Large-area cost-effective lithography-free infrared metasurface absorbers for molecular detection
Source abstract
Abstract
The implementation of metasurface absorbers for advanced sensing applications in the infrared spectral range is gaining prominence. Nevertheless, scale-up is challenging because their subwavelength features require complex fabrication techniques. Here, we present centimeter-sized nanostructured metasurface absorbers, prepared using the nanoporous anodic aluminum oxide template method, which exhibit a high and polarization-insensitive absorptivity at near-infrared wavelengths. Their sensing potential as surface-enhanced Raman spectroscopy substrates is demonstrated by analyzing Raman spectra of methyl parathion pesticides at concentrations as low as 100 ppb. Our results offer a stable, cost-effective, scalable, and uniform solution for metasurface-based molecular detection applications with a high sensitivity.
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Research context
OpenAlex topics: Metamaterials and Metasurfaces Applications · Plasmonic and Surface Plasmon Research · Thermal Radiation and Cooling Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Materials Science, Vietnam Academy of Science and Technology 1 , Hanoi, Vietnam
Graduate University of Science and Technology, Vietnam Academy of Science and Technology 2 , Hanoi, Vietnam
Laboratory of Solid State Physics and Magnetism, Department of Physics and Astronomy, KU Leuven 3 , Leuven B-3001, Belgium
Funding
National Foundation for Science and Technology Development · Fonds Wetenschappelijk Onderzoek · Vietnam Academy of Science and Technology
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