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Imaging-based molecular barcoding with pixelated dielectric metasurfaces
Publikationstyp
Journal Article
Date Issued
2018-06-08
Sprache
English
Author(s)
Leitis, Aleksandrs
Yesilkoy, Filiz
Altug, Hatice
Journal
Volume
360
Issue
6393
Start Page
1105
End Page
1109
Citation
Science 360 (6393): 1105-1109 (2018)
Publisher DOI
Scopus ID
Publisher
American Association for the Advancement of Science
Metasurfaces provide opportunities for wavefront control, flat optics, and subwavelength light focusing.We developed an imaging-based nanophotonic method for detecting mid-infrared molecular fingerprints and implemented it for the chemical identification and compositional analysis of surface-bound analytes. Our technique features a twodimensional pixelated dielectric metasurface with a range of ultrasharp resonances, each tuned to a discrete frequency; this enables molecular absorption signatures to be read out at multiple spectral points, and the resulting information is then translated into a barcodelike spatial absorption map for imaging. The signatures of biological, polymer, and pesticide molecules can be detected with high sensitivity, covering applications such as biosensing and environmental monitoring. Our chemically specific technique can resolve absorption fingerprints without the need for spectrometry, frequency scanning, or moving mechanical parts, thereby paving the way toward sensitive and versatile miniaturized midinfrared spectroscopy devices.
DDC Class
600: Technology