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 language | English |
|---|---|
| Journal | ACS Photonics |
| Volume | 5 |
| Issue number | 1 |
| Pages (from-to) | 133-142 |
| ISSN | 2330-4022 |
| DOIs | |
| Publication status | Published - 17. Jan 2018 |
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Keywords
- Landau damping
- nonlocal optical response
- plexcitonics
- strong coupling
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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 journal › Journal article › Research › peer-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
DO - 10.1021/acsphotonics.7b00538
M3 - Journal article
VL - 5
SP - 133
EP - 142
JO - A C S Photonics
JF - A C S Photonics
SN - 2330-4022
IS - 1
ER -