Polarization-correlated photon pairs from a single quantum dot

Article

关键词: FINE-STRUCTURE;    EXCITONS;    GAAS;    SPECTROSCOPY;    RELAXATION;    BIEXCITONS;    LIFETIMES;    EMISSION;    BEATS;    TIME;   

DOI  :  10.1103/PhysRevB.66.045308

来源: SCIE

【 摘 要 】

Polarization correlation in a linear basis, but not entanglement, is observed between the biexciton and single-exciton photons emitted by a single InAs quantum dot in a two-photon cascade. The results are well described quantitatively by a probabilistic model that includes two decay paths for a biexciton through a nondegenerate pair of one-exciton states, with the polarization of the emitted photons depending on the decay path. The results show that spin nondegeneracy due to quantum-dot asymmetry is a significant obstacle to the realization of an entangled-photon generation device.

【 授权许可】

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