arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1703.04014cond-mat.mes-hall
收藏

量子点-腔器件引起的光学偏振旋转层析成像

Tomography of optical polarization rotation induced by a quantum dot-cavity device

C. Antón, C. A. Kessler, P. Hilaire, J. Demory, C. Gómez, A. Lemaître, I. Sagnes, N. D. Lanzillotti-Kimura, O. Krebs, N. Somaschi, P. Senellart, L. Lanco

AI总结:

本文提出一种层析成像方法,通过分析反射光子偏振密度矩阵,揭示量子点-腔器件中单个量子点可引发20度偏振旋转且纯度超84%,并区分相干与非相干贡献。

摘要:

我们引入一种层析成像方法,通过分析庞加莱球上反射光子的偏振密度矩阵,来描述腔量子电动力学器件的光学响应,超越了偏振旋转的半经典图像。将该方法应用于电控量子点-腔器件,我们展示单个共振激发的量子点在庞加莱球的纬度和经度上引起$20^\circ$的大光学偏振旋转,偏振纯度保持在$84\\%$以上。量子点共振荧光通过其相干部分对偏振旋转做出贡献,而其非相干部分则导致偏振纯度降低。

英文摘要:

We introduce a tomography approach to describe the optical response of a cavity quantum electrodynamics device, beyond the semiclassical image of polarization rotation, by analyzing the polarization density matrix of the reflected photons in the Poincaré sphere. Applying this approach to an electrically-controlled quantum dot-cavity device, we show that a single resonantly-excited quantum dot induces a large optical polarization rotation by $20^\circ$ in latitude and longitude in the Poincaré sphere, with a polarization purity remaining above $84\%$. The quantum dot resonance fluorescence is shown to contribute to the polarization rotation via its coherent part, whereas its incoherent part contributes to degrading the polarization purity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑