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Indian Journal of Physics

Role of anharmonicity binding energy on the transition dynamics of GaAs quantum dot in presence of noise

Swarnab Datta, Bhaskar Bhakti, Manas Ghosh

Published Sep 2, 2023• 0 citations
Publisher
DOI
10.1007/s12648-023-02901-x

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We observe single-photon interferograms for emission of a single self-assembled GaAs quantum dot. A phase stabilizer is applied to the interferometer, enabling us to trace autocorrelations of weak emissions with a photon-counting level. At low excitation, where the average number of excitons in a dot is less than one, interferography reveals a single exponential decay, reflecting excitonic decoherence. At moderately high excitation, polarization interference between the exciton-biexciton transitions is found to appear on the interferogram. The decoherence time and the binding energy of biexcitons are determined simultaneously.