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Physica E Low-dimensional Systems and Nanostructures

Realization of position-dependent absorption based on biexciton coherence in a Quantum Dot Nanostructure

Hamid Reza Hamedi, Hadi Afshari

Published Sep 18, 2015• 4 citations
Publisher
DOI
10.1016/j.physe.2015.09.010

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Summary form only given. Two excitons can bind to form a biexciton through the Coulomb interaction. In a quantum dot (QD), the binding is greatly enhanced due to 3D confinement. Previous work has focused on luminescence from biexciton-to-exciton transitions. We report the first coherent nonlinear optical spectra of a biexcitonic system. Such types of studies provide vital information on the exciton/biexciton lifetime as well as the optically-induced quantum coherence and its decay. The realization of coherent optical devices based on QD systems, such as proposed for quantum logic operations, relies critically on these measurements.

Quantum Electronics and Laser Science Conference•Nov 13, 2002•0 citations
Summary form only given. Two excitons can bind to form a biexciton through the Coulomb interaction. In a quantum dot (QD), the binding is greatly enhanced due to 3D confinement. Previous work has focused on luminescence from biexciton-to-exciton transitions. We report the first coherent nonlinear optical spectra of a biexcitonic system. Such types of studies provide vital information on the exciton/biexciton lifetime as well as the optically-induced quantum coherence and its decay. The realization of coherent optical devices based on QD systems, such as proposed for quantum logic operations, relies critically on these measurements.