Observation of low-lying excitations of electrons in coupled quantum dots

Details Observation of low-lying excitations of electrons in coupled quantum dots Observation of low-lying excitations of electrons in coupled quantum dots

2005-11-23

arxiv.org/abs/cond-mat/0511572v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, single column, including 3 figures

Scientific paper

10.1063/1.2185447

Tunneling excitations of electrons in dry-etched modulation-doped AlGaAs/GaAs coupled quantum dots (QDs) are probed by resonant inelastic light scattering. A sequence of intra- and intershell excitations are found at energies determined by the interplay between the QD confinement energy $\hbar \omega_0$ and the tunneling gap $\Delta_{SAS}$, the splitting between the symmetric and anti-symmetric delocalized single particle molecular states. The narrow line-widths displayed by electronic excitations in these nanostructures indicate promising venues for the spectroscopic investigation of entanglement of electron states in these artificial molecules.

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