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. 2019 Jul 12;5(7):eaav5931. doi: 10.1126/sciadv.aav5931

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Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1 — (A) The strongly confined ∣E_z∣ fields in a single isolated QD (CdSe/ZnS) with a 0.5-nm dielectric capping layer (Al₂O₃) and a tilted Au tip induce coupling between the plasmon and exciton. Simulated out-of-plane (B) and in-plane (C) optical field distributions in the plasmonic cavity shown in (A). a.u., arbitrary units. (D) Energy diagram for the plasmonic cavity (red), QD (blue), and upper and lower polariton states (green) with PL energy in the weak (orange) and strong (green) coupling regimes. When the coupling exceeds system losses, the split polariton states emerge and the system begins to undergo Rabi splittings and Rabi oscillations, as illustrated above.