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Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
Published on: August 29, 2017
Shadow-angle method for anisotropic and weakly absorbing films
G Surdutovich1, R Vitlina, V Baranauskas
1Departamento de Semicondutores, Instrumentos e Fotônica, Faculdade de Engenharia Elétrica e de Computacão, Unicamp, CEP 13083-970 Campinas, São Paulo, Brazil. gregory@dsif.fee.unicamp.br
Applied Optics
|March 8, 2008
Summary
This study introduces a new method to determine a film's optical properties using two specific light incidence angles. The technique enhances the conventional Abelès method, enabling broader applications for thin film analysis.
Area of Science:
- Optics
- Materials Science
- Thin Film Analysis
Background:
- Determining optical properties of thin films is crucial for material characterization.
- The conventional Abelès method relies on specific Brewster angles but has limitations.
Purpose of the Study:
- To propose a novel method for determining optical properties of films on isotropic substrates.
- To overcome limitations of the conventional Abelès method for broader film analysis.
Main Methods:
- Utilizes two specific incidence angles (Abelès and film-substrate Brewster angles) in p-polarized light.
- Employs a cylindrical lens ambient to remove constraints on dielectric permittivities.
- Applies the method to wedge-shaped or variable thickness films.
Main Results:
- The modified method allows observation of both Brewster angles under specific conditions.
- Enables the use of the Abelès method for films with any dielectric permittivity.
- Successfully determines film refractive index, optical anisotropies, and weak absorption.
Conclusions:
- The proposed method expands the applicability of the Abelès technique for thin film characterization.
- Offers a versatile approach for analyzing optical properties, including anisotropy and absorption.
- Provides a robust tool for scientific and industrial thin film analysis.
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