Quantum description and emergence of nonlinearities in strongly coupled single-emitter nanoantenna systems
Journal article, 2018

Realizing strong coupling between a single quantum emitter (QE) and an optical cavity is of crucial importance in the context of various quantum optical applications. Although Rabi splitting of single quantum emitters coupled to high-Q classical cavities has been reported in numerous configurations, attaining single emitter Rabi splitting with a plasmonic nanostructure remains a challenge. In particular, strong coupling at the single QE regime would open the path for the realization of single-photon nonlinearities. In this paper, we derive a plasmon quantization procedure for systems consisting of a single QE located in the gap of a nanoantenna. This procedure leads to the description of the quantum dynamics by a master equation for the state of the QE and the quantized plasmonic modes, which is crucial to demonstrate the emergence of single-photon nonlinearities. We investigate numerically the optical response and the resulting Rabi splitting in metallic nanoantennas and find the optimal geometries for the emergence of the strong-coupling regime with single QEs. Finally, we demonstrate the saturation of hybridized modes for a chosen configuration. Our results will be useful for implementation of realistic quantum plasmonic nanosystems involving single QEs at room temperature.


Benjamin Rousseaux

Chalmers, Physics, Bionanophotonics

Denis Baranov

University of Gothenburg

Mikael Käll

Chalmers, Physics, Bionanophotonics

Timur Shegai

Chalmers, Physics, Bionanophotonics

Göran Johansson

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Physical Review B

2469-9950 (ISSN) 2469-9969 (eISSN)

Vol. 98 4 045435

Kvantplasmonik – en teknologi för foton-fotonväxelverkan på kvantnivå vid rumstemperatur

Swedish Research Council (VR) (2016-06059), 2017-01-01 -- 2022-12-31.

Areas of Advance

Nanoscience and Nanotechnology

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Condensed Matter Physics



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