Non-hermitian Hamiltonian description for quantum plasmonics: from dissipative dressed atom picture to Fano states
Journal article, 2019

We derive effective Hamiltonians for a single dipolar emitter coupled to a metal nanoparticle (MNP) with particular attention devoted to the role of losses. For small particles sizes, absorption dominates and a non-hermitian effective Hamiltonian describes the dynamics of the hybrid emitter-MNP nanosource. We discuss the coupled system dynamics in the weak and strong coupling regimes offering a simple understanding of the energy exchange, including radiative and non-radiative processes. We define the plasmon Purcell factors for each mode. For large particle sizes, radiative leakages can significantly perturbate the coupling process. We propose an effective Fano Hamiltonian including plasmon leakages and discuss the link with the quasi-normal mode description. We also propose Lindblad equations for each situation and introduce a collective dissipator for describing the Fano behavior.

Fano states

non-hermitian

quantum plasmonics

Author

H. Varguet

University of Burgundy - Franche-Comté

Benjamin Rousseaux

Chalmers, Physics, Bionanophotonics

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

D. Dzsotjan

Hungarian Academy of Sciences

H. R. Jauslin

University of Burgundy - Franche-Comté

S. Guerin

University of Burgundy - Franche-Comté

G. Colas des Francs

University of Burgundy - Franche-Comté

Journal of Physics B: Atomic, Molecular and Optical Physics

0953-4075 (ISSN)

Vol. 52 5 055404

Subject Categories

Meteorology and Atmospheric Sciences

Atom and Molecular Physics and Optics

Other Physics Topics

DOI

10.1088/1361-6455/ab008e

More information

Latest update

3/26/2019