Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom.
Department of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
Phys Rev Lett. 2019 Oct 18;123(16):167403. doi: 10.1103/PhysRevLett.123.167403.
Coherent scattering of light by a single quantum emitter is a fundamental process at the heart of many proposed quantum technologies. Unlike atomic systems, solid-state emitters couple to their host lattice by phonons. Using a quantum dot in an optical nanocavity, we resolve these interactions in both time and frequency domains, going beyond the atomic picture to develop a comprehensive model of light scattering from solid-state emitters. We find that even in the presence of a low-Q cavity with high Purcell enhancement, phonon coupling leads to a sideband that is completely insensitive to excitation conditions and to a nonmonotonic relationship between laser detuning and coherent fraction, both of which are major deviations from atomlike behavior.
单个量子发射器的相干光散射是许多提出的量子技术的核心基本过程。与原子系统不同，固态发射器通过声子与宿主晶格耦合。我们使用光学纳米腔中的量子点在时间和频率域中解决这些相互作用，超越原子图像，开发出固态发射器光散射的综合模型。我们发现，即使在具有高 Purcell 增强的低 Q 腔的情况下，声子耦合也会导致边带完全不受激发条件的影响，以及激光失谐与相干分数之间的非单调关系，这两者都是与原子行为的主要偏差。
