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Proceedings Paper

Tuning quantum dot states with optical fields
Author(s): Glenn S. Solomon; Andreas Muller; John Lawall; Wei Fang
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Paper Abstract

The discrete states resulting from three-dimensional confinement in semiconductor quantum dots retain much of the character of their bulk-band origins, for example their angular momentum and effective mass. In addition they have many features of discrete atomic-like single particle states. Strong optical field interactions and reasonable dephasing rates make this system attractive for basic quantum optics experiments, as well as applications in quantum information sciences. However, semiconductor quantum dots have large inhomogeneous state broadens due to variations in size and shape. In addition, epitaxial semiconductor quantum dots, one of the classes in common use, rarely have ideal symmetry. Here we show how an optical technique can be used to fine-tune the transition energies of semiconductor quantum dots states and if desired restore targeted symmetry elements. This approach can be applied to establish degeneracies in biexciton-exciton decays to form discrete entangled photon pairs or to establish indistinguishability between different quantum dots.

Paper Details

Date Published: 22 January 2010
PDF: 7 pages
Proc. SPIE 7608, Quantum Sensing and Nanophotonic Devices VII, 76080L (22 January 2010); doi: 10.1117/12.853152
Show Author Affiliations
Glenn S. Solomon, Joint Quantum Institute (United States)
National Institute of Standards and Technology (United States)
Andreas Muller, Joint Quantum Institute (United States)
John Lawall, National Institute of Standards and Technology (United States)
Wei Fang, Joint Quantum Institute (United States)

Published in SPIE Proceedings Vol. 7608:
Quantum Sensing and Nanophotonic Devices VII
Manijeh Razeghi; Rengarajan Sudharsanan; Gail J. Brown, Editor(s)

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