Six-band rotationally symmetric tunable absorption film based on AlCuFe quasicrystals

In this paper, a six-band rotationally symmetric tunable absorption film based on AlCuFe quasicrystals is proposed. The absorption film has a symmetrically excited electric field, which makes it have good polarization incoherence. After calculating the relative impedance of the absorption film using parameter inversion, it is obvious that the absorption film is consistent with the impedance matching theory. In addition, by changing the physical parameters of the absorption film and adjusting the Fermi energy, it can be found that the absorption film has good tunability. By changing the refractive index of the working environment of the absorption film, it can be seen that the absorption film has extremely high refractive index sensitivity. Overall, the absorption film is tunable, polarization incoherent, and has good sensing performance, which makes the absorption film have strong application prospects in many fields.