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Applied Optics

Applied Optics


  • Vol. 16, Iss. 9 — Sep. 1, 1977
  • pp: 2495–2499

Absorptance of thin films

R. G. Buckley and D. Beaglehole  »View Author Affiliations

Applied Optics, Vol. 16, Issue 9, pp. 2495-2499 (1977)

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This paper describes a study of the absorptance of thin films with the aim of elucidating the region of validity for a direct relationship between the absorptance and the absorption coefficient. The calculations are performed for an unsupported film, a film on a transparent or metallic substrate, and for the absorptance as a function of polarization.

© 1977 Optical Society of America

Original Manuscript: March 1, 1976
Published: September 1, 1977

R. G. Buckley and D. Beaglehole, "Absorptance of thin films," Appl. Opt. 16, 2495-2499 (1977)

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  1. D. Beaglehole, Appl. Opt. 7, 2218 (1968).
  2. T. M. Donovan, in M. H. Brodsky, S. Kirkpatrick, D. Weaire, Eds. Tetrahedially Bonded Amorphous Semiconductors (American Institute of Physics, New York, 1974); T. M. Donovan, M. L. Kotek, J. E. Fischer, in Amorphous and Liquid Semiconductors, J. Stuke, W. Breming, Eds. (Taylor and Francis, London, 1974).
  3. F. Abelès, in Advanced Optical Techniques, A.C.S. Van Heel, Ed. (North-Holland, Amsterdam, 1967).
  4. O. S. Heavens, Optical Properties of Thin Solid Films (Butterworths, London, 1955).
  5. For an unsupported film the electric wave amplitudes as a function of depth relative to the incident electric wave are given by E(x)=(1-r) exp(-iγx){1-r exp[-iγ2(d-x)]1-r2exp(-iγ2d)}. The wave intensity of Fig. 3 is given by E(x)E*(x), while in Fig. 4 this intensity has been averaged over the thickness d.
  6. A. Vasicek, in Optics of Thin Films, G. Hass, Ed. (North-Holland, Amsterdam, 1960).
  7. The irradiance is the power per unit solid angle per unit area perpendicular to the direction of propagation.

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