Imaging-based molecular barcoding with pixelated dielectric metasurfaces

• DOI: 10.1126/science.aas9768
• Publication Date: 2018-06-07T19:05:41Z
• Authors: Andreas Tittl; Aleksandrs Leitis; Mingkai Liu; Filiz Yesilkoy; Duk-Yong Choi; Dragomir N. Neshev; Yuri S. Kivshar; Hatice Altug
• Keywords: DNA Barcoding

Metasurfaces provide opportunities for wavefront control, flat optics, and subwavelength light focusing. We developed an imaging-based nanophotonic method detecting mid-infrared molecular fingerprints implemented it the chemical identification compositional analysis of surface-bound analytes. Our technique features a two-dimensional pixelated dielectric metasurface with range ultrasharp resonances, each tuned to discrete frequency; this enables absorption signatures be read out at multiple spectral points, resulting information is then translated into barcode-like spatial map imaging. The biological, polymer, pesticide molecules can detected high sensitivity, covering applications such as biosensing environmental monitoring. chemically specific resolve without need spectrometry, frequency scanning, or moving mechanical parts, thereby paving way toward sensitive versatile miniaturized spectroscopy devices.