Broadband sound sink/absorber via a structure with deep sub-wavelength thickness is of great and continuing interest in physics and engineering communities. An intuitive technique extensively used is to combine components (resonators) with quasi-perfect absorption to piece together a broad absorbing band...
The performance of a sound absorber is typically characterised by the absorption coefficient as a function of the depth of the absorber in relation to the acoustic wavelength, \(\lambda \). For absorptive foams such as polyurethane or melamine foams, depths of between \(\lambda \) and \(\...
The absorption performance of the TiN nano-disk/SiO2/Al structure is studied firstly. In order to optimize the performance of the structure, the dependences of the absorption spectra on the diameter and the thickness of TiN nano-disks, and the thickness of SiO2spacer layer, respectively, have b...
there is no change in the performance of absorber when value of Ф is increased. In Supporting Information, discussions on power distribution density at Θ = 0° has been carried out extensively (Fig. S4). Figure 7a shows variations in the real and imaginary part of the impedances...
The proposed work is very compact (unit cell size: 0.22 位0) with ultrathin substrate height (0.07 位0) and giving RAB performance of 54.51% comparable with that of others. Thus with this single-layer low-cost substrate material a broadband absorber is achieved....
The performance of the absorber was simulated as a function of its geometric parameters and the angle of incident beam as well. The results are discussed in terms of localized surface plasmonic resonance mechanism and dispersion effect of TiN, and the absorption features are qualitatively explained ...
The novelties of this study include its simple design, ease of fabrication, low cost, compact size, and broadband performance. Furthermore, the proposed design holds significant promise for real-world applications due to its reconfigurability. Our innovative metamaterial absorber has potential ...
BeamTrack系列F150A-BB-26-PPS激光测量传感器可以测量激光光束的大小、位置、功率和能量。孔径为26mm,测量激光光束大小、位置时,精度分别可达5%和0.1mm。其功率测量范围是40mW~150W,而能量测量范围是20mJ~100J。其具有频谱平坦的宽带涂层,频谱覆盖...
The internal ring in layer II can greatly affect the performance of this absorber. In the high-frequency bands, the internal ring sways the huge reflectivity, producing a strong reflection effect similar to that of a copper plane. Therefore, the internal ring plays a decisive role in ...
Metamaterials have enabled the design of electromagnetic wave absorbers with unprecedented performance. Conventional metamaterial absorbers usually employ multiple structure components in one unit cell to achieve broadband absorption. Here, a simple metasurface microwave absorber is proposed that has one metal-...