Combining fast electrical control and resonant excitation to create a wavelength-tunable and coherent quantum-dot light source

被引：0
|
作者：
Bennett, A. J. [1 ]
Cao, Y. [1 ,2 ]
Ellis, D. J. P. [1 ]
Farrer, I. [3 ]
Ritchie, D. A. [3 ]
Shields, A. J. [1 ]
机构：
[1] Toshiba Res Europe Ltd, Cambridge Res Lab, Cambridge CB4 OGZ, England
[2] Univ London Imperial Coll Sci Technol & Med, Controlled Quantum Dynam Grp, London SW7 2AZ, England
[3] Univ Cambridge, Cavevdish Lab, Cambridge CB3 0HE, England
来源：
QUANTUM DOTS AND NANOSTRUCTURES: SYNTHESIS CHARACTERIZATION AND MODELING XII | 2015年 / 9373卷
关键词：
quantum dot; diode; coherence; quantum; EMISSION;
D O I：
10.1117/12.2076271
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We have realized an ultrafast diode containing a single quantum dot, whose transitions can be Stark shifted in a few hundred picoseconds. Carrying out resonant excitation of this sample we demonstrate pulsed single photon emission with high spectral purity, by rapidly sweeping the neutral exciton transition into and out of the laser energy. Detailed study of the detuning dependence of the fluorescence reveals sources of decoherence in this sample, which we show can be filtered out with narrow-band excitation.
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页数：6
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