Field Quantization in Arbitrarily-Shaped Metal Nanoparticles

In the last few decades, plasmon nanoparticles (NP) have been proposed as a suitable platform to control and enhance the light-matter interaction. Nowadays, modern technologies are pushing this interaction to the extreme: single quantum emitters can be isolated, few-nanometer particles can be fabricated, single-photon state can be measured. For a complete analysis of the coupling phenomena involving plasmon nanoparticles, a proper quantum description is needed.