Abstract

Metasurfaces for molecular detection Although mid-infrared (mid-IR) spectroscopy is a mainstay of molecular fingerprinting, its sensitivity is diminished somewhat when looking at small volumes of sample. Nanophotonics provides a platform to enhance the detection capability. Tittl et al. built a mid-IR nanophotonic sensor based on reflection from an all-dielectric metasurface array of specially designed scattering elements. The scattering elements could be tuned via geometry across a broad range of wavelengths in the mid-IR. The approach successfully detected and differentiated the absorption fingerprints of various molecules. The technique offers the prospect of on-chip molecular fingerprinting without the need for spectrometry, frequency scanning, or moving mechanical parts. Science , this issue p. 1105

Keywords

DNA barcodingDielectricMaterials scienceOpticsBiologyEvolutionary biologyPhysicsOptoelectronics

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Publication Info

Year
2018
Type
article
Volume
360
Issue
6393
Pages
1105-1109
Citations
1168
Access
Closed

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Andreas Tittl, Aleksandrs Leitis, Mingkai Liu et al. (2018). Imaging-based molecular barcoding with pixelated dielectric metasurfaces. Science , 360 (6393) , 1105-1109. https://doi.org/10.1126/science.aas9768

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DOI
10.1126/science.aas9768