Microstructure and IR range optical properties of pure DLC and DLC containing dopants prepared by pulsed laser deposition

Q. Wei, A. K. Sharma, R. J. Narayan, N. M. Ravindra, S. Oktyabrsky, J. Sankar, J. F. Muth, R. M. Kolbas, J. Narayan

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


We have investigated the microstructure and the IR range optical properties (emittance, transmittance and reflectance) of diamond-like carbon (DLC) films with the incorporation of dopants. The DLC films were deposited by pulsed laser deposition with a novel target configuration allowing incorporation of dopants, such as silicon, titanium and copper, into the films. Raman spectroscopy, radial distribution function (RDF) and coordination defect analysis of the electron diffraction pattern of the films showed typical features of DLC with a structure dictated by sp3 bonded carbon, indicating that the overall DLC characteristics did not change upon doping. The IR range optical measurements showed that in addition to the general band-to-band transitions, free carriers and phonon contributions, localized states also contribute to the emissivity in DLC and they smooth out the sharp features of the emissivity spectra. The effect of dopants is to enhance the contribution from the free carriers and localized states. The results were discussed on the basis of the effect of dopants on the electronic structure of DLC films.

Original languageEnglish (US)
Pages (from-to)331-336
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 1998
Externally publishedYes
EventProceedings of the 1998 MRS Spring Meeting - San Francisco, CA, USA
Duration: Apr 13 1998Apr 16 1998

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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