Polarization-dependent interference effects in grazing-angle Fourier transform infrared reflection–absorption spectroscopy to determine the thickness of water-ice films

Abstract

Interference fringes appeared between 6000 and 4095 cm^-1 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 (E _σ) is 180° out of phase with the position of the fringe under parallel polarized light (E _π). 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

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