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arXiv · 2011.14635

Tailored subcycle nonlinearities of ultrastrong light-matter coupling

J. Mornhinweg·M. Halbhuber·C. Ciuti·D. Bougeard·R. Huber·C. Lange
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Abstract

We explore the nonlinear response of tailor-cut light-matter hybrid states in a novel regime, where both the Rabi frequency induced by a coherent driving field and the vacuum Rabi frequency set by a cavity field are comparable to the carrier frequency of light. In this previously unexplored strong-field limit of ultrastrong coupling, subcycle pump-probe and multi-wave mixing nonlinearities between different polariton states violate the normal-mode approximation while ultrastrong coupling remains intact, as confirmed by our mean-field model. We expect such custom-cut nonlinearities of hybridized elementary excitations to facilitate non-classical light sources, quantum phase transitions, or cavity chemistry with virtual photons.

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J. Mornhinweg, M. Halbhuber, C. Ciuti, D. Bougeard, R. Huber, C. Lange. 2020-11-30. Tailored subcycle nonlinearities of ultrastrong light-matter coupling. https://doi.org/10.1103/physrevlett.126.177404

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