Interference fringes appeared between 6000 and 4095 cm<sup>−1</sup> in the infrared spectra of thin water-ice films vapor deposited on an aluminum substrate and probed with grazing-angle Fourier transform infrared reflection–absorption spectroscopy. At grazing incidence the position of the fringe under perpendicularly polarized light (<i>E</i><sub>ς</sub>) is 180° out of phase with the position of the fringe under parallel polarized light (<i>E</i><sub>π</sub>). This shift in fringe position with polarization offers a convenient way to estimate the thickness (∓5%) of water-ice films between 0.5 and 1.4 μm.
© 1999 Optical Society of America
(240.0310) Optics at surfaces : Thin films
(260.3160) Physical optics : Interference
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(310.6860) Thin films : Thin films, optical properties
Marin S. Robinson, Govind Mallick, Jennifer L. Spillman, Priscilla A. Carreon, and Stephanie Shalloo, "Polarization-Dependent Interference Effects in Grazing-Angle Fourier Transform Infrared Reflection-Absorption Spectroscopy to Determine the Thickness of Water-Ice Films," Appl. Opt. 38, 91-95 (1999)