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Updated: Jan 25, 2026
Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
Published on: August 29, 2017
Design of planar and wideangle resonant color absorbers for applications in the visible spectrum
Igor Leonardo Gomes de Souza1, Vitaly Felix Rodriguez-Esquerre2
1Department of Electrical Engineering, Federal University of Bahia, Salvador, 40155-250, Brazil. ilgsouza@ufba.br.
Abstract:
We propose a design approach for color absorbers based on a tri-layer metal-dielectric-metal (MDM) planar geometry, which maintains the same color absorbed, over a range of incident angles from 0° to 80° for light with TM polarization. The dielectrics are chosen to satisfy the ideal conditions of resonance. We calculate the ideal thickness of each dielectric layer by using the planar resonance theory. The numerical results show a total absorption above 85% for all colors of the absorber. We analyzed the influence of the of the metallic top layer thickness and we demonstrated the fabrication error tolerance of the proposed absorber. Finally, we present and discuss the physical mechanisms for the coupling of the electromagnetic field and the absorbed optical power in the structure.
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