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.
@article{arxiv.0810.5649,
title = {Optical Anisotropy of Electronic Excitations in Elliptical Quantum Dots},
author = {Achintya Singha and Vittorio Pellegrini and Sokratis Kalliakos and Biswajit Karmakar and Aron Pinczuk and Loren N. Pfeiffer and Ken W. West},
journal= {arXiv preprint arXiv:0810.5649},
year = {2009}
}