Polarization-insensitive ultra-wideband metamaterial absorber comprising different forms of ZrN structures at the metasurface

Layered Structure Based on PANi and SiO2 to Absorb HPM to Protect Systems and Devices

“…Impedance matching makes it hard to achieve optimal performance in an absorber design [39]. The absorber impedance should be close to the characteristic air impedance to achieve near-unity absorption, typically around 377 Ω at the appropriate frequency [40]. The reflected component can be computed under the normal excitation as…”

Broadband near unity absorption meta-structure for solar thermophotovoltaic systems and optical window applications

“…Here, the dimensions of the proposed meta-structure are taken according to recent research in optical wavelength applications. 36,39,52,[64][65][66][67][68] The unit cell's resonator metal layer is composed of four linked cylinders, each connected to a T-shaped Jerusalem cross. The proposed meta-structure unit cell geometry is finalized in five steps, as shown in Fig.…”

“…The insulator thickness in recent meta-structure research of optical applications is found within the range of 60 to 150 nm. 52,[64][65][66]79 The absorbance properties were evaluated using an insulator thickness range of H s = 55 to 85 nm at an interval of 10 nm. Fig.…”

“…The resonator thickness of the meta-structure is found within 20 to 30 nm in recent research on optical wavelength applications. 65,66,79 Shifting H r = 25 to 10 nm reduces the absorbance between 400 and 600 nm wavelengths. Absorption is found higher for H r = 10 and 15 nm than H r = 20 and 25 nm in the 600-1500 nm range.…”

An ultra-broadband and wide-angle absorber based on a TiN metamaterial for solar harvesting

“…So far, various structures of solar absorbers have been proposed by scholars for the solar radiation spectrum. [21][22][23][24] Zhong et al 25 proposed a semi-cylindrical cavity structure absorber based on refractory materials. The average absorption in the visible region is up to 94%.…”