Anomalous dynamic characteristics of semiconductor quantum-dot lasers generating on two quantum states

被引：0
|
作者：
G. S. Sokolovskii
M. A. Cataluna
A. G. Deryagin
V. I. Kuchinskii
I. I. Novikov
M. V. Maksimov
A. E. Zhukov
V. M. Ustinov
W. Sibbett
E. U. Rafailov
机构：
[1] Russian Academy of Sciences,Ioffe Physico
[2] University of St. Andrews,Technical Institute
[3] University of Dundee,School of Physics and Astronomy
来源：
Technical Physics Letters | 2007年 / 33卷
关键词：
73.21.La; 78.67.Hc; 85.35.Be;
D O I：
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摘要：
Dynamics of the emission spectra of semiconductor quantum dot (QD) lasers generating on two quantum states has been experimentally studied. Being pumped with 30-ns current pulses, a QD laser ceased to generate 2–5 ns after switch-on and exhibited a pause up to 10 ns or longer, depending on the pumping pulse amplitude. After the subsequent switch-on, the laser generated short (200–300 ps) pulses of emission from the excited state of QDs followed by minima of comparable duration (dark pulses) corresponding to the ground-state emission. This behavior is explained in terms of the laser Q-switching due to the charge carrier density redistribution between the excited and ground states.
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页码：4 / 7
页数：3
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