Excitonic Rabi oscillations in self-assembled quantum dots in the presence of a local field effect
Excitonic Rabi oscillations in self-assembled quantum dots in the presence of a local field effect
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局部场效应存在下自组装量子点的激子拉比振荡
DOI：
10.1103/physrevb.87.241301
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
and Naoki Ohtani
中科院分区：
文献类型：
--
作者：
Kenta Asakura;Yasuyoshi Mitsumori;Hideo Kosaka;Keiichi Edamatsu;Kouichi Akahane;Naokatsu Yamamoto;Masahide Sasaki;and Naoki Ohtani
我们利用双脉冲光子回波光谱实验研究了自组装半导体量子点中的激子拉比振荡。我们观察了第二个脉冲强度对拉比振荡形状的影响。通过数值计算系统地再现了我们的实验结果，其中考虑了量子点中光生电荷密度之间的库仑相互作用产生的局域场效应。我们的实验结果表明，局域场效应对量子点中激子的相干光学响应有很大的贡献。
We experimentally studied the excitonic Rabi oscillations in self-assembled semiconductor quantum dots using two-pulse photon echo spectroscopy. We observed the change in the shape of the Rabi oscillations by the second pulse intensity. Our experimental results were systematically reproduced by numerical calculations taking into account the local field effect arising from the Coulomb interaction between photoinduced charge densities in a quantum dot. Our experimental findings indicated that the local field effect contributes considerably to the coherent optical responses of the excitons in quantum dots.