Hyperspectral microscopy of boron nitride nanolayers using hybrid femto/picosecond coherent anti-Stokes Raman scattering

Elodie Lin; Michael Scherman; Aurelie Pierret; Brigitte Attal-Tretout; Amandine Andrieux; Laure Tailpied; Takashi Taniguchi; Kenji Watanabe; Annick Loiseau

doi:10.1364/OL.519571

Optics Letters
Vol. 49,
Issue 9,
pp. 2329-2332
(2024)
•https://doi.org/10.1364/OL.519571

Hyperspectral microscopy of boron nitride nanolayers using hybrid femto/picosecond coherent anti-Stokes Raman scattering

Elodie Lin, Michael Scherman, Aurelie Pierret, Brigitte Attal-Tretout, Amandine Andrieux, Laure Tailpied, Takashi Taniguchi, Kenji Watanabe, and Annick Loiseau

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Elodie Lin, Michael Scherman, Aurelie Pierret, Brigitte Attal-Tretout, Amandine Andrieux, Laure Tailpied, Takashi Taniguchi, Kenji Watanabe, and Annick Loiseau, "Hyperspectral microscopy of boron nitride nanolayers using hybrid femto/picosecond coherent anti-Stokes Raman scattering," Opt. Lett. 49, 2329-2332 (2024)

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About this Article
History
- Original Manuscript: January 23, 2024
- Revised Manuscript: March 25, 2024
- Manuscript Accepted: March 25, 2024
- Published: April 22, 2024

Abstract

The rise in interest in two-dimensional (2D) nanomaterials has been notable in recent years. In particular, hexagonal boron nitride (h-BN), recognized as an optimal substrate for enhancing graphene properties, holds promise for electronic applications. However, the widely employed spontaneous Raman microscopy, a gold standard for graphene study, faces strong limitations in h-BN due to its large bandgap and low cross section. In this Letter, high-resolution femto/picosecond coherent anti-Stokes Raman scattering (fs/ps-CARS) spectroscopy is used for hyperspectral imaging of nanometric h-BN layers. Our study establishes that CARS signal effectively enhances Raman signature related to in-plane ring vibrations, thus providing valuable quantitative insights into sample thickness and crystalline quality, also corroborated by additional AFM measurements.

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