Optical studies of nitrogen-doped amorphous carbon: laboratory and interstellar investigations

James H. Kaufman; Serhat Metin; David D. Saperstein

doi:10.1117/12.45128

1 April 1991 Optical studies of nitrogen-doped amorphous carbon: laboratory and interstellar investigations

James H. Kaufman, Serhat Metin, David D. Saperstein

Proceedings Volume 1437, Applied Spectroscopy in Material Science; (1991) https://doi.org/10.1117/12.45128
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

Measurements of plasma generated amorphous carbon films (a:C-II and A:C) in our laboratory show that nitrogen doping of the carbon imparts infrared activity to the films. In particular, the Raman G and D bands which are infrared inactive in typical amorphous carbons become active when nitrogen is substituted for carbon. This increase in infrared activity is attributed to a symmetry breaking by the nitrogen centers. In this paper we show that this symmetry breaking also gives rise to increases infrared emission. We suggest this same mechanism may be relevant to the origin of diffuse interstellar infrared emission from carbonaceous dust.

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James H. Kaufman, Serhat Metin, and David D. Saperstein "Optical studies of nitrogen-doped amorphous carbon: laboratory and interstellar investigations", Proc. SPIE 1437, Applied Spectroscopy in Material Science, (1 April 1991); https://doi.org/10.1117/12.45128

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