The special electromagnetic properties of metamaterials have contributed to the development terahertz technology, and broadband absorbers for various applications been investigated. design metamaterial with tunability is in a particularly attractive position. In this work, tunable absorber proposed based on phase transition material vanadium dioxide (VO2). simulation results show that an excell...

Terahertz (THz) absorbers for imaging, sensing, and detection are in high demand. However, such devices suffer from manufacturing costs limited absorption bandwidths. In this study, we presented a low-cost broadband tunable THz absorber based on one-step laser-induced graphene (LIG). The laser-machining-parameter-dependent morphology performance of the were investigated. Coarse tuning was reali...

We investigate the absorption properties of graphene-based anisotropic metamaterial structures where the metamaterial layer possesses an electromagnetic response corresponding to a near-zero permittivity. We find that through analytical and numerical studies, near perfect absorption arises over an unusually broad range of beam incidence angles. Due to the presence of graphene, the absorption is...

The application of Zn compounds as buffer layers was recently extended to wide-gap CuInS2 CIS based thin-film solar cells. Using an alternative chemical deposition route for the buffer preparation aiming at the deposition of a single-layer, nominal ZnS buffer without the need for any toxic reactants such as hydrazine has helped us to achieve a similar efficiency as respective CdS-buffered refer...