Research Article

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

  1. Kentaro Furusawa1,2,*,
  2. Norihiko Hayazawa1,2,3,
  3. Francesca Celine Catalan1,4,
  4. Takayuki Okamoto1,
  5. Satoshi Kawata1,2,3,5

Article first published online: 4 APR 2012

DOI: 10.1002/jrs.3151

Issue

Journal of Raman Spectroscopy

Journal of Raman Spectroscopy

Special Issue: Development and applications of nonlinear optical spectroscopy - 10th ECONOS / 30th ECW meeting in Enschede, The Netherlands

Volume 43, Issue 5, pages 656–661, May 2012

Additional Information

How to Cite

Furusawa, K., Hayazawa, N., Catalan, F. C., Okamoto, T. and Kawata, S. (2012), Tip-enhanced broadband CARS spectroscopy and imaging using a photonic crystal fiber based broadband light source. J. Raman Spectrosc., 43: 656–661. doi: 10.1002/jrs.3151

Author Information

  1. 1

    Nanophotonics Laboratory, RIKEN, Wako, Saitama, Japan

  2. 2

    Near-field nanophotonics research team, RIKEN, Wako, Saitama, Japan

  3. 3

    CREST, Japan Corporation of Science and Technology, Kawaguchi, Saitama, Japan

  4. 4

    National Institute of Physics, University of the Philippines, Philippines

  5. 5

    Department of Applied Physics, Osaka University, Suita, Osaka, Japan

*Kentaro Furusawa, Nanophotonics Laboratory, RIKEN, 2-1, Hirosawa, Wako, Saitama, 351-0198 Japan. E-mail: kfurusawa@riken.jp

  1. †

    This article is part of the Journal of Raman Spectroscopy special issue entitled “Development and applications of nonlinear optical spectroscopy - 10th ECONOS / 30th ECW meeting in Enschede, The Netherlands” edited by Herman Offerhaus, Peter Radi, and Cees Otto.

Publication History

  1. Issue published online: 17 MAY 2012
  2. Article first published online: 4 APR 2012
  3. Manuscript Accepted: 21 NOV 2011
  4. Manuscript Received: 18 NOV 2011

Funded by

  • N.H.. Grant Number: 23760055
  • Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. Grant Number: 21686007

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Keywords:

  • broadband multiplex CARS;
  • near-field microscopy

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. Copyright © 2012 John Wiley & Sons, Ltd.

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