Angle-multiplexed all-dielectric metasurfaces for broadband molecular fingerprint retrieval.

ABSTRACT: Infrared spectroscopy resolves the structure of molecules by detecting their characteristic vibrational fingerprints. Subwavelength light confinement and nanophotonic enhancement have extended the scope of this technique for monolayer studies. However, current approaches still require complex spectroscopic equipment or tunable light sources. Here, we introduce a novel metasurface-based method for detecting molecular absorption fingerprints over a broad spectrum, which combines the device-level simplicity of state-of-the-art angle-scanning refractometric sensors with the chemical specificity of infrared spectroscopy. Specifically, we develop germanium-based high-Q metasurfaces capable of delivering a multitude of spectrally selective and surface-sensitive resonances between 1100 and

SUBMITTER: Leitis A 

PROVIDER: S-EPMC6527437 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature