Broadband and high transmission multifunctional metasurface based on temperature-tunable InSb

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

“…[93,96,[476][477][478][479][480] Importantly, VO 2 has two outstanding advantages: [93,96,[476][477][478][479][480] First, the conductivity of VO 2 is capable of multiple orders of magnitude variation; Second, its phase transition is reversible that could offer a new path to adjust the spectral properties of metamaterials. Therefore, this section first presents the dynamic modulation of VO 2 -based BMAs and then discusses BMAs with thermally tunable properties based on GST, [481][482][483][484][485][486][487][488][489] indium antimonide (InSb), [490,491] strontium titanate (STO), [492,493] nanocomposites, [494] and water. [452,[495][496][497][498][499] A thermally tuned BMA based on the phase transition properties of VO 2 was developed.…”

“…[488] The introduction of new computer techniques, such as machine learning, has made it possible to predict the absorption performance. [489] In addition to phase change materials, there are also some temperature sensitive active materials, such as InSb, [490,491] STO, [492,493] and nanocomposites, [494] and the introduction of them into MA system could also provide the ability to tune their absorption performance actively. For example, a circularly polarization-sensitive THz MA using unpatterned InSb film on top of Cu substrate was presented to modulate its absorption performance by changing the magnetostatic bias, and ambient temperature, [490] and the resonance frequency of the designed THz device shows a strong dependence on the external temperature change.…”

“…Wu et al introduced the principle of discrete transmission phase and InSb, which could be used to achieve full phase coverage in the frequency range of 0.75-0.95 THz to design a series of broadband temperature controlled transmission functions. [491] It is shown that the realization of broadband absorption based on InSb material is still of high research value.…”

Fano resonance characteristics of a silicon notched disk metasurface-waveguide system under different polarization conditions

“…Metasurfaces are arrays of artificial subwavelength nanostructures that can localize the electromagnetic (EM) fields at the nanoscale or manipulate the far-field scattering, which can realize a variety of novel physical properties, such as negative refractive index [1,2], near-zero refractive index [3], abnormal reflection and transmission [4,5], and Fano resonance. The Fano resonance originates from the destructive interference between the bright and dark modes excited in the near-field [6][7][8][9], which can give rise to huge field enhancement and sharp resonant profiles with high Q factors.…”