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Nanoscale Spatial Resolution in Far-Field Raman Imaging Using Hyperspectral Unmixing in Combination with Positivity Constrained Super-Resolution

Abstract : This work introduces hyper-resolution (HyRes), a numerical approach for spatial resolution enhancement that combines hyperspectral unmixing and super-resolution image restoration (SRIR). HyRes yields a substantial increase in spatial resolution of Raman spectroscopy while simultaneously preserving the undistorted spectral information. The resolving power of this technique is demonstrated on Raman spectroscopic data from a polymer nanowire sample. Here, we demonstrate an achieved resolution of better than 14 nm, a more than eightfold improvement on single-channel imagebased SRIR and 25 better than regular far-field Raman spectroscopy, and comparable to near-field probing techniques
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https://hal.archives-ouvertes.fr/hal-02563888
Contributor : Saïd Moussaoui <>
Submitted on : Tuesday, May 5, 2020 - 4:24:00 PM
Last modification on : Tuesday, January 5, 2021 - 4:26:08 PM

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  • HAL Id : hal-02563888, version 1

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Dominik Winterauer, Daniel Funes-Hernando, Jean-Luc Duvail, Said Moussaoui, Tim Batten, et al.. Nanoscale Spatial Resolution in Far-Field Raman Imaging Using Hyperspectral Unmixing in Combination with Positivity Constrained Super-Resolution. Applied Spectroscopy, Society for Applied Spectroscopy, In press. ⟨hal-02563888⟩

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