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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 17 — Jun. 10, 2011
  • pp: 2773–2783

Inverse relationships for reflection diagnostics of uniaxially anisotropic nanoscale films on isotropic materials

Peep Adamson  »View Author Affiliations

Applied Optics, Vol. 50, Issue 17, pp. 2773-2783 (2011)

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The possibilities of determining the parameters of uniaxially anisotropic ultrathin nonabsorbing dielectric films on absorbing or transparent isotropic substrates by surface differential reflectance measurements are analyzed. The analysis is based on analytical reflection formulas obtained in the framework of a long-wavelength approximation. It is shown that, in the case of transparent substrates, it is always possible to determine the thickness of a uniaxially ultrathin film and its four parameters of anisotropy (optical constants n o and n e and angles θ and φ) simultaneously. However, for such films on absorbing substrates, it is possible to decouple the thickness and optical constants by differential reflectance measurements only if θ 0 . The accuracy of the obtained analytic formulas for determining the parameters of ultrathin films is estimated by computer simulations where the reflection problem was solved numerically on the basis of the rigorous electromagnetic theory for anisotropic layered systems.

© 2011 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(240.0310) Optics at surfaces : Thin films
(260.2110) Physical optics : Electromagnetic optics
(260.2130) Physical optics : Ellipsometry and polarimetry
(310.6860) Thin films : Thin films, optical properties
(240.6645) Optics at surfaces : Surface differential reflectance

ToC Category:
Optics at Surfaces

Original Manuscript: December 6, 2010
Revised Manuscript: February 2, 2011
Manuscript Accepted: February 3, 2011
Published: June 9, 2011

Peep Adamson, "Inverse relationships for reflection diagnostics of uniaxially anisotropic nanoscale films on isotropic materials," Appl. Opt. 50, 2773-2783 (2011)

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