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Ultrasensitive hyperspectral imaging and biodetection enabled by dielectric metasurfaces
Publikationstyp
Letter to the Editor
Date Issued
2019-04-01
Sprache
English
Author(s)
Yesilkoy, Filiz
Arvelo, Eduardo R.
Jahani, Yasaman
Liu, Mingkai
Cevher, Volkan
Altug, Hatice
Journal
Volume
13
Issue
6
Start Page
390
End Page
396
Citation
Nature Photonics 13 (6): 390-396 (2019)
Publisher DOI
Scopus ID
Publisher
Springer Nature
Metasurfaces based on resonant subwavelength photonic structures enable novel ways of wavefront control and light focusing, underpinning a new generation of flat-optics devices<sup>1</sup>. Recently emerged all-dielectric asymmetric metasurfaces, composed of arrays of metaunits with broken in-plane inversion symmetry, exhibit high-quality resonances originating from the intriguing physics of bound states in the continuum. Here, we combine dielectric metasurfaces and hyperspectral imaging to develop an ultrasensitive label-free analytical platform for biosensing. Our technique can acquire spatially resolved spectra from millions of image pixels and use smart data-processing tools to extract high-throughput digital sensing information at the unprecedented level of less than three molecules per μm. We further show spectral data retrieval from a single image without using spectrometers, enabled by our unique sensor design, paving the way for portable diagnostic applications. This combination of nanophotonics and imaging optics extends the capabilities of dielectric metasurfaces to analyse biological entities and atomic-layer-thick two-dimensional materials over large areas.
DDC Class
570: Life Sciences, Biology
600: Technology