Related Experiment Video
Updated: Jan 22, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
High-performance and cost-effective absorber for visible and near-infrared spectrum based on a spherical multilayered
Abstract:
A broadband, polarization-insensitive, wide-angle absorber based on a spherical multilayered dielectric-metal structure is numerically designed and experimentally demonstrated in this paper. This absorber has average absorbance of 0.98 between 380 and 1910 nm, indicating a spectral width of 1530 nm with absorbance exceeding 0.9, and covering the entire visible and near-infrared spectrum. The physical mechanism leading to this broadband absorption is discussed along with the effect of structural parameters on the absorber performance. Importantly, the absorbance is hardly affected by incident angle below 45° and it still stays at a high level with incident angle up to 60°, for both transverse magnetic and transverse electric plane waves.
Related Concept Videos
The Electromagnetic Spectrum
Spherical Coordinates
Alkali Metals
Table 1: Properties of the alkali metals
Capacitor With A Dielectric
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
IR Spectrum
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....

