Deterministic generation of a quantum-dot-confined triexciton and its radiative decay via three-photon cascade

Article

关键词: ENTANGLED PHOTON PAIRS;    FINE-STRUCTURE;    EXCITON;    LIGHT;   

DOI  :  10.1103/PhysRevB.90.241411

来源: SCIE

【 摘 要 】

Semiconductor quantum dots (QDs) have potential applications in quantum information processing due to the fact that they are potential on-demand sources of single and entangled photons. Generation of polarization-entangled photon pairs was demonstrated using the biexciton-exciton radiative cascade. One obvious way to increase the number of quantum correlated photons that the QDs emit is to use higher-order multiexcitons, in particular, the triexciton. Towards achieving this goal, we first demonstrate deterministic generation of the QD-confined triexciton in a well-defined coherent state and then spectrally identify and directly measure a three-photon radiative cascade resulting from the sequential triexciton-biexciton-exciton radiative recombination.

【 授权许可】

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