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Growth and optical properties of CdTe quantum dots in ZnTe nanowires

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9 Author(s)
Wojnar, Piotr ; Institute of Physics, Polish Academy of Sciences, Al Lotników 32/46, 02-668 Warsaw, Poland ; Janik, Elz bieta ; Baczewski, Lech T. ; Kret, Sławomir
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We report on the formation of optically active CdTe quantum dots in ZnTe nanowires. The CdTe/ZnTe nanostructures have been grown by a gold nanocatalyst assisted molecular beam epitaxy in a vapor-liquid solid growth process. The presence of CdTe insertions in ZnTe nanowire results in the appearance of a strong photoluminescence band in the 2.0 eV–2.25 eV energy range. Spatially resolved photoluminescence measurements reveal that this broad emission consists of several sharp lines with the spectral width of about 2 meV. The large degree of linear polarization of these individual emission lines confirms their nanowire origin, whereas the zero-dimensional confinement is proved by photon correlation spectroscopy.

Published in:

Applied Physics Letters  (Volume:99 ,  Issue: 11 )

Date of Publication:

Sep 2011

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