Plasmonic surface lattice resonances on arrays of different lattice symmetry

Humphrey, Alastair D.; Barnes, William

doi:10.1103/physrevb.90.075404

Cited by 188 publications

(224 citation statements)

References 34 publications

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“…Such -point inequality has been reported in [28], where the authors have measured the zero-angle extinction spectra for rectangular lattice arrays and found different peak positions for different polarizations, noticing that the important distance is the particle separation in the direction perpendicular to the incident electric field. Here, we point out the origin of this phenomenon: it naturally arises from the general framework we propose for determining and quantifying the SLR modes in different lattice geometries.…”

Section: B Rectangular Latticementioning

confidence: 60%

Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays

2017

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Plasmonic nanoarrays which support collective surface lattice resonances (SLRs) have become an exciting frontier in plasmonics. Compared with the localized surface plasmon resonance (LSPR) in individual particles, these collective modes have appealing advantages such as angle-dependent dispersions and much narrower linewidths. Here, we investigate systematically how the geometry of the lattice affects the SLRs supported by metallic nanoparticles. We present a general theoretical framework from which the various SLR modes of a given geometry can be straightforwardly obtained by a simple comparison of the diffractive order (DO) vectors and orientation of the nanoparticle dipole given by the polarization of the incident field. Our experimental measurements show that while square, hexagonal, rectangular, honeycomb and Lieb lattice arrays have similar spectra near the Γ-point (k = 0), they have remarkably different SLR dispersions. Furthermore, their dispersions are highly dependent on the polarization. Numerical simulations are performed to elucidate the field profiles of the different modes. Our findings extend the diversity of SLRs in plasmonic nanoparticle arrays, and the theoretical framework provides a simple model for interpreting the SLRs features, and vice versa, for designing the geometrical patterns.

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Section: B Rectangular Latticementioning

confidence: 60%

Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays

2017

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“…The energy dispersions and quality factors of these SLRs can be tailored by varying the geometrical parameters and energy detuning between RAs and LSP resonances [29,30]. In addition, the enhanced in-plane radiative coupling reduces the radiative losses associated with localized resonances [31], and the redistribution of the electromagnetic field around the particles also reduces Ohmic losses [32], creating narrow resonances with high quality factors [31,33,34].…”

Section: Resultsmentioning

confidence: 99%

Plasmon-exciton-polariton lasing

Ramezani¹,

Halpin²,

Fernández‐Domínguez³

et al. 2016

Optica

236

256

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Metallic nanostructures provide a toolkit for the generation of coherent light below the diffraction limit. Plasmonicbased lasing relies on the population inversion of emitters (such as organic fluorophores) along with feedback provided by plasmonic resonances. In this regime, known as weak light-matter coupling, the radiative characteristics of the system can be described by the Purcell effect. Strong light-matter coupling between the molecular excitons and electromagnetic field generated by the plasmonic structures leads to the formation of hybrid quasi-particles known as plasmon-exciton-polaritons (PEPs). Due to the bosonic character of these quasi-particles, exciton-polariton condensation can lead to laser-like emission at much lower threshold powers than in conventional photon lasers. Here, we observe PEP lasing through a dark plasmonic mode in an array of metallic nanoparticles with a low threshold in an optically pumped organic system. Interestingly, the threshold power of the lasing is reduced by increasing the degree of light-matter coupling in spite of the degradation of the quantum efficiency of the active material, highlighting the ultrafast dynamic responsible for the lasing, i.e., stimulated scattering. These results demonstrate a unique roomtemperature platform for exploring the physics of exciton-polaritons in an open-cavity architecture and pave the road toward the integration of this on-chip lasing device with the current photonics and active metamaterial planar technologies.

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“…Early works [13,14,15,16,17,18,19] focussed on particle plasmon resonances that had dipole moments in the plane of the array. SLRs based on out-of-plane dipole moments have also been investigated using oblique angle of incidence excitation [19,20] and by employing a more complex particle shape [21].…”

Section: Introductionmentioning

confidence: 99%

“…We fabricated one-and two-particle basis square arrays of silver nanoparticles using electron-beam lithography (EBL) (details are given elsewhere [18]). We probed the optical response of our samples using normal-incidence extinction micro-spectroscopy and used our measurements to determine the extinction cross-section of the particles in the array.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic surface lattice resonances in arrays of metallic nanoparticle dimers

Humphrey

Barnes

2016

J. Opt.

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Abstract. We investigate the optical response of square arrays of metallic nanoparticles where each lattice site is occupied by two particles, a dimer. In particular we examine the surface lattice resonances arising in these structures when the inplane dipole moments associated with the plasmon modes of the nanoparticles couple together. The addition of a second particle to the basis leads to a more complex optical response, one that is anisotropic in the plane of the array. Extinction spectra are recorded at normal incidence for different orientations of the incident electric field. We compare our experimentally derived data with those from a coupled-dipole model. We show how the separation between the particles that comprise the dimer helps determine the overall response of the system.

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Plasmonic surface lattice resonances on arrays of different lattice symmetry

Cited by 188 publications

References 34 publications

Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays

Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays

Plasmon-exciton-polariton lasing

Plasmonic surface lattice resonances in arrays of metallic nanoparticle dimers

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