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Temperature Tunable Seven Band Terahertz Metamaterial Absorber Using Slotted Flower–Shaped Resonator on an InSb Substrate
Plasmonics ( IF 3 ) Pub Date : 2021-01-06 , DOI: 10.1007/s11468-020-01329-x
Bhargav Appasani

Development of metamaterial absorbers that can operate in the terahertz spectrum has become the latest research interest of the electromagnetic fraternity. Temperature tunable absorbers are a special type of absorbers whose absorption spectra shift with the temperature. Initially, single-band and dual-band temperature tunable absorbers were designed and with progressive research in this field more sophisticated designs with multi-band absorption spectra are being developed. In this paper a seven-band temperature tunable terahertz metamaterial absorber is proposed, whose unit cell consists of a slotted flower–shaped resonator (S-FSR) on InSb dielectric substrate. The peak absorption’s offered by the structure at 210 K are 99.12% at 0.895 THz, 97.63% at 1.042 THz, 96.97% at 1.268 THz, 99.7% at 1.401 THz, 89.37% at 1.551 THz, 97.57% at 1.646 THz, and 94.89% at 1.831 THz. Its temperature sensitivity is found to be 12.6 GHz/K, 10.9 GHz/K, 9.2 GHz/K, 8.2 GHz/K, 7.7 GHz/K, 7.2 GHz/K, and 6.5 GHz/K respectively. The novel design has several applications in the design of terahertz temperature sensors.



中文翻译:

在InSb基板上使用开槽花形谐振器对温度可调的七波段太赫兹超材料吸收器

可以在太赫兹光谱下工作的超材料吸收器的开发已经成为电磁博爱的最新研究兴趣。温度可调吸收器是一种特殊类型的吸收器,其吸收光谱随温度变化。最初,设计了单波段和双波段温度可调吸收器,并且随着该领域的不断研究,正在开发具有多波段吸收光谱的更复杂的设计。本文提出了一种七波段温度可调谐太赫兹超材料吸收体,该吸收体的晶胞由在InSb介质衬底上的开缝花形谐振器(S-FSR)组成。该结构在210 K时提供的峰值吸收在0.895 THz时为99.12%,在1.042 THz时为97.63%,在1.268 THz时为96.97%,在1.401 THz时为99.7%,在1.551 THz时为89.37%,在1.646 THz时为97.57%,在1.831 THz时为94.89%。发现其温度灵敏度分别为12.6 GHz / K,10.9 GHz / K,9.2 GHz / K,8.2 GHz / K,7.7 GHz / K,7.2 GHz / K和6.5 GHz / K。新颖的设计在太赫兹温度传感器的设计中有多种应用。

更新日期:2021-01-06
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