Geometric Optics Applied to Rough Surfaces Coated with an Absorbing Thin Film

1999 ◽  
Vol 13 (2) ◽  
pp. 169-176 ◽  
Author(s):  
Kakuen Tang ◽  
Paul A. Kawka ◽  
Richard O. Buckius
Keyword(s):  
Thin Film ◽  
Rough Surfaces ◽  
Geometric Optics

Hemispherical Emittance of a Semitransparent Fiber Coated With a Submicron Absorbing Film

2005 ◽  
Author(s):  
Weixue Tian ◽  
Wei Huang ◽  
Wilson K. S. Chiu
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Radiative Transfer ◽  
Extinction Coefficient ◽  
Wave Optics ◽  
Geometric Optics ◽  
Fiber Radius

This study presents a model to predict the directional and hemispherical emittance of a fiber coated with up to 2 μm film. The fiber is composed of semitransparent media with a small extinction coefficient. Transmittance and reflectance of the thin film is calculated based on the flat thin film assumption, because the thickness of the film is much less than the fiber radius, and the curvature can be neglected. Predicted emittance from wave optics is compared to geometric optics for modeling radiative transfer in thin film. Steep changes in emittance are predicted by wave optics for films that are nanometers thick. This effect was not observed from geometric optics analysis. Effects of film and fiber substrate optical properties are also studied.

scholarly journals Geometric optics of gold nanoparticle-polydimethylsiloxane thin film systems

2014 ◽  
Vol 4 (2) ◽  
pp. 375 ◽  
Author(s):  
Jeremy R. Dunklin ◽  
Gregory T. Forcherio ◽  
D. Keith Roper
Keyword(s):  
Thin Film ◽  
Gold Nanoparticle ◽  
Geometric Optics
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