Polarization-dependent wideband metamaterial absorber for ultraviolet to near-infrared spectral range applications
Fangfang Li, Ibrahim Issah, Marian Baah, Reuben Amedalor, Mariam Maku Quarshie, Prince Bawuah, Benjamin O. Asamoah
Abstract
The need for wideband metamaterial absorbers (WBMA) for applications other than sensing and filtering has demanded modifications to the conventional three-layer metal-insulator-metal (MIM) absorber configuration. This modification often results in complex geometries and an increased number of layers requiring complex lithographic processes for fabrication. Here, we show that a metamaterial absorber with rectangular geometry in the simple MIM configuration can provide wideband absorption covering the ultraviolet and near-infrared spectral range. Due to its asymmetric nature, the WBMA is sensitive to the polarization of the incident light and independent of the angle of incidence up to about 45° depending on the polarization of the incident light. The characteristics of the WBMA presented here may be useful for applications such as detectors for wide spectral band applications.