Abstract

We propose a new phenomenological law for the shape of the spectral lines in the infrared, which accounts for the exponential decay of the extinction coefficient in the high-frequency region, observed in many spectra. We apply this law to the measured infrared spectra of LiF, NaCl, and ${\mathrm{MgF}}_2$, finding good agreement over a wide range of frequencies.

© 2016 Optical Society of America

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