Zhong Min
Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou Key Laboratory of Microwave Applied Technology, Hezhou University, Hezhou, 542899, China.
Sci Rep. 2020 Nov 16;10(1):19845. doi: 10.1038/s41598-020-77051-9.
A single peak tunable metasurface absorber is proposed and verified in Terahertz (THz) range. This absorption peak is excited by the localized surface plasma (LSP) and dielectric loss modes at resonance frequency 2.98 THz with 83% of amplitude. Three groups of experiments are performed to verify the sensing properties of samples. In the first groups of experiments, temperature is increasing from T = 300 k to T = 400 k, which leads to the absorption peak enhance from 83% (at 2.98 THz) to 93.7% (at 3.5 THz). In the second groups of experiments, samples are covered by ethanol or chloroform (T = 300 k), this absorption peak is also increased and moved to higher frequencies. When temperature and liquid layer are changed simultaneously, samples achieve more intense resonance behaviors in a smaller temperature scale. Finally, this absorption peak is reduced by increasing pump fluence. This proposed tunable metasurface absorber reveals the feasibility of sensing field.
提出并验证了一种在太赫兹（THz）频段的单峰可调谐超表面吸收器。该吸收峰由局域表面等离子体（LSP）和介电损耗模式在共振频率2.98太赫兹处激发，幅度为83%。进行了三组实验来验证样品的传感特性。在第一组实验中，温度从T = 300 K升高到T = 400 K，这导致吸收峰从83%（在2.98太赫兹处）增强到93.7%（在3.5太赫兹处）。在第二组实验中，样品被乙醇或氯仿覆盖（T = 300 K），该吸收峰也增加并向更高频率移动。当温度和液层同时变化时，样品在较小的温度范围内实现更强烈的共振行为。最后，通过增加泵浦通量降低了该吸收峰。这种提出的可调谐超表面吸收器揭示了传感领域的可行性。
