High Figure of Merit (FOM) of Bragg Modes in Au‐Coated Nanodisk Arrays for Plasmonic Sensing

Couture, Maxime; Brulé, Thibault; Laing, Stacey; Cui, Wenli; Sarkar, Mitradeep; Charron, Benjamin; Faulds, Karen; Peng, Wei; Canva, Michael; Masson, Jean-François

doi:10.1002/smll.201700908

Cited by 22 publications

(19 citation statements)

References 85 publications

(101 reference statements)

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“…The figure of merit ( FOM = S / FWHM ) was also excellent at 40 RIU −1 (green line). Coincidentally, the results of the evaluating sensing performance were close to that of the gold-coated nanodisk arrays in our previous reported research [17]. For comparison, the RI responses of square and honeycomb-like structures were also calculated and presented in Figure 2c–f.…”

Section: Resultssupporting

confidence: 81%

“…Complex nanostructures with nanodisks embedded in gold film have been proposed to improve sensing [16]. With these types of structures, the full width at half maximum (FWHM) has been measured at 13–14 nm [17]. Layered nanostructures consisting of gold, SiO 2 and over-coated with either asymmetric elliptical nanodisk arrays or square nanodisk arrays have been proposed for near-perfect absorption in the infrared range [15,18].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Nanodisk Film for Ultra-Narrowband Filtering, Near-Perfect Absorption and Wide Range Sensing

Cui

Peng

et al. 2019

Nanomaterials

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The miniaturization and integration of photonic devices are new requirements in the novel optics field due to the development of photonic information technology. In this paper, we report that a multifunctional layered structure of Au, SiO2 and hexagonal nanodisk film is advantageous for ultra-narrowband filtering, near-perfect absorption and sensing in a wide refractive index (RI) region. This hexagonal nanostructure presented two remarkable polarization independent plasmon resonances with near-zero reflectivity and near-perfect absorptivity under normal incidence in the visible and near-infrared spectral ranges. The narrowest full width at half maximum (FWHM) of these resonances was predicted to be excellent at 5 nm. More notably, the double plasmon resonances showed extremely obvious differences in RI responses. For the first plasmon resonance, an evident linear redshift was observed in a wide RI range from 1.00 to 1.40, and a high RI sensitivity of 600 nm/RIU was obtained compared to other plasmonic nanostructures, such as square and honeycomb-like nanostructures. For the second plasmon resonance with excellent FWHM at 946 nm, its wavelength position almost remained unmovable in the case of changing RI surrounding nanodisks in the same regime. Most unusually, its resonant wavelength was insensitive to nearly all structural parameters except the structural period. The underlying physical mechanism was analyzed in detail for double plasmon resonances. This work was significant in developing high-performance integrated optical devices for filtering, absorbing and biomedical sensing.

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Section: Resultssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Hybrid Nanodisk Film for Ultra-Narrowband Filtering, Near-Perfect Absorption and Wide Range Sensing

Cui

Peng

et al. 2019

Nanomaterials

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“…Meanwhile, the wavelength variation tendency of the resonance dip at λ 2 showed an opposite trend as the incident light angle increased. The nature of the resonance dip at λ 2 was attributed to the (1, 0) surface plasmon polariton Bloch mode, which was prone to be excited by large incidence angle . As shown in Figure S3 (Supporting Information), the decay length of the resonance dip at λ 2 was smaller than that of resonance dip at λ 1 , thus implying that the resonance dip at λ 2 had a stronger near‐field localization.…”

Section: Resultsmentioning

confidence: 97%

Large‐Scale Plasmonic Nanodisk Structures for a High Sensitivity Biosensing Platform Fabricated by Transfer Nanoprinting

Liang

Cui

et al. 2019

Advanced Optical Materials

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safety, and environmental monitoring, owing to their stronger near-field confined capacity on the surface, as compared with that of prism-based metallic film sensors. [1][2][3][4][5][6][7][8][9][10][11] Moreover, surface plasmon resonance (SPR) in plasmonic nanostructures can be directly excited by using simple free-space incident light instead of complex and bulky optical prism excitation systems, which exhibits great potential for developing ultracompact and multiplexed sensing applications. [12][13][14][15] Many efforts have been focused on engineering the topography and materials of nanostructures to improve their sensitivity and to realize portable sensing applications, such as nanoholes, [16][17][18] nanodisks, [19][20][21] nanorings, [22,23] and nanomushroom arrays. [24] To date, most plasmonic nanostructure sensors have been fabricated by lithography-based top-down nanofabrication technologies, for example, focused ion beam milling [25,26] and electron beam lithography. [19][20][21][22][23][24] Although they have high preparation precision, good stability, and repeatability, these top-down nanofabrication technologies suffer from some inherent shortcomings, such as high equipment cost, time-consuming fabrication, low yields, and small footprint sizes (usually limited to below 100 µm × 100 µm), which severely restrict the practical applications of plasmonic nanostructure sensors. In addition, because of the abovementioned small sensor footprint, the angle-dependent sensing properties are relatively less studied. [27][28][29] To overcome these drawbacks, bottom-up nanofabrication technologies, such as nanosphere lithography and tunable holographic lithography, are used to generate large-scale ordered nanostructure arrays with low cost and facile fabrication. [30,31] However, large-scale fabrication approaches are mainly used to fabricate sunken nanostructures, such as nanoholes or nanogrooves. [28,31,32] The relatively low sensing capabilities of sunken nanostructures make them uncompetitive with those of prism-based SPR sensors. Therefore, there is an urgent demand for the realization of large-scale, low cost biosensors with convex nanostructures, such as large scale fabrication of nanostructures by laserinduced dewetting and laser ablation methods. [33,34] In this paper, we reported a centimeter-scale, convex plasmonic nanostructure as a sensing platform fabricated by low cost transfer nanoprinting and based on an ultrathin anodic Surface plasmon resonance in plasmonic nanostructures has become a powerful analytical tool in ultrasensitive label-free biomolecule sensing. However, the fabrication of plasmonic nanostructure sensors relies on lithography-based top-down nanofabrication approaches, which have inherent shortcomings, such as high manufacturing cost, time-consuming fabrication, and a small fabrication footprint. In particular, the small footprint of fabricated plasmonic nanostructures has significantly restrained the study of their angle-dependent sensitivity. Here, a centimeter-scale, high sensit...

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“…The dependence of the plasmonic and Mie resonance frequencies on the refractive index of a surrounding medium (like a solvent or human serum) is ideal for sensing applications. The figure of merit (FoM) of such sensors is commonly defined as the resonance shift (spectral sensitivity, S ) upon a change in the refractive index of the surrounding dielectric normalized by the resonance line width (Δλ)

FoM = \frac{S}{Δ λ}

…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Spectroscopy and Biosensing with Optically Resonant Dielectric Nanostructures

Krasnok

Caldarola

Bonod

et al. 2018

Advanced Optical Materials

137

123

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Resonant dielectric nanoparticles made of materials with large positive dielectric permittivity, such as Si, GaP, GaAs, have become a powerful platform for modern light science, enabling various fascinating applications in nanophotonics and quantum optics. In addition to light localization at the nanoscale, dielectric nanostructures provide electric and magnetic resonant responses throughout the visible and infrared spectrum, low dissipative losses and optical heating, low doping effect, and absence of quenching, which are interesting for spectroscopy and biosensing applications. This review presents state‐of‐the‐art applications of optically resonant high‐index dielectric nanostructures as a multifunctional platform for light–matter interactions. Nanoscale control of quantum emitters and applications for enhanced spectroscopy including fluorescence spectroscopy, surface‐enhanced Raman scattering, biosensing, and lab‐on‐a‐chip technology are surveyed. The theoretical background underlying these effects is described, realizations of specific resonant dielectric nanostructures and hybrid excitonic systems are overviewed, and an outlook of the challenges in this field, which remain open to future research, is provided.

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High Figure of Merit (FOM) of Bragg Modes in Au‐Coated Nanodisk Arrays for Plasmonic Sensing

Cited by 22 publications

References 85 publications

Hybrid Nanodisk Film for Ultra-Narrowband Filtering, Near-Perfect Absorption and Wide Range Sensing

Hybrid Nanodisk Film for Ultra-Narrowband Filtering, Near-Perfect Absorption and Wide Range Sensing

Large‐Scale Plasmonic Nanodisk Structures for a High Sensitivity Biosensing Platform Fabricated by Transfer Nanoprinting

Spectroscopy and Biosensing with Optically Resonant Dielectric Nanostructures

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