Non-hermitian Hamiltonian description for quantum plasmonics: from dissipative dressed atom picture to Fano states
Artikel i vetenskaplig tidskrift, 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

Författare

H. Varguet

Université Bourgogne Franche-Comté

Benjamin Rousseaux

Chalmers, Fysik, Bionanofotonik

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

D. Dzsotjan

Magyar Tudomanyos Akademia

H. R. Jauslin

Université Bourgogne Franche-Comté

S. Guerin

Université Bourgogne Franche-Comté

G. Colas des Francs

Université Bourgogne Franche-Comté

Journal of Physics B: Atomic, Molecular and Optical Physics

0953-4075 (ISSN)

Vol. 52 5 055404

Ämneskategorier

Meteorologi och atmosfärforskning

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1088/1361-6455/ab008e

Mer information

Senast uppdaterat

2019-03-26