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

被引：15
|
作者：
Liu, F. [1 ]
Martins, L. M. P. [1 ]
Brash, A. J. [1 ,2 ]
Barth, A. M.
Quilter, J. H. [1 ,3 ]
Axt, V. M. [2 ]
Skolnick, M. S. [1 ]
Fox, A. M. [1 ]
机构：
[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
[2] Univ Bayreuth, Inst Theoret Phys 3, POB 101251, D-95440 Bayreuth, Germany
[3] Univ London, Dept Phys, Egham TW20 0EX, Surrey, England
来源：
PHYSICAL REVIEW B | 2016年 / 93卷 / 16期
基金：
英国工程与自然科学研究理事会;
关键词：
SINGLE-PHOTON SOURCE; COHERENT CONTROL; SYSTEM; LASER;
D O I：
10.1103/PhysRevB.93.161407
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
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页数：5
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