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Physica E Low-dimensional Systems and Nanostructures

Entanglement of an exciton in a quantum dot molecule in radiation pulses

Y.S. Liu, Xuan Yang, Hengrui Chen

Published May 11, 2004• 1 citation
Publisher
DOI
10.1016/j.physe.2004.03.010

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Abstract Lateral quantum dot molecules promise a scalable approach to quantum registers. The individual neutral exciton states can be controlled by a lateral bias voltage. In this way radiative emission of localized excitons can be switched between the two quantum dots in the molecule. Here, we report on coherent absorption spectroscopy of a single quantum dot molecule. By transient reflection spectroscopy we demonstrate that not only the emission but also the absorption switches from one dot to the other when varying the applied electric field. This result is consistent with Rabi flopping showing a radically suppressed dipole moment for the non‐emitting exciton transition