Narrow plasmon resonances in diffractive arrays of gold nanoparticles in asymmetric environment: Experimental studies

Nikitin, Andrey G.; Nguyen, Tuyen Duong Thanh; Dallaporta, H.

doi:10.1063/1.4803535

Cited by 61 publications

(48 citation statements)

References 23 publications

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“…Schatz et al [11,12] have first suggested that these narrow resonances are possible in regular arrays of NPs, while Markel has elaborated the theory [13]. Several experimental verifications have also been provided [14][15][16][17][18][19][20][21][22][23], and considering the very narrow linewidth achievable (few nanometers), results hold promises for many applications in lasing, sensing, and metamaterials [24]. An interesting possibility is to study the coupling between diffractive and plasmon modes in the condition λ RA < λ LSP .…”

Section: Introductionmentioning

confidence: 99%

Angular plasmon response of gold nanoparticles arrays: approaching the Rayleigh limit

et al. 2016

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Abstract:The regular arrangement of metal nanoparticles influences their plasmonic behavior. It has been previously demonstrated that the coupling between diffracted waves and plasmon modes can give rise to extremely narrow plasmon resonances. This is the case when the singleparticle localized surface plasmon resonance (λ LSP ) is very close in value to the Rayleigh anomaly wavelength (λ RA ) of the nanoparticles array. In this paper, we performed angle-resolved extinction measurements on a 2D array of gold nano-cylinders designed to fulfil the condition λ RA < λ LSP . Varying the angle of excitation offers a unique possibility to finely modify the value of λ RA , thus gradually approaching the condition of coupling between diffracted waves and plasmon modes. The experimental observation of a collective dipolar resonance has been interpreted by exploiting a simplified model based on the coupling of evanescent diffracted waves with plasmon modes. Among other plasmon modes, the measurement technique has also evidenced and allowed the study of a vertical plasmon mode, only visible in TM polarization at off-normal excitation incidence. The results of numerical simulations, based on the periodic Green's tensor formalism, match well with the experimental transmission spectra and show fine details that could go unnoticed by considering only experimental data.

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Section: Introductionmentioning

confidence: 99%

Angular plasmon response of gold nanoparticles arrays: approaching the Rayleigh limit

et al. 2016

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“…The beam spot on the sample was reduced to a diameter of 30 µm by inserting a pinhole aperture between the light source and the condenser, thereby giving a beam divergence of less than 1 deg. The arrays were then index matched with oil (n = 1.515) [31,32] and the transmitted light collected with an oil immersion lens (NA of 1.25). A long-pass filter (cutoff 500 nm) was inserted in the optical path after the collection objective to remove higher diffracted orders.…”

Section: Characterizationmentioning

confidence: 99%

Plasmonic surface lattice resonances on arrays of different lattice symmetry

2014

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Arrays of metallic particles may exhibit optical collective excitations known as surface lattice resonances (SLRs). These SLRs occur near the diffraction edge of the array and can be sharper than the plasmon resonance associated with the isolated single particle response. We have fabricated and modeled arrays of silver nanoparticles of different geometries. We show that square, hexagonal, and honeycomb arrays show similar SLRs; no one geometry shows a clear advantage over the others in terms of resonance linewidth. We investigate the nature of the coupling between the particles by looking at rectangular arrays. Our results combine experiment and modeling based on a simple coupled-dipole model.

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“…As the radius of SPA decreases to 65 nm, the central wavelength of CR has a blue shift to 874 nm. Furthermore, when the central wavelength of CR approaches geometric resonant wavelength, the coupling effects lead to a significant narrowing of the reflection lineshape which has been studied both theoretically and experimentally [27,28]. Geometric resonant wavelength can be calculated by λ G =n·P, indicated by red dash line in Fig.…”

Section: Formation Of Fano Resonance In Bspamentioning

confidence: 98%

Sharp Fano Resonance within Bi-periodic Silver Particle Array and Its Application as Plasmonic Sensor with Ultra-high Figure of Merit

Zhao

Jiang

2014

Plasmonics

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In this research paper, a new type of Fano resonance originating from the far-field interference of lattice collective resonances of two sets of interlacing silver particle arrays with different radii is investigated numerically. The anti-phased collective resonance of the two arrays acts as "dark state", while the phased one serves as "bright state". The structure has the advantage to achieve both high modulation depth and sharp linewidth simultaneously, which is very attractive for plasmonic sensor, and the sensitivity and figure of merit can reach as high as 633 nm/RIU and 2000, respectively. Also, the structure has the merit of high Q factor up to 320.

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Narrow plasmon resonances in diffractive arrays of gold nanoparticles in asymmetric environment: Experimental studies

Cited by 61 publications

References 23 publications

Angular plasmon response of gold nanoparticles arrays: approaching the Rayleigh limit

Angular plasmon response of gold nanoparticles arrays: approaching the Rayleigh limit

Plasmonic surface lattice resonances on arrays of different lattice symmetry

Sharp Fano Resonance within Bi-periodic Silver Particle Array and Its Application as Plasmonic Sensor with Ultra-high Figure of Merit

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