Phonon-mediated dark to bright plasmon conversion
- URL: http://arxiv.org/abs/2301.08935v1
- Date: Sat, 21 Jan 2023 10:48:57 GMT
- Title: Phonon-mediated dark to bright plasmon conversion
- Authors: Benjamin Rousseaux, Yanko Todorov, Angela Vasanelli, Carlo Sirtori
- Abstract summary: 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.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- 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.
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