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Quantum plasmonics of metal nanoparticles

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Abstract

A new theoretical approach is developed that describes quantum optical properties of metal nanoparticles interacting with an electromagnetic field. In the linear regime of interaction, the model treats a metal nanoparticle as a two-level quantum system comprised of the lowest plasmonic Fock states governed by the optical Bloch equations. This approach not only agrees with the classical results, but provides also a direct link to quantum optics and cavity quantum electrodynamics that allows one to predict quantum phenomena not anticipated from a classical description. The new model is applied to the calculations of the radiative relaxation rate in a nanoparticle, the quantum beats in the intensity of radiation from a nanoparticle dimer, and the radiative relaxation rate in both 1D and 2D nanoparticle arrays in close vicinity to a reflective surface.

© 2019 Optical Society of America

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