Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays

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Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays. / Guo, Rui; Hakala, Tommi; Törmä, Päivi.

In: Physical Review B, Vol. 95, No. 15, 155423, 13.04.2017, p. 1-11.

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@article{71829f6dbf4447ed8ebec58a3fb69ecc,
title = "Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays",
abstract = "Plasmonic nanoarrays which support collective surface lattice resonances (SLRs) have become an exciting frontier in plasmonics. Compared with the localized surface-plasmon resonance 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 vectors and orientation of the nanoparticle dipole given by the polarization of the incident field. Our experimental measurements show that while square, rectangular, hexagonal, 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.",
keywords = "optics, mesoscale, nanoscale",
author = "Rui Guo and Tommi Hakala and P{\"a}ivi T{\"o}rm{\"a}",
note = "| openaire: EC/FP7/340748/EU//CODE",
year = "2017",
month = "4",
day = "13",
doi = "10.1103/PhysRevB.95.155423",
language = "English",
volume = "95",
pages = "1--11",
journal = "Physical Review B (Condensed Matter and Materials Physics)",
issn = "2469-9950",
publisher = "American Physical Society",
number = "15",

}

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TY - JOUR

T1 - Geometry dependence of surface lattice resonances in plasmonic nanoparticle arrays

AU - Guo, Rui

AU - Hakala, Tommi

AU - Törmä, Päivi

N1 - | openaire: EC/FP7/340748/EU//CODE

PY - 2017/4/13

Y1 - 2017/4/13

N2 - Plasmonic nanoarrays which support collective surface lattice resonances (SLRs) have become an exciting frontier in plasmonics. Compared with the localized surface-plasmon resonance 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 vectors and orientation of the nanoparticle dipole given by the polarization of the incident field. Our experimental measurements show that while square, rectangular, hexagonal, 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.

AB - Plasmonic nanoarrays which support collective surface lattice resonances (SLRs) have become an exciting frontier in plasmonics. Compared with the localized surface-plasmon resonance 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 vectors and orientation of the nanoparticle dipole given by the polarization of the incident field. Our experimental measurements show that while square, rectangular, hexagonal, 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.

KW - optics

KW - mesoscale

KW - nanoscale

UR - http://www.scopus.com/inward/record.url?scp=85017603257&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.95.155423

DO - 10.1103/PhysRevB.95.155423

M3 - Article

VL - 95

SP - 1

EP - 11

JO - Physical Review B (Condensed Matter and Materials Physics)

JF - Physical Review B (Condensed Matter and Materials Physics)

SN - 2469-9950

IS - 15

M1 - 155423

ER -

ID: 9955877