期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.197401
关键词
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资金
- Australian Research Council Centre of Excellence in Future Low-Energy Electronics Technologies [CE170100039]
- Australian Research Council Future Fellowship [FT160100244]
The study examines the interaction between strong light and matter, as well as charge doping. By using a simplified model of a two-dimensional semiconductor embedded in a microcavity, a diagrammatic formalism is developed for the system with an emphasis on the scatterings between different particles. Results indicate that the scattering between spin-polarized polaritons and electrons is significantly enhanced due to the shifted collision energy from strong light-matter coupling.
The interplay between strong light-matter interactions and charge doping represents an important frontier in the pursuit of exotic many-body physics and optoelectronics. Here, we consider a simplified model of a two-dimensional semiconductor embedded in a microcavity, where the interactions between electrons and holes are strongly screened, allowing us to develop a diagrammatic formalism for this system with an analytic expression for the exciton-polariton propagator. We apply this to the scattering of spin-polarized polaritons and electrons, and show that this is strongly enhanced compared with exciton-electron interactions. As we argue, this counterintuitive result is a consequence of the shift of the collision energy due to the strong light-matter coupling, and hence this is a generic feature that applies also for more realistic electron-hole and electron-electron interactions. We furthermore demonstrate that the lack of Galilean invariance inherent in the light-matter coupled system can lead to a narrow resonancelike feature for polariton-electron interactions close to the polariton inflection point. Our results are potentially important for realizing tunable light-mediated interactions between charged particles.
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