Excitonic surface lattice resonances

Humphrey, Alastair D.; Gentile, Martin J.; Barnes, William

doi:10.1088/2040-8978/18/8/085004

Cited by 15 publications

(12 citation statements)

References 39 publications

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“…To resemble the real system, we first carefully measured the permittivity of nonstructured thin TDBC films using ellipsometry, for three different thicknesses and five different angles (see Figure S6 , Supporting Information for the ellipsometric raw data). By contrast to previously reported TDBC systems, [ 12 , 16 , 17 , 18 , 19 ] the results revealed that the material permittivity of our TDBC films is strongly anisotropic (Figure 3b ). While the in‐plane permittivity components ( ε xy ) are in accordance with a typical Lorentzian type exciton resonance (Equation ( 1 )), the out‐of‐plane permittivity ( ε z ) showed almost no resonant features and positive values in the whole measured spectral range (see Figure S7 , Supporting Information for wider spectral range and enlarged out‐of‐plane permittivity).…”

Section: Resultscontrasting

confidence: 99%

Organic Anisotropic Excitonic Optical Nanoantennas

Kang

Jeon

et al. 2022

Advanced Science

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Optical nanoantennas provide control of light at the nanoscale, which makes them important for diverse areas ranging from photocatalysis and flat metaoptics to sensors and biomolecular tweezing. They have traditionally been limited to metallic and dielectric nanostructures that sustain plasmonic and Mie resonances, respectively. More recently, nanostructures of organic J‐aggregate excitonic materials have been proposed capable of also supporting nanooptical resonances, although their advance has been hampered from difficulty in nanostructuring. Here, the authors present the realization of organic J‐aggregate excitonic nanostructures, using nanocylinder arrays as model system. Extinction spectra show that they can sustain both plasmon‐like resonances and dielectric resonances, owing to the material providing negative and large positive permittivity regions at the different sides of its exciton resonance. Furthermore, it is found that the material is highly anisotropic, leading to hyperbolic and elliptic permittivity regions. Nearfield analysis using optical simulation reveals that the nanostructures therefore support hyperbolic localized surface exciton resonances and elliptic Mie resonances, neither of which has been previously demonstrated for this type of material. The anisotropic nanostructures form a new type of optical nanoantennas, which combined with the presented fabrication process opens up for applications such as fully organic excitonic metasurfaces.

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Section: Resultscontrasting

confidence: 99%

Organic Anisotropic Excitonic Optical Nanoantennas

Kang

Jeon

et al. 2022

Advanced Science

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“…The strength of the two modes can be brought into balance by careful selection of the core index. These findings add to the increasing number of nanostructures that support interesting excitonpolariton resonances such as Tamm modes [44], and excitonic surface lattice-resonances [45] and help to highlight the potential of these molecular nanophotonic systems. We note that hybridisation is also possible in planar (2D) molecular systems, and it might be interesting to consider whether molecular membranes, either naturally occurring or synthetic, might support excitonic-polariton modes.…”

Section: Discussionmentioning

confidence: 79%

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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“…These data showed that grating-induced effects and symmetrical/asymmetrical environments could play an important role in the optical response of regular arrays of nonplasmonic nanoparticles. Lattice resonances have also been predicted for arrays of particles that support exciton-polariton modes, thus opening a pathway to the exploitation of lattice effects in organic material systems …”

Section: Factors Influencing the Properties And Excitation Of Surface...mentioning

confidence: 99%

“…Lattice resonances have also been predicted for arrays of particles that support exciton-polariton modes, thus opening a pathway to the exploitation of lattice effects in organic material systems. 136 …”

Section: Factors Influencing the Properties And Excitation Of Surfacementioning

confidence: 99%

Plasmonic Surface Lattice Resonances: A Review of Properties and Applications

et al. 2018

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When metal nanoparticles are arranged in an ordered array, they may scatter light to produce diffracted waves. If one of the diffracted waves then propagates in the plane of the array, it may couple the localized plasmon resonances associated with individual nanoparticles together, leading to an exciting phenomenon, the drastic narrowing of plasmon resonances, down to 1–2 nm in spectral width. This presents a dramatic improvement compared to a typical single particle resonance line width of >80 nm. The very high quality factors of these diffractively coupled plasmon resonances, often referred to as plasmonic surface lattice resonances, and related effects have made this topic a very active and exciting field for fundamental research, and increasingly, these resonances have been investigated for their potential in the development of practical devices for communications, optoelectronics, photovoltaics, data storage, biosensing, and other applications. In the present review article, we describe the basic physical principles and properties of plasmonic surface lattice resonances: the width and quality of the resonances, singularities of the light phase, electric field enhancement, etc. We pay special attention to the conditions of their excitation in different experimental architectures by considering the following: in-plane and out-of-plane polarizations of the incident light, symmetric and asymmetric optical (refractive index) environments, the presence of substrate conductivity, and the presence of an active or magnetic medium. Finally, we review recent progress in applications of plasmonic surface lattice resonances in various fields.

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Excitonic surface lattice resonances

Cited by 15 publications

References 39 publications

Organic Anisotropic Excitonic Optical Nanoantennas

Organic Anisotropic Excitonic Optical Nanoantennas

Hybridised exciton–polariton resonances in core–shell nanoparticles

Plasmonic Surface Lattice Resonances: A Review of Properties and Applications

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