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20 August 2020 Single polariton nonlinear Faraday rotation
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We present the experimental observation of photon-photon interactions at the single-particle level. The linearly polarized signal beam undergoes Faraday rotation by a nonlinear effective magnetic field induced by a very weak circularly polarized control beam due to the giant Kerr-like interactions between exciton-polaritons in our quantum well-based 0D microcavity structures. We measure a phase shift with a slope of 3.5×10^-3 radians per particle for low cavity occupancies between 0.1 and 3 excited by the control beam. These experimental findings are in agreement with theoretical models and pave the way towards the development of scalable photonic quantum gates.
Conference Presentation
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T. Kuriakose, P. M. Walker, T. Dowling, P. St.-Jean, N. Carlon-Zambon, A. Lemaître, I. Sagnes, L. Legratiet, A. Harouri, S. Ravets, M. S. Skolnick, J. Bloch, and D. N. Krizhanovskii "Single polariton nonlinear Faraday rotation", Proc. SPIE 11461, Active Photonic Platforms XII, 114612C (20 August 2020);

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