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Article Dans Une Revue Physical Review B Année : 2023

Phonon-mediated dark to bright plasmon conversion

Résumé

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.

Dates et versions

hal-03972674 , version 1 (03-02-2023)

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Benjamin Rousseaux, Yanko Todorov, Angela Vasanelli, Carlo Sirtori. Phonon-mediated dark to bright plasmon conversion. Physical Review B, 2023, 108 (12), pp.125417. ⟨10.1103/PhysRevB.108.125417⟩. ⟨hal-03972674⟩
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