Surface lattice resonance in three-dimensional plasmonic arrays fabricated via self-assembly of silica-coated gold nanoparticles

Hasegawa, Masashi; Watanabe, Kanako; Namigata, Hikaru; Welling, Tom A.J.; Suga, Kazuyoshi; Nagao, Daisuke

doi:10.1016/j.jcis.2022.11.077

Cited by 6 publications

(6 citation statements)

References 48 publications

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“…The fabrication of this type of arrays is within reach of current experimental technology, as demonstrated by recent works. − For instance, few-layer three-dimensional plasmonic arrays have been obtained by self-assembly of silica-coated gold nanoparticles that, once infiltrated with an index-matching fluid, behave as arrays suspended in a homogeneous environment . Moreover, arrays with unit cells made of metallic nanostructures with different heights, and located at different planes, have been fabricated using an approach based on the binary-pore anodic aluminum oxide template technique …”

Section: Discussionmentioning

confidence: 99%

“…88−90 For instance, few-layer three-dimensional plasmonic arrays have been obtained by self-assembly of silicacoated gold nanoparticles that, once infiltrated with an indexmatching fluid, behave as arrays suspended in a homogeneous environment. 88 Moreover, arrays with unit cells made of metallic nanostructures with different heights, and located at different planes, have been fabricated using an approach based on the binary-pore anodic aluminum oxide template technique. 90 The results of this work provide a strong theoretical understanding of the chiral response of the lattice resonances supported by structurally achiral 2.5-dimensional arrays, and therefore are expected to have far-reaching implications from an application point of view.…”

Section: ■ Conclusionmentioning

confidence: 99%

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Chiral Lattice Resonances in 2.5-Dimensional Periodic Arrays with Achiral Unit Cells

2023

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Lattice resonances are collective electromagnetic modes supported by periodic arrays of metallic nanostructures. These excitations arise from the coherent multiple scattering between the elements of the array and, thanks to their collective origin, produce very strong and spectrally narrow optical responses. In recent years, there has been significant effort dedicated to characterizing the lattice resonances supported by arrays built from complex unit cells containing multiple nanostructures. Simultaneously, periodic arrays with chiral unit cells, made of either an individual nanostructure with a chiral morphology or a group of nanostructures placed in a chiral arrangement, have been shown to exhibit lattice resonances with different responses to right- and left-handed circularly polarized light. Motivated by this, here, we investigate the lattice resonances supported by square bipartite arrays in which the relative positions of the nanostructures can vary in all three spatial dimensions, effectively functioning as 2.5-dimensional arrays. We find that these systems can support lattice resonances with almost perfect chiral responses and very large quality factors, despite the achirality of the unit cell. Furthermore, we show that the chiral response of the lattice resonances originates from the constructive and destructive interference between the electric and magnetic dipoles induced in the two nanostructures of the unit cell. Our results serve to establish a theoretical framework to describe the optical response of 2.5-dimensional arrays and provide an approach to obtain chiral lattice resonances in periodic arrays with achiral unit cells.

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Section: Discussionmentioning

confidence: 99%

Section: ■ Conclusionmentioning

confidence: 99%

Chiral Lattice Resonances in 2.5-Dimensional Periodic Arrays with Achiral Unit Cells

2023

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“…[1][2][3][4][5][6][7][8] Such LSPR is generated by a collective oscillation of conduction electrons of the plasmonic NPs when the frequency of incident photons is resonant with the collective oscillation. [9][10][11] Especially, if the plasmonic NPs are arranged into an ordered periodic structure with specific interparticle spacing, far-field electromagnetic coupling between the LSPR of individual NPs and Bragg diffraction from periodic lattice will occur due to sufficient spectral overlap of the two modes. [12][13][14][15][16][17][18] This plasmonic-diffractive hybrid resonance, characterized as a sharp peak in extinction spectra, is known as surface lattice resonance (SLR).…”

Section: Introductionmentioning

confidence: 99%

“…To produce interparticle distance, plasmonic NPs were first coated with other materials, such as polymers or SiO 2 , to form NP@material composite, and then were utilized for further self-assembly. 11,14,16 The separation distance between plasmonic NPs was adjusted by the thickness of the shell. However, this method required a complicated coating process.…”

Section: Introductionmentioning

confidence: 99%

Surface lattice resonance in an asymmetric air environment of 2D Au near-spherical nanoparticle arrays: impact of nanoparticle size and its sensitivity

Men,

Wang,

Ding

et al. 2024

J. Mater. Chem. C

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“…Self-assembly methods to create 3D colloidal crystals include static and dynamic (confined) convective assembly, − also known as the vertical deposition method, spin coating, shear alignment, , Langmuir–Blodgett, and electrophoretic deposition. , The optical quality of the colloidal assemblies is determined by imperfections in these crystals. These imperfections range from stacking faults, to grain boundaries, and general disorder, which are mostly related to the polydispersity of the particles. − Besides monodisperse particles, it is important to minimize the amount of cracks that are formed in the film for the best optical quality.…”

Section: Introductionmentioning

confidence: 99%

Highly Reflective and Transparent Shell-Index-Matched Colloidal Crystals of Core–Shell Particles for Stacked RGB Films

Welling,

Kurioka,

Namigata

et al. 2023

ACS Appl. Nano Mater.

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Colloidal photonic crystals reflect light of a certain wavelength, according to the distance between the particles. While the reflective properties are good, the transparency is often hampered by multiple incoherent scattering events. This loss of transparency is primarily due to the large size and high scattering cross section of the particles in close-packed opals, especially in the shorter visible wavelength regime. In this work, a one-step vertical deposition method was used to assemble ZnS@SiO 2 core−shell particles within a silica precursor solution to create reflective films with index-matched shells, leading to high transparency. We changed the core particle size and the number of layers to optimize the reflectance and transparency of the films. For small 65 nm core particles, high reflection intensities were difficult to obtain. However, for the 174 nm core particles, incoherent scattering led to decreased transparency. Intermediate sizes were preferred. An optimal film thickness between 2 and 5 μm was determined. If the film thickness was below 2 μm, broad reflection peaks were observed, while thicker films led to a loss of transparency. According to this optimization, red, green, and blue films were created. Last, a stacked RGB film comprising blue, green, and red reflective layers was successfully created by three successive coassembly steps. This was possible due to the high transparency and narrow reflection peak width of each individual coating. These films may have potential as reflective displays and smart windows and in encryption.

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Surface lattice resonance in three-dimensional plasmonic arrays fabricated via self-assembly of silica-coated gold nanoparticles

Cited by 6 publications

References 48 publications

Chiral Lattice Resonances in 2.5-Dimensional Periodic Arrays with Achiral Unit Cells

Chiral Lattice Resonances in 2.5-Dimensional Periodic Arrays with Achiral Unit Cells

Surface lattice resonance in an asymmetric air environment of 2D Au near-spherical nanoparticle arrays: impact of nanoparticle size and its sensitivity

Highly Reflective and Transparent Shell-Index-Matched Colloidal Crystals of Core–Shell Particles for Stacked RGB Films

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