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Spin Fine Structure in Optically Excited Quantum Dot Molecules

M. Scheibner·M. F. Doty·I. V. Ponomarev·A. S. Bracker·E. A. Stinaff·V. L. Korenev·T. L. Reinecke·D. Gammon
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Abstract

The interaction between spins in coupled quantum dots is revealed in distinct fine structure patterns in the measured optical spectra of InAs/GaAs double quantum dot molecules containing zero, one, or two excess holes. The fine structure is explained well in terms of a uniquely molecular interplay of spin exchange interactions, Pauli exclusion and orbital tunneling. This knowledge is critical for converting quantum dot molecule tunneling into a means of optically coupling not just orbitals, but spins.

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M. Scheibner, M. F. Doty, I. V. Ponomarev, A. S. Bracker, E. A. Stinaff, V. L. Korenev, T. L. Reinecke, D. Gammon. 2007-06-15. Spin Fine Structure in Optically Excited Quantum Dot Molecules. https://doi.org/10.1103/physrevb.75.245318

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