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).
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.
|Subjects:||T Technology > TP Chemical technology
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > School of Electronics and Computer Science
University Structure - Pre August 2011 > Optoelectronics Research Centre
|Date Deposited:||16 Jan 2006|
|Last Modified:||25 Apr 2013 10:35|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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