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Population dynamics and photon emission statistics of the coupled semiconductor quantum dots driven by pulse field

Department of Physics, Wuhan University, Wuhan 430072, China; State Key Laboratory for Surface Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100080, China
Physica E Low-dimensional Systems and Nanostructures (Impact Factor: 1.52). 01/2008; DOI:10.1016/j.physe.2007.09.096

ABSTRACT We investigate the population dynamics and the photon emission statistics of the coupled semiconductor quantum dots (QDs) with pulse excitation by using quantum regression theorem and optical Bloch equations. The population of the biexciton state |b〉 is close to those of two exciton states (|x〉 and |y〉) when the effective input pulse area is about π. The calculation results reveal that both the probabilities of the cross single photon emission and the correlated photon-pair emission decrease as the input pulse area increases in every period.

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