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Parametric scattering of microcavity polaritons into ghost branches

Zajac, Joanna M. and Langbein, Wolfgang Werner 2015. Parametric scattering of microcavity polaritons into ghost branches. Physical Review B: Condensed Matter and Materials Physics 92 (16) , 165305. 10.1103/PhysRevB.92.165305

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Polaritons of defined momentum and energy are excited resonantly on the lower polariton branch of a planar semiconductor microcavity in the strong coupling regime, and the spectrally and momentum resolved emission is analyzed. We observe ghost branches from scattering within the lower polariton branch, as well as from scattering to the middle polariton branch, showing the nonlinear mixing between different branches. Extending the theoretical treatment of spontaneous parametric luminescence developed in Ciuti et al. [Phys. Rev. B 63, 041303 (2001)], the eigenmodes of the driven polariton system and its photoluminescence are modeled. A quantitative agreement with the measured branch positions and a qualitative agreement with the branch intensities is found.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Publisher: American Physical Society
ISSN: 1098-0121
Funders: EPSRC
Date of First Compliant Deposit: 7 June 2017
Date of Acceptance: 18 September 2015
Last Modified: 30 Jun 2019 23:15

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