Localized exciton–polariton modes in dye-doped nanospheres: a quantum approach

Gentile, Martin J.; Horsley, S. A. R.; Barnes, William

doi:10.1088/2040-8978/18/1/015001

Cited by 18 publications

(23 citation statements)

References 59 publications

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“…Recently, excitonic materials alone (in the absence of conventional metal or dielectric scatterers) are of growing interest in the metasurface context. It has been shown that nanostructured excitonic media exhibit metallic properties, which may lead to plasmon-like optical field confinement in the forms akin to propagating SPP modes [296] as well as localized resonances [297,298]. Collective lattice resonances originating from such localized modes are predicted [299] in analogy to plasmonic lattice resonances.…”

Section: Strong Coupling and Excitonic Metasurfacesmentioning

confidence: 99%

Light-emitting metasurfaces

et al. 2019

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Photonic metasurfaces, that is, two-dimensional arrangements of designed plasmonic or dielectric resonant scatterers, have been established as a successful concept for controlling light fields at the nanoscale. While the majority of research so far has concentrated on passive metasurfaces, the direct integration of nanoscale emitters into the metasurface architecture offers unique opportunities ranging from fundamental investigations of complex light-matter interactions to the creation of flat sources of tailored light fields. While the integration of emitters in metasurfaces as well as many fundamental effects occurring in such structures were initially studied in the realm of nanoplasmonics, the field has recently gained significant momentum following the development of Mie-resonant dielectric metasurfaces. Because of their low absorption losses, additional possibilities for emitter integration, and compatibility with semiconductor-based light-emitting devices, all-dielectric systems are promising for highly efficient metasurface light sources. Furthermore, a flurry of new emission phenomena are expected based on their multipolar resonant response. This review reports on the state of the art of light-emitting metasurfaces, covering both plasmonic and all-dielectric systems.

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Section: Strong Coupling and Excitonic Metasurfacesmentioning

confidence: 99%

Light-emitting metasurfaces

et al. 2019

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“…The Lorentz model for the permittivity, whilst useful for building intuition, is not ideal for making quantitative scattering and absorption calculations: the approximate semi-classical nature of such a model is rather restrictive. In a previous work we made use of a quantum approach to better simulate the response of the excitonic material [12]. In that work we made use of a two-level quantum model for the permittivity, using the Liouville-von Neumann equation [30] with constant terms in the Lindblad superoperator [31,32] to account for damping due to population decay and dephasing effects in the material.…”

Section: Quantum Modelmentioning

confidence: 99%

“…The rationale for restricting ourselves to these four states is that we are interested in the response of nanoparticles at visible frequencies; the corresponding wavelength of the transition between the highest state considered (|5 ) and the ground state (|0 ) is 463.5 nm, whereas the wavelength of the next such transition (|0 −|7 ) is 393.0 nm, outside the visible range. The fundamental parameters used in the equations above are J = 666.5 meV, ω (1) 01 = 3.417 eV, and µ 0 = 20 D. The dephasing parameters [12] used in the model (following the four-level quantum constraints [?]) are Γ (d) 01 = 18.8 meV, Γ (d) 03 = Γ (d) 05 = 75.1 meV.…”

Section: Quantum Modelmentioning

confidence: 99%

“…These modes have many characteristics in common with those of the better-known surface plasmon-polaritons. Surface exciton-polariton modes have been predicted to show field confinement and field enhancement comparable with plasmonic modes [11,12]. The common attribute that metals and excitonic materials possess is that they exhibit a negative permittivity.…”

Section: Introductionmentioning

confidence: 99%

“…In previous work [12], we used theoretical modelling to demonstrate that polymer nanospheres doped with excitonic dye molecules may support localized surface excitonpolariton (LSEP) modes. However, the single surface topology of the homogeneous nanosphere is somewhat limiting if tuning of the modes is desired.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybridised exciton–polariton resonances in core–shell nanoparticles

Gentile

Barnes

2017

J. Opt.

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The goal of nanophotonics is to control and manipulate light at length scales below the diffraction limit. Typically nanostructured metals are used for this purpose, light being confined by exploiting the surface plasmon-polaritons such structures support. Recently excitonic (molecular) materials have been identified as an alternative candidate material for nanophotonics. Here we use theoretical modelling to explore how hybridisation of surface exciton-polaritons can be achieved through appropriate nanostructuring. We focus on the extent to which the frequency of the hybridised modes can be shifted with respect to the underlying material resonances.

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Polymer‐Bound Supramolecular J‐Aggregates: Optical Properties and Applications

Sorokin

Yefimova

Malyukin

2018

Encyclopedia of Polymer Science and Technology

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Luminescent molecular aggregates, called J‐aggregates, are an interesting example of supramolecular structures with a number of unique spectral properties. Their optical properties are governed by the excitonic nature resulting from high‐order molecular packing in the J‐aggregate chains. The J‐aggregate characteristic feature is the bathochromically shifted narrow excitonic band termed the J‐band. The optical properties of J‐aggregates are markedly distinct from those of the individual molecules forming the aggregate, namely narrow absorption band, high oscillator strength, giant third‐order susceptibility, resonant luminescence, and effective exciton diffusion. Although solutions of J‐aggregates often possess low photostability for practical usage, their solid samples are more convenient, especially different polymer films due to their ease of preparation and availability of application. J‐aggregate formation in polymer films has both advantages and disadvantages: Some spectral characteristics could degrade, whereas composites creation could modify and improve their optical properties. This article aims to demonstrate how the interaction of J‐aggregates with polymers in both solution and solid film state affects their spectral properties. In addition, examples of composites and devices based on polymer‐bound J‐aggregates are discussed.

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Localized exciton–polariton modes in dye-doped nanospheres: a quantum approach

Cited by 18 publications

References 59 publications

Light-emitting metasurfaces

Light-emitting metasurfaces

Hybridised exciton–polariton resonances in core–shell nanoparticles

Polymer‐Bound Supramolecular J‐Aggregates: Optical Properties and Applications

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