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Updated: Feb 12, 2026
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Large-area broadband optical absorber fabricated by shadowing sphere lithography
Optics Express
|April 4, 2018
Summary
Researchers developed a large-area broadband optical absorber using silver/silica plasmonic layers on polystyrene spheres. This novel material efficiently absorbs over 90% of light from 350-850 nm, showing promise for light cloaking and energy applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Broadband optical absorbers are crucial for applications like energy harvesting and light management.
- Existing broadband absorbers often face challenges in large-area fabrication and cost-effectiveness.
Purpose of the Study:
- To develop a simple, flexible, and large-area broadband optical absorber.
- To investigate the plasmonic properties of Ag/SiO2 stacked layers on self-assembled polystyrene spheres.
Main Methods:
- Fabrication of Ag/SiO2 stacked plasmonic layers on a polystyrene sphere monolayer using glancing angle deposition.
- Characterization of optical absorption properties across a broad spectral range.
Main Results:
- Achieved over 90% light absorption in the 350-850 nm spectral range for absorbers with 750 nm polystyrene spheres.
- Broadband absorption attributed to overlapping localized plasmonic resonance wavelengths from varied Ag coating.
- Demonstrated a simple, flexible, and large-area fabrication process.
Conclusions:
- The developed Ag/SiO2 stacked plasmonic absorber offers efficient broadband light absorption.
- The self-assembly and glancing angle deposition method enables large-area fabrication.
- Potential applications in light cloaking and energy conversion technologies.
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