Tip-enhanced broadband CARS spectroscopy and imaging using a photonic crystal fiber based broadband light source

Kentaro Furusawa, Norihiko Hayazawa, Francesca Celine Catalan, Takayuki Okamoto, Satoshi Kawata

研究成果: Article査読

29 被引用数 (Scopus)

抄録

We report tip-enhanced broadband coherent anti-Stokes Raman scattering (CARS) spectroscopy and imaging based on a broadband light source using a photonic crystal fiber. Multiplexing from 900 cm -1 to 2200 cm -1 is achieved by optimizing the supercontinuum generation process at a high numerical aperture focus. By combining this system with a shear-force microscope, semiconducting carbon nanotubes are imaged with a spatial resolution of 60 nm. Our results show that tip-enhanced broadband CARS image exhibits a positive contrast even though the enhancement effect has not been fully optimized. Analyses of delay-dependent tip-enhanced broadband CARS spectra suggest the possibilities of multiple carrier interactions that uniquely occur at high intensities within the nanotubes.

本文言語English
ページ(範囲)656-661
ページ数6
ジャーナルJournal of Raman Spectroscopy
43
5
DOI
出版ステータスPublished - 2012 5月

ASJC Scopus subject areas

  • 材料科学(全般)
  • 分光学

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