attached to photonic beads Semiconductor Science and Technology, 21, (3), L21-L24. (doi:10.1088/0268-1242/21/3/L01).

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Description/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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1088/0268-1242/21/3/L01
ISSNs: 0268-1242 (print)
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ePrint ID: 19152
Date :
Date Event
2006Published
Date Deposited: 16 Jan 2006
Last Modified: 16 Apr 2017 23:06
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/19152

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