Single Quantum Emitter Dicke Enhancement

• URL: http://arxiv.org/abs/2010.12585v2
• Date: Thu, 25 Mar 2021 17:02:36 GMT
• Title: Single Quantum Emitter Dicke Enhancement
• Authors: Tommaso Tufarelli, Daniel Friedrich, Heiko Gro{\ss}, Joachim Hamm, Ortwin Hess and Bert Hecht
• Abstract summary: Coupling identical emitters to the same field mode is well-established method to enhance light matter interaction. We show that an effective Jaynes-Cummings model emerges, with a boosted coupling constant of order $sqrtN$. Our findings match up very well with recent broadband plasmonic nanoresonator strong-coupling experiments.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Coupling $N$ identical emitters to the same field mode is well-established method to enhance light matter interaction. However, the resulting $\sqrt{N}$ boost of the coupling strength comes at the cost of a "linearized" (effectively semi-classical) dynamics. Here, we instead demonstrate a new approach for enhancing the coupling constant of a \textit{single} quantum emitter, while retaining the nonlinear character of the light-matter interaction. We consider a single quantum emitter with $N$ nearly degenerate transitions that are collectively coupled to the same field mode. We show that in such conditions an effective Jaynes-Cummings model emerges, with a boosted coupling constant of order $\sqrt{N}$. The validity and consequences of our general conclusions are analytically demonstrated for the instructive case $N=2$. We further observe that our system can closely match the spectral line shapes and photon autocorrelation functions typical of Jaynes-Cummings physics, hence proving that quantum optical nonlinearities are retained. Our findings match up very well with recent broadband plasmonic nanoresonator strong-coupling experiments and will therefore facilitate the control and detection of single-photon nonlinearities at ambient conditions.

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