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arXiv · 0810.5649

Optical Anisotropy of Electronic Excitations in Elliptical Quantum Dots

Achintya Singha·Vittorio Pellegrini·Sokratis Kalliakos·Biswajit Karmakar·Aron Pinczuk·Loren N. Pfeiffer·Ken W. West
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Abstract

The authors report that anisotropic confining potentials in laterally-coupled semiconductor quantum dots (QDs) have large impacts in optical transitions and energies of inter-shell collective electronic excitations. The observed anisotropies are revealed by inelastic light scattering as a function of the in-plane direction of light polarization and can be finely controlled by modifying the geometrical shape of the QDs. These experiments show that the tuning of the QD confinement potential offers a powerful method to manipulate electronic states and far-infrared inter-shell optical transitions in quantum dots.

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Achintya Singha, Vittorio Pellegrini, Sokratis Kalliakos, Biswajit Karmakar, Aron Pinczuk, Loren N. Pfeiffer, Ken W. West. 2008-10-31. Optical Anisotropy of Electronic Excitations in Elliptical Quantum Dots. https://doi.org/10.1063/1.3080658

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