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. 2015 May 29;5:10751. doi: 10.1038/srep10751

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(A) Normalized image of fluorescence from a QD film showing the beam profile of a tightly focused Gaussian beam. (B) Normalized image of the tightly focused Gaussian beam being scanned across a QD film. (C) Normalized image of a relaxed Gaussian beam exciting the same QD film. Spots in the image are due to imperfections in the QD film.