Optical spectroscopy of single quantum dot molecules under applied electric field. Shtrichman, I., Metzner, C., Gerardot, B., Schoenfeld, W., & Petroff, P. Physica E: Low-dimensional Systems and Nanostructures, 13(2-4):119-122, ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 3, 2002.
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The photoluminescence spectrum of individual pairs of vertically stacked InAs quantum dots is investigated as a function of an external electric field along the growth direction. Comparing samples with different inter-dot distances, we find for the case of the closest pairs clear experimental evidences of single carrier transfer from one dot to the other, with a transfer rate that is controlled by the applied voltage. We model the spectra with a theoretical calculation, which takes into account both the field-dependent carrier kinetics and the many-body interactions in the quantum dot molecule. (C) 2002 Elsevier Science B.V. All rights reserved.

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