Rendering Transparent Materials with a Complex Refractive Index: Semi-conductor and Conductor Thin Layers

Gerardin, Morgane; Holzschuch, Nicolas; Martinetto, Pauline

Rendering Transparent Materials with a Complex Refractive Index: Semi-conductor and Conductor Thin Layers

Files

013-016.pdf (32.54 MB)

Date

2019

Authors

Gerardin, Morgane
Holzschuch, Nicolas
Martinetto, Pauline

Publisher

The Eurographics Association

Abstract

During physical simulation of light transport, we separate materials between conductors and dielectrics. The former have a complex refractive index and are treated as opaque, the latter a real one and are treated as transparent. However, thin layers with a complex refractive index can become transparent if their thickness is small compared to the extinction coeffcient. This happens with thin metallic layers, but also with many pigments that are semiconductors: their extinction coeffcient (the imaginary part of their refractive index) is close to zero for part of the visible spectrum. Spectral effects inside these thin layers (attenuation and interference) result in dramatic color changes.

        @inproceedings{10.2312:mam.20191306
,
booktitle = {Workshop on Material Appearance Modeling
},
editor = {Klein, Reinhard and Rushmeier, Holly
},
title = {{Rendering Transparent Materials with a Complex Refractive Index: Semi-conductor and Conductor Thin Layers
}},
author = {Gerardin, Morgane and 
Holzschuch, Nicolas and 
Martinetto, Pauline
},
year = {2019
},
publisher = {The Eurographics Association
},
ISSN = {2309-5059
},
ISBN = {978-3-03868-080-2
},
DOI = {10.2312/mam.20191306
}
}