A New Model for the Infrared Dielectric Function of Amorphous Materials

Details A New Model for the Infrared Dielectric Function of Amorphous Materials A New Model for the Infrared Dielectric Function of Amorphous Materials

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...467..894l&link_type=abstract

Astrophysical Journal v.467, p.894

Astronomy and Astrophysics

Astronomy

3

Ism: Dust, Extinction, Methods: Laboratory, Infrared: General

Scientific paper

The infrared dielectric function of amorphous materials near-IR strong resonances is derived from the materials' crystalline optical constants using a simple transform. The technique assumes that there is a continuous distribution of oscillators, each with its own resonant frequency, damping, and plasma frequency. By convoluting the crystalline dielectric function with a suitable function representing the distributions, we show that the dielectric functions for amorphous quartz and olivine can be estimated with modest accuracy. The technique provides a simple means of computing the gross influence of atomic disorder on spectral characteristics of possible cosmic dust components in the vicinity of strong infrared resonances.

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