Abstract

This paper shows that photon-echo, optical-nutation, and quantum-beat effects in which elliptically polarized light pulses are excited are possible in a medium whose resonance properties are determined by an ensemble of isolated two-electron quantum dots. The scatter of the uniform quantization frequencies and of the Coulomb interaction values of the electrons because the quantum dots differ in size results in inhomogeneous broadening of the resonance transitions. Numerical solutions showed that, under the conditions of the inhomogeneous broadening model introduced here, the frequency of the quantum beats is proportional to the Coulomb interaction of the electrons in a quantum dot.

© 2008 Optical Society of America

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