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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 7 — Jul. 1, 1999
  • pp: 1044–1048

Improvement of sensitivity in the analysis of vibrational properties of thin films by use of in situ ellipsometry: applications to hydrogenated amorphous carbon films

Thibaut Heitz, Bernard Drévillon, and Christian Godet  »View Author Affiliations


JOSA B, Vol. 16, Issue 7, pp. 1044-1048 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001044


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Abstract

An analysis method is developed to investigate the vibrational properties of thin films by use of infrared in situ ellipsometry. The procedure is based on the study of regions located in or outside the vibrational bands as a function of film thickness. Infrared index, line positions, bandwidths, and absorption intensities can be determined, even in the case of low oscillator strengths. As an illustration, CH bonding of 100-nm-thick hydrogenated amorphous carbon films have been studied: Weak vibrations located at 1405 and 1440 cm-1, which had not been observed so far, are evidenced, thus revealing the presence of CH olefinic units and methyl groups bonded to sp2-configured carbon.

© 1999 Optical Society of America

OCIS Codes
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(160.2750) Materials : Glass and other amorphous materials
(160.5470) Materials : Polymers
(300.6340) Spectroscopy : Spectroscopy, infrared

Citation
Thibaut Heitz, Bernard Drévillon, and Christian Godet, "Improvement of sensitivity in the analysis of vibrational properties of thin films by use of in situ ellipsometry:applications to hydrogenated amorphous carbon films," J. Opt. Soc. Am. B 16, 1044-1048 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-7-1044

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