Giant photon bunching, superradiant pulse emission and excitation trapping in quantum-dot nanolasers.
Giant photon bunching, superradiant pulse emission and excitation trapping in quantum-dot nanolasers.
复制标题
DOI：
10.1038/ncomms11540
复制
发表时间：
2016-05-10
影响因子：
16.6
通讯作者：
Höfling S
中科院分区：
文献类型：
--
作者：
Jahnke F;Gies C;Aßmann M;Bayer M;Leymann HA;Foerster A;Wiersig J;Schneider C;Kamp M;Höfling S
光通常只以它的经典性质为特征，如强度或相干性。当观察它的量子特性时，通过光子相关性描述，可以揭示关于产生辐射的物质状态的新信息。特别是独立和纠缠发射体之间的差异，这是量子力学的核心，可以在发射光的光子统计中可见。当发射体之间存在量子力学关联时，超辐射现象就会发生。尽管如此，超辐射以前只在经典光的性质方面得到了证明。在这里，我们提供了活性材料的量子相关性和发射辐射中的光子相关性之间的缺失环节。我们使用的超辐射量子点在腔量子电动力学激光器显示超辐射脉冲发射和光子相关函数的显着变化之间的直接联系。这直接证明了量子力学相关性及其在新型光电器件中载流子和光子之间的转移的重要性。 经典光源的特征在于它们的强度和相干性，而量子光源由光子相关性描述。在这里，作者为纳米激光器中量子点的超辐射发射提供了两者之间的联系。
Light is often characterized only by its classical properties, like intensity or coherence. When looking at its quantum properties, described by photon correlations, new information about the state of the matter generating the radiation can be revealed. In particular the difference between independent and entangled emitters, which is at the heart of quantum mechanics, can be made visible in the photon statistics of the emitted light. The well-studied phenomenon of superradiance occurs when quantum–mechanical correlations between the emitters are present. Notwithstanding, superradiance was previously demonstrated only in terms of classical light properties. Here, we provide the missing link between quantum correlations of the active material and photon correlations in the emitted radiation. We use the superradiance of quantum dots in a cavity-quantum electrodynamics laser to show a direct connection between superradiant pulse emission and distinctive changes in the photon correlation function. This directly demonstrates the importance of quantum–mechanical correlations and their transfer between carriers and photons in novel optoelectronic devices. Classical light sources are characterized by their intensity and coherence, whereas quantum light sources are described by photon correlations. Here, the authors provide a connection between the two for the case of superradiant emission from quantum dots in a nanolaser.