Wafer-scale low-cost complementary vertically coupled plasmonic structure for surface-enhanced infrared absorption

Wu, Shaoxiong; Chen, Cheng; Wu, Xihang; Tian, Feng; Ma, Yungui; Xu, Yang; Hu, Huan

doi:10.1016/j.snb.2023.133560

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…Nanoantenna structures supporting LSPR offer a way to break the optical diffraction limit by concentrating light into subwavelengths [6][7][8][9]. The distribution of the electric field depends on the configuration of plasmonic nanoantenna, which typically exhibits strong enhancement and localization on the surface of the antenna, especially at the smaller tips and gaps of dimers or polymers [10][11][12][13][14][15]. In recent years, the enhanced electric filed due to plasmon coupling effect can improve molecular absorption and has been applied to many optical and sensing fields, including surface-enhanced Raman scattering (SERS), surfaced-enhanced fluorescence (SEF) and single molecule detection technology [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Surface-enhanced photoluminescence and Raman spectroscopy of single molecule confined in coupled Au bowtie nanoantenna

Pei,

Peng,

Zhang

et al. 2024

Nanotechnology

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Optical nanoantennas possess broad applications in the fields of photodetection, environmental science, biosensing and nonlinear optics, owing to their remarkable ability to enhance and confine the optical field at the nanoscale. In this article, we present a theoretical investigation of surface-enhanced photoluminescence spectroscopy for single molecules confined within novel Au bowtie nanoantenna, covering a wavelength range from the visible to near-infrared spectral regions. We employ the finite element method to quantitatively study the optical enhancement properties of the plasmonic field, quantum yield, Raman scattering and fluorescence. Additionally, we systematically examine the contribution of nonlocal dielectric response in the gap mode to the quantum yield, aiming to gain a better understanding of the fluorescence enhancement mechanism. Our results demonstrate that altering the configuration of the nanoantenna has a significant impact on plasmonic sensitivity. The nonlocal dielectric response plays a crucial role in reducing the quantum yield and corresponding fluorescence intensity when the gap distance is less than 3 nm. However, a substantial excitation field can effectively overcome fluorescence quenching and enhance the fluorescence intensity. By optimizing nanoantenna configuration, the maximum enhancement of surface-enhanced Raman can be turned to 9 and 10 magnitude orders in the visible and near-infrared regions, and 3 and 4 magnitude orders for fluorescence enhancement, respectively. The maximum spatial resolutions of 0.8 nm and 1.5 nm for Raman and fluorescence are also achieved, respectively. Our calculated results not only provide theoretical guidance for the design and application of new nanoantennas, but also contribute to expanding the range of surface-enhanced Raman and fluorescence technology from the visible to the near-infrared region.

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Section: Introductionmentioning

confidence: 99%

Surface-enhanced photoluminescence and Raman spectroscopy of single molecule confined in coupled Au bowtie nanoantenna

Pei,

Peng,

Zhang

et al. 2024

Nanotechnology

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“…16 In most cases, SEIRAS substrates are achieved through lithographic techniques, such as electron beam lithography (EBL), nanosphere lithography (NSL), photolithography (PL), or colloidal self-assembly (LSA), because they have the capability of producing precise and reproducible patterns of metallic substrates. 17 However, besides being time-consuming, these techniques are extremely expensive. Alternative approaches include nano stencil lithography (NSL), which enables the production of a controlled surface for SEIRAS.…”

mentioning

confidence: 99%

Enhanced label-free detection of proteins on Au nanoparticle micropatterns for surface-enhanced infrared absorption spectroscopy

Hassan,

de Sousa,

Bertaglia

et al. 2024

Chem. Commun.

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Surface-enhanced infrared absorption spectroscopy (SEIRAS) for biochemical analysis: Progress and perspective

Wang,

Xie,

Zhu

et al. 2024

Trends in Environmental Analytical Chemistry

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Wafer-scale low-cost complementary vertically coupled plasmonic structure for surface-enhanced infrared absorption

Cited by 5 publications

References 56 publications

Surface-enhanced photoluminescence and Raman spectroscopy of single molecule confined in coupled Au bowtie nanoantenna

Surface-enhanced photoluminescence and Raman spectroscopy of single molecule confined in coupled Au bowtie nanoantenna

Enhanced label-free detection of proteins on Au nanoparticle micropatterns for surface-enhanced infrared absorption spectroscopy

Surface-enhanced infrared absorption spectroscopy (SEIRAS) for biochemical analysis: Progress and perspective

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