Phonon-mediated dark to bright plasmon conversion
Mesoscale and Nanoscale Physics
2023-11-09 v1 Quantum Physics
Abstract
The optical response of a matter excitation embedded in nanophotonic devices is commonly described by the Drude-Lorentz model. Here, we demonstrate that this widely used approach fails in the case where quantum-confined plasmons of a two-dimensional electron gas interact strongly with optical phonons. We propose a new quantum model which contains the semiclassical Drude-Lorentz one for simple electronic potentials, but predicts very different results in symmetry-broken potentials. We unveil a new mechanism for the oscillator strength transfer between bright phonon-polariton and dark plasmon modes, enabling thus new quantum degrees of freedom for designing the optical response of nanostructures.
Cite
@article{arxiv.2301.08935,
title = {Phonon-mediated dark to bright plasmon conversion},
author = {Benjamin Rousseaux and Yanko Todorov and Angela Vasanelli and Carlo Sirtori},
journal= {arXiv preprint arXiv:2301.08935},
year = {2023}
}