3D printed metamaterial absorbers for mid-infrared surface-enhanced spectroscopy

The resonant nature and geometric scalability make metamaterials an ideal platform for an enhanced light-matter interaction over a broad frequency range. The mid-infrared (IR) spectral range is of great importance for vibrational spectroscopy of molecules, while IR metamaterials created from lithography-based planar nanostructures have been used to demonstrate enhanced molecular detection. Compared with visible and near-infrared, the relative long wavelengths of IR light make it possible to achieve three-dimensional (3D) IR metamaterials via the state-of-the-art 3D fabrication techniques. Here, we design and fabricate a 3D printed plasmonic metamaterial absorber (MMA), and by performing Fourier-transform IR spectroscopy, we demonstrate that a series of molecular fingerprint vibrations of glycine can be significantly enhanced by the high absorption mode supported by the 3D meta-atoms of the MMA. The observed enhanced IR detection can also be partially attributed to the improved accessibility offered by the 3D architecture of the MMA. In particular, due to capillary forces during the drying process, the microscale 3D printed features lead to selective analyte deposition in high-field regions, which provides another degree of freedom in the design of the 3D printed structures for surface-enhanced IR detection. Our study shows the flexibility of metastructures based on advanced 3D printing technology in tailoring the interaction between IR light and materials on a subwavelength scale.

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Work Title 3D printed metamaterial absorbers for mid-infrared surface-enhanced spectroscopy
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Open Access
Creators
  1. Albanie K. Hendrickson-Stives
  2. Lei Kang
  3. Nicole R. Donahue
  4. Christine D. Keating
  5. Douglas Henry Werner
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Applied Physics Letters
Publication Date May 11, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1063/5.0093332
Deposited July 19, 2022

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Version 1
published

  • Created
  • Added 3DPrintedAbsorber_PSUopenAccess.pdf
  • Added Creator Albanie K. Hendrickson-Stives
  • Added Creator Lei Kang
  • Added Creator Nicole R. Donahue
  • Added Creator Christine D. Keating
  • Added Creator Douglas Henry Werner
  • Published
  • Updated Publication Date Show Changes
    Publication Date
    • 2022-05-09
    • 2022-05-11