Photon Correlation Spectroscopy of a Single Quantum Dot

Details Photon Correlation Spectroscopy of a Single Quantum Dot Photon Correlation Spectroscopy of a Single Quantum Dot

2001-08-28

arxiv.org/abs/cond-mat/0108450v1

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevB.65.161303

We report photon correlation measurements that allow us to observe unique signatures of biexcitons in a single self-assembled InAs quantum dot. Photon correlation measurements of biexciton emission exhibit both bunching and antibunching under continuous-wave excitation while only antibunching is observed under pulsed excitation. Cross-correlation between biexciton and single-exciton peaks reveal highly asymmetric features, demonstrating that biexciton and exciton emissions have strong correlations due to cascaded emission. The anticipated correlation between the polarization of exciton and biexciton emissions however, is absent under our excitation conditions. Photon correlation measurements also provide evidence for the identification of the charged exciton emission.

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