Ultrafast depopulation of a quantum dot by LA-phonon-assisted stimulated emission

Article

关键词: SINGLE-PHOTON SOURCE;    COHERENT CONTROL;    SYSTEM;    LASER;   

DOI  :  10.1103/PhysRevB.93.161407

来源: SCIE

【 摘 要 】

We demonstrate ultrafast incoherent depopulation of a quantum dot from above to below the transparency point using LA-phonon-assisted emission stimulated by a redshifted laser pulse. The QD is turned from a weakly vibronic system into a strongly vibronic one by laser driving which enables the phonon-assisted relaxation between the excitonic components of two dressed states. The depopulation is achieved within a laser pulse-width-limited time of 20 ps and exhibits a broad tuning range of a few meV. Our experimental results are well reproduced by path-integral calculations.

【 授权许可】

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