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Temperature Tunable Seven Band Terahertz Metamaterial Absorber Using Slotted Flower–Shaped Resonator on an InSb Substrate

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Abstract

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.

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  1. Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, India

    Bhargav Appasani

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  1. Bhargav Appasani
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The author has conceived the idea, designed and simulated the structure, obtained the results, and has written the manuscript.

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Correspondence to Bhargav Appasani.

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Appasani, B. Temperature Tunable Seven Band Terahertz Metamaterial Absorber Using Slotted Flower–Shaped Resonator on an InSb Substrate. Plasmonics 16, 833–839 (2021). https://doi.org/10.1007/s11468-020-01329-x

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  • DOI: https://doi.org/10.1007/s11468-020-01329-x

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