Fano Resonant Aluminum Nanoclusters for Plasmonic Colorimetric Sensing

King, N.S.P.; Liu, Lifei; Yang, Xiao; Cerjan, Benjamin; Everitt, Henry O.; Nordlander, Peter; Halas, Naomi J.

doi:10.1021/acsnano.5b04864

Cited by 223 publications

(187 citation statements)

References 48 publications

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“…This analysis directly leads to the quantitative estimation of the temperature increase in the direct vicinity of an Al structure which is in excellent agreement with measured ∆T. For a moderate excitation power, the relative temperature increase for a specific excitation location can reach [15][16][17][18][19][20] • C at a vertical distance of 150 nm in the surrounding. The spectral overlapping of high order SP resonances with the interband transitions in such aluminum objects results in a controlled heat generation and corresponding on-demand temperature increase in the near field.…”

Section: Resultssupporting

confidence: 73%

Local field enhancement and thermoplasmonics in multimodal aluminum structures

et al. 2017

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Aluminum nanostructures have recently been at the focus of numerous studies due to their properties including oxidation stability and surface plasmon resonances covering the ultraviolet and visible spectral windows. In this article, we reveal a new facet of this metal relevant for both plasmonics purpose and photo-thermal conversion. The field distribution of high order plasmonic resonances existing in two-dimensional Al structures is studied by nonlinear photoluminescence (nPL) microscopy in a spectral region where electronic interband transitions occur. The polarization sensitivity of the field intensity maps shows that the electric field concentration can be addressed and controlled ondemand. We use a numerical tool based on the Green dyadic method to analyze our results and to simulate the absorbed energy that is locally converted into heat. The polarization-dependent temperature increase of the Al structures is experimentally quantitatively measured, and is in an excellent agreement with theoretical predictions. Our work highlights Al as a promising candidate for designing thermal nanosources integrated in coplanar geometries for thermally assisted nanomanipulation or biophysical applications.Metallic nanostructures sustain localized and delocalized Surface Plasmon (SP) resonances when they are excited under specific conditions. These resonances are giving rise to large enhancement of the electromagnetic field, subwalength confinement, and plasmon propagation in structures with low dimensionalities 1,2 . Owing to their remarkable optical properties, SP resonances have led to a large number of direct applications including high-precision biological sensing 3 , light manipulation by metasurfaces 4 , design of integrated devices for information processing 5 , and highly localized heat sources 6,7 . Due to the large negative real part of the dielectric function in the visible spectrum, gold or silver, either as lithographed patterns or as colloidal nanoparticles, represent the bulk of plasmonic devices so far. Although both metals exhibit complementary features that have fostered the fast development of plasmonics as a technology, these two noble metals also suffer from drawbacks; namely bulk oxidation for silver and an important interband absorption for gold at energies above 2.25 eV. Moreover, both are expensive materials limiting their systematic and massive use in commercial systems. These considerations triggered a rising interest for non-conventional plasmonic materials 8,9 . In this context, while discarded for a long time for plasmonic applications due to its high losses in the red part of the visible spectrum, aluminum has recently demonstrated its potential for applications in the blue-ultraviolet energy range 1,[10][11][12][13][14][15][17][18][19][20] . The main asset of Al over other noble metals stems mainly from a * Corresponding author: aurelien.cuche@cemes.fr plasma frequency ω p situated at a higher energy. In addition to its intrinsic electronic properties, the optical response of aluminum is ...

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Section: Resultssupporting

confidence: 73%

Local field enhancement and thermoplasmonics in multimodal aluminum structures

et al. 2017

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“…The quality factor (resonant wavelength/line width) of the system was 152 (473 nm/3.1 nm). The obtained FOM is higher than that of the previously reported FOM in nanostructure-based aluminum sensors1516174142, the FOM value (108) of the gold mushroom arrays11 and the theoretically estimated upper limits (FOM = 108) of the ATR-coupling SPR sensors43. We also tested the bulk sensitivity of capped nanoslits with different ridge height (H = 35) as shown in Fig.…”

Section: Resultsmentioning

confidence: 73%

Highly Sensitive Aluminum-Based Biosensors using Tailorable Fano Resonances in Capped Nanostructures

Lee

Hsu

You

et al. 2017

Sci Rep

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Metallic nanostructure-based surface plasmon sensors are capable of real-time, label-free, and multiplexed detections for chemical and biomedical applications. Recently, the studies of aluminum-based biosensors have attracted a large attention because aluminum is a more cost-effective metal and relatively stable. However, the intrinsic properties of aluminum, having a large imaginary part of the dielectric function and a longer evanescent length, limit its sensing capability. Here we show that capped aluminum nanoslits fabricated on plastic films using hot embossing lithography can provide tailorable Fano resonances. Changing height of nanostructures and deposited metal film thickness modulated the transmission spectrum, which varied from Wood’s anomaly-dominant resonance, asymmetric Fano profile to surface plasmon-dominant resonance. For biolayer detections, the maximum surface sensitivity occurred at the dip of asymmetric Fano profile. The optimal Fano factor was close to −1.3. The wavelength and intensity sensitivities for surface thickness were up to 2.58 nm/nm and 90%/nm, respectively. The limit of detection (LOD) of thickness reached 0.018 nm. We attributed the enhanced surface sensitivity for capped aluminum nanoslits to a reduced evanescent length and sharp slope of the asymmetric Fano profile. The protein-protein interaction experiments verified the high sensitivity of capped nanostructures. The LOD was down to 236 fg/mL.

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“…As a result, such PSG color filter possesses a conspicuous spectral sensitivity to changes in the ambient environment [6,37,38]. We demonstrated this by fabricating three PSGs with the same period of 300 nm and coating these samples with different dielectric layers with a thickness of 35 nm as shown in Figure 5A.…”

Section: Resultsmentioning

confidence: 96%

Color display and encryption with a plasmonic polarizing metamirror

Song

et al. 2017

Nanophotonics

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Abstract:Structural colors emerge when a particular wavelength range is filtered out from a broadband light source. It is regarded as a valuable platform for color display and digital imaging due to the benefits of environmental friendliness, higher visibility, and durability. However, current devices capable of generating colors are all based on direct transmission or reflection. Material loss, thick configuration, and the lack of tunability hinder their transition to practical applications. In this paper, a novel mechanism that generates high-purity colors by photon spin restoration on ultrashallow plasmonic grating is proposed. We fabricated the sample by interference lithography and experimentally observed full color display, tunable color logo imaging, and chromatic sensing. The unique combination of high efficiency, highpurity colors, tunable chromatic display, ultrathin structure, and friendliness for fabrication makes this design an easy way to bridge the gap between theoretical investigations and daily-life applications.

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Fano Resonant Aluminum Nanoclusters for Plasmonic Colorimetric Sensing

Cited by 223 publications

References 48 publications

Local field enhancement and thermoplasmonics in multimodal aluminum structures

Local field enhancement and thermoplasmonics in multimodal aluminum structures

Highly Sensitive Aluminum-Based Biosensors using Tailorable Fano Resonances in Capped Nanostructures

Color display and encryption with a plasmonic polarizing metamirror

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