Effects of pre-determined lateral separation on quantum dot size and dissolution

Joanna Millunchick

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joannamm@umich.edu

2014 HH Dow

T: (734) 647-8980

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A. J Martin, T. W Saucer, V. Sih, and J. M Millunchick (2013)

APPLIED PHYSICS LETTERS, 102(18).

Placing quantum dots in precise arrays provides a unique environment inwhich to study the effects of surface energy driven quantum dotdissolution occurring during capping, which is difficult to study usingrandomly assembled dots. Quantum dot photoluminescence emission energyis shown to initially decrease with increasing pattern spacing, but thenincreases for separations greater than 1.0 mu m. The shift inphotoluminescence emission results from a competition between theeffects of dot size and those of dissolution on the dot emission energy.These data also demonstrate the difference in the diffusion length of Inon InAs and on GaAs. (C) 2013 AIP Publishing LLC.

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