Polarization-dependent light-matter coupling and highly indistinguishable resonant fluorescence photons from quantum dot-micropillar cavities with elliptical cross section
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We study the optical properties of coupled quantum dot-microcavity systems with elliptical cross section. First, we develop an analytic model that describes the spectrum of the cavity modes that are split due to the reduced symmetry of the resonator. By coupling the QD emission to the polarized fundamental cavity modes, we observe the vectorial nature of the Purcell enhancement, which depends on the intrinsic polarization of the quantum dot and its relative alignment with respect to the cavity axis. The variable interaction strength of the QD with the polarized cavity modes leads to the observation of strong and weak coupling. Finally, we demonstrate the capability of elliptical micropillars to emit single and highly indistinguishable photons (visibility of 87%).
Gerhardt , S , Deppisch , M , Betzold , S , Harder , T H , Liew , T C H , Predojević , A , Höfling , S & Schneider , C 2019 , ' Polarization-dependent light-matter coupling and highly indistinguishable resonant fluorescence photons from quantum dot-micropillar cavities with elliptical cross section ' , Physical Review. B, Condensed matter and materials physics , vol. 100 , no. 11 , 115305 . https://doi.org/10.1103/PhysRevB.100.115305
Physical Review. B, Condensed matter and materials physics
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DescriptionFunding: Project HYPER-U-P-Shas received funding from the QuantERA ERA-NET Cofund in Quantum Technologies implemented within the European Union’s Horizon 2020 Programme.
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