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PL spectra taken at nanocolumns at (a) and at (b) RT under macroscopic photoexcitation. The internal quantum efficiency of integrated PL intensity is 12% at RT.
(Color) Fluorescent microimage taken at nanocolumns at RT under photoexcitation of the line from a Hg lamp.
PL decay curves of the emission band taken at (a) nanocolumns and (b) an SQW film at .
PL spectra taken at a single nanocolumn at under (a) and (b) .
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