LAUSR

Summary A single-band terahertz (THz) high performance metasurface absorber is designed and verified based on the ohmic loss of the cross-shaped metal array. In the first set of experiments, three samples with structural parameters w = 2.4 μ m , w = 3.8 μ m , and w = 4.2 μ m are prepared and measured. The absorption peak is enhanced from 80.2% to 96.8%, and the resonance frequency is reduced from 35.96THz to 31.06THz. In the second set of experiments, three other samples with structural parameters L = 8.0 μ m , L = 8.4 μ m , and L = 8.8 μ m are prepared and measured (other structural parameters remained unchanged, and the test conditions remained unchanged). The absorption peak is increased from 80.2% to 88.8%, and resonance frequency is shifted to 27.28THz. In the third set of experiments, samples with structural parameters w = 2.4 μ m are placed in three different gases. Three high sensitivities are achieved by this samples: S N O = 1421 H z / R I U , S C O = 1674 H z / R I U , and S C O 2 = 1897 H z / R I U . This proposed metasurface absorber shows the potential in gas sensing.