Effect of photogenerated carriers on the spectral diffusion of a quantum dot coupled to a photonic crystal cavity

被引：21
作者：
Majumdar, Arka [1 ]
Kim, Erik D. [1 ]
Vuckovic, Jelena [1 ]
机构：
[1] Stanford Univ, EL Ginzton Lab, Stanford, CA 94305 USA
来源：
PHYSICAL REVIEW B | 2011年 / 84卷 / 19期
基金：
美国国家科学基金会;
关键词：
TRANSITION; INAS;
D O I：
10.1103/PhysRevB.84.195304
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We experimentally observe the effect of photogenerated carriers on the spectral diffusion of a quantum dot (QD) coupled to a photonic crystal (PC) cavity. In this system, spectral diffusion arises in part from charge fluctuations on the etched surfaces of the PC. We find that these fluctuations may be suppressed by photogenerated carriers, leading to a reduction of the measured QD linewidth by a factor of similar to 2 compared to the case where the photogenerated carriers are not present. This result demonstrates a possible means of countering the effects of spectral diffusion in QD-PC cavity systems and thus may be useful for quantum information applications where narrow QD linewidths are desired.
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页数：6
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