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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 4 — Feb. 1, 1999
  • pp: 647–654

Spectroscopic ellipsometry of anisotropic materials: application to the optical constants of HgI2

Aotmane En Naciri, Luc Johann, Roland Kleim, Manuel Sieskind, and Marianne Amann  »View Author Affiliations


Applied Optics, Vol. 38, Issue 4, pp. 647-654 (1999)
http://dx.doi.org/10.1364/AO.38.000647


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Abstract

A variable angle-of-incidence spectroscopic fixed-polarizer, rotating-polarizer, fixed-analyzer ellipsometer (PRPSE) across a spectral range from 300 to 800 nm is used to determine the optical properties of anisotropic uniaxial tetragonal red mercuric iodide (HgI2). For the first time, to our knowledge, the bulk crystal HgI2 surface measured by ellipsometry was not subjected to potassium iodide cutting or etching. Measurements were made at an air–HgI2 interface with the optic axis parallel to the sample surface. To determine the optical constants, we varied both the angle of incidence and the azimuth of the optic axis with the plane of incidence. The detailed formulas needed for reliable procedures for analyzing the data are presented. The ordinary and extraordinary complex indices of refraction, (n o - ik o ) and (n e - ik e ), respectively, are determined. Good agreement between PRPSE and the prism technique for the refractive index is observed. The surface aging effects of the ellipsometric parameters of HgI2, during 30 h of exposure to air, were detected by PRPSE.

© 1999 Optical Society of America

OCIS Codes
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(240.4350) Optics at surfaces : Nonlinear optics at surfaces
(240.6490) Optics at surfaces : Spectroscopy, surface
(260.1180) Physical optics : Crystal optics

History
Original Manuscript: July 7, 1998
Revised Manuscript: October 12, 1998
Published: February 1, 1999

Citation
Aotmane En Naciri, Luc Johann, Roland Kleim, Manuel Sieskind, and Marianne Amann, "Spectroscopic ellipsometry of anisotropic materials: application to the optical constants of HgI2," Appl. Opt. 38, 647-654 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-4-647


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