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Ultra-thin films with highly absorbent porous media fine-tunable for coloration and enhanced color purity

Title
Ultra-thin films with highly absorbent porous media fine-tunable for coloration and enhanced color purity
Authors
Yoo, Young JinLim, Jin HaLee, Gil JuJang, Kyung-InSong, Young Min
DGIST Authors
Jang, Kyung-In
Issue Date
2017-03-07
Citation
Nanoscale, 9(9), 2986-2991
Type
Article
Article Type
Article
Keywords
Angle IndependentCoatingsColorColor RepresentationControlled PorosityDielectric LayerE Beam EvaporationGermaniumGlancing Angle DepositionLayers AbsorptionOblique Angle DepositionOptical CoatingsPorous MaterialsReflectance SpectrumSubstratesThin FilmsUltra Thin Film CoatingsUltra Thin Films
ISSN
2040-3364
Abstract
We demonstrate ultra-thin, fine-tunable optical coatings with enhanced color purity based on highly absorbent porous media on a metal substrate. We show that the color range provided by these ultra-thin film coatings can be extended by making the absorptive dielectric layer porous. Oblique angle deposition (OAD) of a thin (10-25 nm) germanium (Ge) film by e-beam evaporation onto a thick gold substrate yields controlled porosity. Reflectance spectra and color representations from both calculations and experiments verify the enhancement of resonance tunability and color purity in the nano-tailored coatings. Angle independent reflection properties, and the applicability of such porous Ge on various metal substrates, indicate the strength of these concepts. © 2017 The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/4221
DOI
10.1039/c6nr08475c
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Jang, Kyung In Bio-embedded Electronics Lab
  • Research Interests Extreme mechanics; Stand-alone electronics; Heterogeneous materials; Biocompatible interfaces
Files:
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Collection:
ETC1. Journal Articles


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