Researchers seek broadband/multiband electromagnetic absorbers based on plasmonic and metamaterial structures
Thursday, July 31, 2014 - 06:00
in Physics & Chemistry
Early research on electromagnetic (EM) absorbers dates back to 1902 when Wood observed the anomalous dips in the reflection spectra of metallic gratings under illumination of a white-light source. EM wave absorbers are devices in which the incident radiation at the operating wavelengths can be efficiently absorbed, and then transformed into ohmic heat or other forms of energy. Thereby, neither transmission nor reflection is produced when a wave passes through a perfect absorber.