Three-dimensional cavity-coupled metamaterials for plasmonic color and real-time colorimetric biosensors

Zhu, Jia; Lin, Guanzhou; Huang, Yun; Zhang, Kenan; Wu, Meizhang; Wu, Wengang; Lu, Pei-Min

doi:10.1039/c9nr10343k

Cited by 17 publications

(13 citation statements)

References 36 publications

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“…78 Another interesting application is colorimetric sensing. [194][195][196][197][198][199][200][201] Structural color elements can be designed such that they visually respond to different external stimuli such as temperature, chemicals, and humidity through the use of suitable materials in an optically resonant system. [202][203][204][205][206][207][208][209][210][211][212][213] The benefit of colorimetric sensing is in realizing passive devices that are untethered to an energy source.…”

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confidence: 99%

Nanophotonic Structural Colors

et al. 2020

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Structural colors traditionally refer to colors arising from the interaction of light with structures with periodicities on the order of the wavelength. Recently, the definition has been broadened to include colors arising from individual resonators that can be subwavelength in dimension, e.g., plasmonic and dielectric nanoantennas. For instance, diverse metallic and dielectric nanostructure designs have been utilized to generate structural colors based on various physical phenomena, such as localized surface plasmon resonances (LSPRs), Mie resonances, thin-film Fabry-Pérot interference, and Rayleigh-Wood diffraction anomalies from 2D periodic lattices and photonic crystals. Here, we provide our perspective of the key application areas where structural colors really shine, and other areas where more work is needed. We review major classes of materials and structures employed to generate structural coloration and highlight the main physical resonances involved.

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confidence: 99%

Nanophotonic Structural Colors

et al. 2020

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“… 29 3D split ring 280 300 Ref. 31 3D Gold disk with aluminum pillars 556 683.5* Note that * indicated experimentally measured sensitivity. …”

Section: Fabrication and Measurementmentioning

confidence: 99%

“…Still, the hot spot would concentrate within the dielectric layers of the MPAs, thus hindering the full interaction between analytes and hot spots. The sensitivity of the planar MPAs are ranged around 225–1000 nm/RIU 8 , 23 , 24 ; to solve this issue, some researchers proposed three dimensional metamaterials that provide a hot spot within air 22 , 25 – 31 ; alternatively, researchers proposed a micro/nano-fluidic integrated MPA to locate the hots spots within the fluidic channel where analytes could fully interact with hot spots 32 – 35 . The authors also employed Fano-resonance induced by coupling between molecular absorption and resonance absorption from metamaterials to enhance its sensitivity and detection limit 35 , 36 .…”

Section: Introductionmentioning

confidence: 99%

Creating hot spots within air for better sensitivity through design of oblique-wire-bundle metamaterial perfect absorbers

Huang

2022

Sci Rep

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Better sensitivity of a biosensor could boost up the detection limit of analytes, thus a must in the fields of bio-sensing and bio-detection. To further enhance the sensitivity of a biosensor, in this work, we design an oblique-flat-sheet metamaterial perfect absorber (MPA) to concentrate the hot spots within air between the oblique flat sheet and the continuous ground metal, thus enabling fully interaction between analytes and hot spots. The corresponding field distributions in simulation corroborated our assumption and its sensitivity could be up to 1049 nm/RIU. Then, we fabricated the sample by e-beam lithography process for a seed layer and simply tilting the sample during deposition to obtain oblique flat sheets. When considering the stochastic nature of the deposited multiple oblique flat sheets, we modified the metallic upper resonator of the MPA from the single oblique-flat-sheet into randomly distributed oblique-wire-bundle (OWB) and in simulation, its sensitivity is boosted up to 3319 nm/RIU. In experiments, the measured sensitivity is 1329 nm/RIU under different concentrations of glucose solutions that is four times larger than the 330 nm/RIU of the planar MPA. The higher sensitivity was attributed to that the OWB MPA could provide hot spots within air not only between OWB and grounded metal but also among wires. Moreover, the OWB could also trap and concentrate the analytes locally.

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“…The polaritonic modes are then delocalized over many molecules, giving rise to collective effects and effective long-range interactions between spatially separated molecules. 2,3,[16][17][18][19][21][22][23][24][25][26][27][28][29][30][31] While there is a wide range of designs that have been developed for optical light confinement, [69][70][71][72] experiments in polaritonic chemistry have almost exclusively used Fabry-Pérot cavities consisting of two planar mirrors. The mirrors are typically either made of metal or from distributed Bragg reflectors (DBRs, alternating layers of dielectric materials with different refractive indices).…”

Section: Introductionmentioning

confidence: 99%

Theoretical Challenges in Polaritonic Chemistry

Fregoni,

García-Vidal,

Feist

2021

Preprint

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Polaritonic chemistry exploits strong light-matter coupling between molecules and confined electromagnetic field modes to enable new chemical reactivities. In systems displaying this functionality, the choice of the cavity determines both the confinement of the electromagnetic field and the number of molecules that are involved in the process. Whereas in wavelength-scale optical cavities light-matter interaction is ruled by collective effects, plasmonic subwavelength nanocavities allow even single molecules to reach strong coupling. Due to these very distinct situations, a multiscale theoretical toolbox is then required to explore the rich phenomenology of polaritonic chemistry.Within this framework, each component of the system (molecules and electromagnetic modes) needs to be treated in sufficient detail to obtain reliable results. Starting from the very general aspects of light-molecule interactions in typical experimental setups, we underline the basic concepts that should be taken into account when operating in this new area of research. Building on these considerations, we then provide a map of the theoretical tools already available to tackle chemical applications of molecular polaritons at different scales. Throughout the discussion, we draw attention to both

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Three-dimensional cavity-coupled metamaterials for plasmonic color and real-time colorimetric biosensors

Abstract: Three-dimensional cavity-coupled plasmonic metamaterials for high sensitive real-time and colorimetric biosensor.

Cited by 17 publications

References 36 publications

Nanophotonic Structural Colors

Nanophotonic Structural Colors

Creating hot spots within air for better sensitivity through design of oblique-wire-bundle metamaterial perfect absorbers

Theoretical Challenges in Polaritonic Chemistry

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