A method to extract pure Raman spectrum of epitaxial graphene on SiC

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A method is proposed to extract pure Raman spectrum of epitaxial graphene on SiC by using a Non-negative Matrix Factorization

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A method is proposed to extract pure Raman spectrum of epitaxial graphene on SiC by using a Non-negative Matrix Factorization. It overcomes problems of negative spectral intensity and poorly resolved spectra resulting from a simple subtraction of a SiC background from the experimental data. We also show that the method is similar to deconvolution, for spectra composed of multiple sub- micrometer areas, with the advantage that no prior information on the impulse response functions is needed. We have used this property to characterize the Raman laser beam. The method capability in efficient data smoothing is also demonstrated

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  • A method to extract pure Raman spectrum of epitaxial graphene on SiC A method to extract pure Raman spectrum of epitaxial graphene on SiC
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Authors:  Jan Kunc, Yike Hu, James Palmer, Claire Berger, Walter A. de Heer

A method is proposed to extract pure Raman spectrum of epitaxial graphene on SiC by using a Non-negative Matrix Factorization. It overcomes problems of negative spectral intensity and poorly resolved spectra resulting from a simple subtraction of a SiC background from the experimental data. We also show that the method is similar to deconvolution, for spectra composed of multiple sub- micrometer areas, with the advantage that no prior information on the impulse response functions is needed. We have used this property to characterize the Raman laser beam. The method capability in efficient data smoothing is also demonstrated

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MRSEC

Categories
Art Research
Related Core Research Areas
Electronics and Nanotechnology, Materials
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Keywords
epitaxial graphene
Status
  • Created By: Gina Adams
  • Workflow Status: Published
  • Created On: Nov 15, 2013 - 10:12am
  • Last Updated: Oct 7, 2016 - 11:15pm