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.
Tip-enhanced broadband CARS spectroscopy and imaging using a photonic crystal fiber based broadband light source†
Article first published online: 4 APR 2012
Copyright © 2012 John Wiley & Sons, Ltd.
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
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
- Issue published online: 17 MAY 2012
- Article first published online: 4 APR 2012
- Manuscript Accepted: 21 NOV 2011
- Manuscript Received: 18 NOV 2011
- N.H.. Grant Number: 23760055
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. Grant Number: 21686007
- 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.