Robustness of the Rabi splitting under nonlocal corrections in plexcitonics

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Abstract

We explore theoretically how nonlocal corrections in the description of a metal affect the strong coupling between excitons and plasmons in typical examples where nonlocal effects are anticipated to be strong, namely, small metallic nanoparticles, thin metallic nanoshells, or dimers with narrow separations, either coated with or encapsulating an excitonic layer. Through detailed simulations based on the generalized nonlocal optical response theory, which simultaneously accounts both for modal shifts due to screening and for surface-enhanced Landau damping, we show that, contrary to expectations, the influence of nonlocality is rather limited, as in most occasions the width of the Rabi splitting remains largely unaffected and the two hybrid modes are well distinguishable. We discuss how this behavior can be understood in view of the popular coupled-harmonic-oscillator model, while we also provide analytic solutions based on Mie theory to describe the hybrid modes in the case of matryoshka-like single nanoparticles. Our analysis provides an answer to a so far open question, that of the influence of nonlocality on strong coupling, and is expected to facilitate the design and study of plexcitonic architectures with ultrafine geometrical details.

Original languageEnglish
JournalACS Photonics
Volume5
Issue number1
Pages (from-to)133-142
ISSN2330-4022
DOIs
Publication statusPublished - 17. Jan 2018

Fingerprint

Nanoshells
Metals
Nanoparticles
nanoparticles
Plasmons
encapsulating
Landau damping
Mie scattering
plasmons
Excitons
Dimers
harmonic oscillators
Screening
screening
Damping
dimers
excitons
shift
metals
simulation

Keywords

  • Landau damping
  • nonlocal optical response
  • plexcitonics
  • strong coupling

Cite this

@article{ccd0d9def380491fa6f3a2d1e65a2db0,
title = "Robustness of the Rabi splitting under nonlocal corrections in plexcitonics",
abstract = "We explore theoretically how nonlocal corrections in the description of a metal affect the strong coupling between excitons and plasmons in typical examples where nonlocal effects are anticipated to be strong, namely, small metallic nanoparticles, thin metallic nanoshells, or dimers with narrow separations, either coated with or encapsulating an excitonic layer. Through detailed simulations based on the generalized nonlocal optical response theory, which simultaneously accounts both for modal shifts due to screening and for surface-enhanced Landau damping, we show that, contrary to expectations, the influence of nonlocality is rather limited, as in most occasions the width of the Rabi splitting remains largely unaffected and the two hybrid modes are well distinguishable. We discuss how this behavior can be understood in view of the popular coupled-harmonic-oscillator model, while we also provide analytic solutions based on Mie theory to describe the hybrid modes in the case of matryoshka-like single nanoparticles. Our analysis provides an answer to a so far open question, that of the influence of nonlocality on strong coupling, and is expected to facilitate the design and study of plexcitonic architectures with ultrafine geometrical details.",
keywords = "Landau damping, nonlocal optical response, plexcitonics, strong coupling",
author = "Christos Tserkezis and Martijn Wubs and Mortensen, {N. Asger}",
year = "2018",
month = "1",
day = "17",
doi = "10.1021/acsphotonics.7b00538",
language = "English",
volume = "5",
pages = "133--142",
journal = "A C S Photonics",
issn = "2330-4022",
publisher = "American Chemical Society",
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Robustness of the Rabi splitting under nonlocal corrections in plexcitonics. / Tserkezis, Christos; Wubs, Martijn; Mortensen, N. Asger.

In: ACS Photonics, Vol. 5, No. 1, 17.01.2018, p. 133-142.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Robustness of the Rabi splitting under nonlocal corrections in plexcitonics

AU - Tserkezis, Christos

AU - Wubs, Martijn

AU - Mortensen, N. Asger

PY - 2018/1/17

Y1 - 2018/1/17

N2 - We explore theoretically how nonlocal corrections in the description of a metal affect the strong coupling between excitons and plasmons in typical examples where nonlocal effects are anticipated to be strong, namely, small metallic nanoparticles, thin metallic nanoshells, or dimers with narrow separations, either coated with or encapsulating an excitonic layer. Through detailed simulations based on the generalized nonlocal optical response theory, which simultaneously accounts both for modal shifts due to screening and for surface-enhanced Landau damping, we show that, contrary to expectations, the influence of nonlocality is rather limited, as in most occasions the width of the Rabi splitting remains largely unaffected and the two hybrid modes are well distinguishable. We discuss how this behavior can be understood in view of the popular coupled-harmonic-oscillator model, while we also provide analytic solutions based on Mie theory to describe the hybrid modes in the case of matryoshka-like single nanoparticles. Our analysis provides an answer to a so far open question, that of the influence of nonlocality on strong coupling, and is expected to facilitate the design and study of plexcitonic architectures with ultrafine geometrical details.

AB - We explore theoretically how nonlocal corrections in the description of a metal affect the strong coupling between excitons and plasmons in typical examples where nonlocal effects are anticipated to be strong, namely, small metallic nanoparticles, thin metallic nanoshells, or dimers with narrow separations, either coated with or encapsulating an excitonic layer. Through detailed simulations based on the generalized nonlocal optical response theory, which simultaneously accounts both for modal shifts due to screening and for surface-enhanced Landau damping, we show that, contrary to expectations, the influence of nonlocality is rather limited, as in most occasions the width of the Rabi splitting remains largely unaffected and the two hybrid modes are well distinguishable. We discuss how this behavior can be understood in view of the popular coupled-harmonic-oscillator model, while we also provide analytic solutions based on Mie theory to describe the hybrid modes in the case of matryoshka-like single nanoparticles. Our analysis provides an answer to a so far open question, that of the influence of nonlocality on strong coupling, and is expected to facilitate the design and study of plexcitonic architectures with ultrafine geometrical details.

KW - Landau damping

KW - nonlocal optical response

KW - plexcitonics

KW - strong coupling

U2 - 10.1021/acsphotonics.7b00538

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VL - 5

SP - 133

EP - 142

JO - A C S Photonics

JF - A C S Photonics

SN - 2330-4022

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