In this study, the authors present a single-band tunable metamaterial absorber in the 3.00–6.00 THz region. This absorption peak (90.00% amplitude) is excited by the cavity resonance at the resonance frequency of 4.55 THz. The cavity resonance mode is achieved in the spacer cavity formed by the metal/strontium titanate (STO)/SU-8 photoresist (SU-8)/STO/metal layers. The effect of structural parameters on this absorption peak is measured in two groups of experiments. As the diameter of holes array D increases, the cavity resonance peak is enhanced to 94.00% and shifted to 4.79 THz. However, for the increase in the thickness of the SU-8 layer T3, this peak is increased to 98.00% and moved to 3.88 THz. To verify the dual detection functions, two sets of experiments are carried out. In the third set of experiments, this absorption peak is increased to 99.80% and shifted to 5.60 THz with the increasing environmental temperature. In the fourth set of experiments, samples are covered by three liquids, and both the absorption amplitude and the resonance frequency are reduced. This tunable metamaterial absorber shows possibilities for applications in environmental temperature sensing and liquid sensing.

中文翻译：

---

可调谐超材料的设计与验证及其传感应用

在这项研究中，作者提出了在3.00–6.00 THz范围内的单波段可调谐超材料吸收器。该吸收峰（振幅为90.00％）在4.55 THz的共振频率下由腔共振激发。在由金属/钛酸锶（STO）/ SU-8光致抗蚀剂（SU-8）/ STO /金属层形成的间隔腔中实现腔共振模式。在两组实验中测量了结构参数对该吸收峰的影响。作为孔的直径排列d腔共振峰增加到94.00％，并移到4.79 THz。但是，随着SU-8层T3厚度的增加，该峰值增加到98.00％，并移动到3.88 THz。为了验证双重检测功能，进行了两组实验。在第三组实验中，随着环境温度的升高，该吸收峰增加至99.80％，并移至5.60 THz。在第四组实验中，样品被三种液体覆盖，吸收幅度和共振频率都降低了。这种可调节的超材料吸收器显示出在环境温度感测和液体感测中的应用可能性。