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A Newfangled Terahertz Absorber Tuned Temper by Temperature Field Doped by the Liquid Metal
Plasmonics ( IF 3 ) Pub Date : 2020-10-07 , DOI: 10.1007/s11468-020-01296-3
Zi-Long Wang , Cai-Xing Hu , Hou-Bing Liu , Hai-Feng Zhang

In this article, a terahertz absorber tuned by temperature field with a newfangled structure is presented, which comprises the mercury resonators. In this scheme, temperature (T) build-up will lead the mercury stored in the bottom slot to expand through the columniform hole and be full of the upper central cross container, which can transform the absorption bands of such an absorber. The simulated results manifest that when T is increased from 0 to 25 °C, the dual-frequency absorption points (2.59 THz, 3.03 THz) and a narrow absorption region over 90% (6.54–7.10 THz), whose relative bandwidth (RB) is 7.9%, will be tailored to a single-frequency point absorption (3.12 THz) and a broadband absorption area (6.00–7.21 THz, and RB = 18.3%). For figuring out the property of the absorber mentioned above, the impacts of incident and polarization angles along with some relevant parameters of the structure on the absorption property are investigated. In addition, for plainly expounding the physical mechanism of absorption, the distributions of the surface current diagrams of the presented absorber are calculated, as well as the electric field diagrams, the magnetic field diagrams, the power loss density diagrams, and the power flow density diagrams. The proffered scheme in this article may offer a novel idea for realizing the reconfigurable absorbers.



中文翻译:

液态金属掺杂温度场的新型太赫兹吸收体调谐温度

在本文中,提出了一种由温度场调谐的新型结构的太赫兹吸收器,其中包括汞谐振器。在该方案中,温度(T)的累积将导致存储在底部缝隙中的汞通过圆柱状孔膨胀,并充满了上部中央十字容器,这可以改变这种吸收器的吸收带。仿真结果表明,当T当温度从0升高到25°C时,将定制双频吸收点(2.59 THz,3.03 THz)和90%(6.54-7.10 THz)内的窄吸收区域,其相对带宽(RB)为7.9%到单频点吸收(3.12 THz)和宽带吸收面积(6.00–7.21 THz,RB = 18.3%)。为了弄清楚上述吸收体的性质,研究了入射角和偏振角以及结构的一些相关参数对吸收性质的影响。另外,为了清楚地解释吸收的物理机理,计算了所提出的吸收器的表面电流图的分布,以及电场图,磁场图,功率损耗密度图和功率流密度。图。

更新日期:2020-10-07
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