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Nonlocal effects in plasmon-emitter interactions.

Mikkel Have Eriksen1, Christos Tserkezis1, N Asger Mortensen1,2

  • 1POLIMA - Center for Polariton-Driven Light-Matter Interactions, University of Southern Denmark, DK-5230 Odense, Denmark.

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|December 5, 2024
PubMed
Summary
This summary is machine-generated.

Surface-response functions (SRFs) significantly impact quantum light emitters near noble metal nanostructures. Understanding these functions is key to controlling quantum phenomena in nanoscale devices.

Keywords:
light–matter interactionsnonlocal responsequantum plasmonicssurface-response functions

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Area of Science:

  • Plasmonics and Nanophotonics
  • Quantum Electrodynamics
  • Materials Science

Background:

  • Quantum mechanical phenomena in noble metal nanostructures are critical at the few-nanometer scale.
  • Surface-response functions (SRFs), like Feibelman d-parameters, describe mesoscopic effects at metal-dielectric interfaces.

Purpose of the Study:

  • To investigate the influence of SRFs on quantum electrodynamic phenomena for emitters near noble metal nanostructures.
  • To explore how dielectric environments and nanostructure geometry affect SRFs and quantum dynamics.

Main Methods:

  • Theoretical modeling of quantum electrodynamic phenomena (Purcell enhancement, Lamb shift) near various noble metal nanostructures.
  • Calculation of SRFs using the specular-reflection model for different dielectric environments.
  • Analysis of emitter quantum dynamics in response to changes in metal region width and dielectric permittivity.

Main Results:

  • SRFs significantly alter Purcell enhancement and Lamb shift for quantum emitters.
  • Higher dielectric permittivity increases SRF magnitude; larger surface-to-volume ratios enhance SRF role.
  • Decreasing metal width or increasing dielectric permittivity alters Purcell enhancement, Lamb shift, and emission spectra.

Conclusions:

  • SRFs are crucial for understanding quantum emitter behavior in proximity to plasmonic nanostructures.
  • Experimental spectra fitting to theoretical models could enable the determination of Feibelman d-parameters.