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Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

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Optimization of sharp and viewing-angle-independent structural color.

Chia Wei Hsu, Owen D Miller, Steven G Johnson

|May 14, 2015

Summary

Researchers developed transparent structural color that is visible under directional light but invisible under broad light. This breakthrough achieves narrow bandwidth and broad viewing angles simultaneously for advanced display applications.

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Last Updated: Apr 12, 2026

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

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Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material

Published on: May 20, 2013

Area of Science:

Optics and photonics
Materials science
Nanotechnology

Background:

Structural coloration creates vibrant colors through light scattering, with applications in displays.
Transparent displays require wavelength-selective scattering, posing challenges for simultaneous narrow bandwidth and broad viewing angles.

Purpose of the Study:

To investigate and achieve transparent structural color with simultaneous narrow bandwidth and broad viewing angles.
To explore novel geometries for wavelength-selective and angle-insensitive light scattering.

Main Methods:

Utilized numerical optimization to discover specific geometries for dipole scatterers.
Analyzed interference patterns among scattered waves to achieve desired optical properties.

Main Results:

Discovered geometries exhibiting a sharp 7% scattering bandwidth.
Achieved angle-insensitive response with peak wavelength variation <1% and peak height/width variation <6% over 0-90° viewing angles.
Demonstrated transparency under omnidirectional broadband illumination and strong scattering under directional narrow-band illumination.

Conclusions:

Successfully demonstrated transparent structural color with simultaneous narrow bandwidth and broad viewing angles.
The optimized dipole scatterer arrangements provide a pathway for novel transparent display technologies.
This work overcomes previous limitations in achieving angle-insensitive, narrow-band structural color.