Electric Field Intensity Modulated Scattering as a Thin-Film Depth Probe

Grazing incidence x-ray scattering provides nanostructural information for thin film samples, but single images generally do not provide information on film thickness or the full complex index of refraction. Additionally, for thin films that possess stratification of scatterers vertically within a s...

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Published in:arXiv.org 2019-12
Main Authors: Dudenas, Peter J, Weber, Adam Z, Kusoglu, Ahmet
Format: Article
Language:English
Subjects:
Film thickness
Incidence angle
Optical properties
Polymer films
Refractivity
Thin films
X-ray scattering
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description Grazing incidence x-ray scattering provides nanostructural information for thin film samples, but single images generally do not provide information on film thickness or the full complex index of refraction. Additionally, for thin films that possess stratification of scatterers vertically within a sample, it can be difficult to determine where those scatterers are positioned. We present an in-situ method to extract film thickness, the index of refraction, and depth information using scattering images taken across a range of incident angles. The underlying theory is presented, and we validate the technique using two sets of polymer thin films. Finally, we discuss how it can be implemented as a general beamline procedure. This technique is applicable to any thin-film material and has potentially far-reaching impact by enabling depth-sensitive information in situ at any grazing incidence-capable beamline.
doi_str_mv 10.48550/arxiv.1907.12217
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subjects Film thickness
Incidence angle
Optical properties
Polymer films
Refractivity
Thin films
X-ray scattering
title Electric Field Intensity Modulated Scattering as a Thin-Film Depth Probe
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