Cavity-enhanced coherent light scattering from a quantum dot.
Cavity-enhanced coherent light scattering from a quantum dot.
复制标题
DOI：
10.1126/sciadv.1501256
复制
发表时间：
2016-04
期刊：
影响因子：
13.6
通讯作者：
Shields AJ
中科院分区：
文献类型：
--
作者：
Bennett AJ;Lee JP;Ellis DJ;Meany T;Murray E;Floether FF;Griffths JP;Farrer I;Ritchie DA;Shields AJ
微腔提高了共振光子散射的效率，产生纯的、不可区分的单光子。相干且不可区分的单光子的产生是信息处理和计量中光子量子技术的关键一步。一个有前途的系统是嵌入波长尺度三维腔中的固态发射器的谐振光学激发。然而，这里的挑战是将不需要的激发抑制到低于量子信号的水平。我们使用微柱中量子点的相干光子散射来证明这一点。研究表明，该空腔可以增强共振散射的光的比例，从而产生比时间带宽限制窄 16 倍的反聚束、难以区分的光子，即使在跃迁接近饱和时也是如此。最后，确定性激发用于创建双光子 N00N 态，我们用它在光子电路中进行超分辨相位测量。
A microcavity enhances the efficiency of resonant photon scattering, generating pure indistinguishable single photons. The generation of coherent and indistinguishable single photons is a critical step for photonic quantum technologies in information processing and metrology. A promising system is the resonant optical excitation of solid-state emitters embedded in wavelength-scale three-dimensional cavities. However, the challenge here is to reject the unwanted excitation to a level below the quantum signal. We demonstrate this using coherent photon scattering from a quantum dot in a micropillar. The cavity is shown to enhance the fraction of light that is resonantly scattered toward unity, generating antibunched indistinguishable photons that are 16 times narrower than the time-bandwidth limit, even when the transition is near saturation. Finally, deterministic excitation is used to create two-photon N00N states with which we make superresolving phase measurements in a photonic circuit.