A model dielectric function for graphene from the infrared to the ultraviolet

A. Boosalis, R. Elmquist, M. Real, N. Nguyen, M. Schubert, T. Hofmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


A modified critical point model dielectric function for graphene is derived here and used to analyze spectroscopic ellipsometry data obtained over a wide spectral range from 3 to 9 eV. Critical point and exciton resonance energies are extracted and discussed. Our findings indicate that epitaxial graphene on SiC to exhibits equivalent exciton behavior to that of suspended graphene. We further apply our model dielectric function to evaluate dielectric function data for highly oriented pyrolytic graphite reported in the literature. Excellent agreement is found between the critical point model developed here and the literature data even for the low energy spectral range up to 1 eV.

Original languageEnglish (US)
Title of host publicationCarbon Nanomaterials
PublisherMaterials Research Society
Number of pages6
ISBN (Print)9781632660985
StatePublished - 2013
Event2012 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 25 2012Nov 30 2012

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2012 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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