Abstract
In recent years, novel terahertz (THz) metamaterial sensors are being actively explored by the research community. These structures absorb the incident THz waves, and their absorption spectra shift with the change in the physical parameter. In this paper, a terahertz metamaterial absorber is proposed for sensing both the temperature and the refractive index of the surrounding medium. The unit cell of the proposed structure consists of a concentric hexagonal ring resonator (CHRR) on an indium antimonide (InSb) substrate. The proposed sensor detects the changes in the refractive index with a sensitivity of 1.045 THz/RIU at room temperature, and it can detect the temperature of the surrounding medium having unity refractive index, with a sensitivity of 3.71 GHz/K. It also offers a near-unity absorption of 99.93% at 1.93 THz when the temperature is 300 K, and the refractive index of the surrounding medium is unity. Due to the simple design and dual-sensing capabilities, the proposed sensor can have profound bio-medical applications.
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References
Veselago VG (1968) The electrodynamics of substances with simultaneously negative values of ε and μ. Sov. Phys. Uspekhi 10(4):509–514
Shamonina E, Solymar L (2007) Metamaterials: how the subject started. Metamaterials 1:12–18
Ramakrishna SA, Grzegorczyk TM (2008) Physics and application of negative refractive index materials. CRC Press, Boca Raton
Rhee JY, Yoo YJ, Kim KW, Kim YJ, Lee YP (2014) Metamaterial-based perfect absorbers. J Electromagn Waves Appl 28(13):1541–1580
Yuan S et al (2019) Photoexcited switchable single-/dual-band terahertz metamaterial absorber 6(7):075807
Appasani B et al (2019) A simple multi-band metamaterial absorber with combined polarization sensitive and polarization insensitive characteristics for terahertz applications. Plasmonics 14:737–742
Mohanty A et al (2020) A broadband polarization insensitive metamaterial absorber using petal-shaped structure. Plasmonics 15:2147–2152
Xu W, Lijuan X, Ying Y (2017) Mechanisms and applications of terahertz metamaterial sensing: a review. Nanoscale 9(37):13864–13878
Wang BX, Zhai X, Wang GZ, Huang WQ, Wang LL (2015) Frequency tunable metamaterial absorber at deep-subwavelength scale. Opt Mater Express 5:227–235
Song ZY, Wang K, Li JW, Liu QH (2018) Broadband tunable terahertz absorber based on vanadium dioxide metamaterials. Opt Express 26(6):7148–7154
Zou H, Cheng Y (2019) Design of a six-band terahertz metamaterial absorber for temperature sensing application. Opt Mater 88:674–679
Appasani B (2021) Temperature tunable seven band terahertz metamaterial absorber using slotted flower–shaped resonator on an insb substrate. Plasmonics 16:833–839
Appasani B (2021) An octaband temperature tunable terahertz metamaterial absorber using tapered triangular structures. Prog Electromagn Res Lett 95:9–16
Bagci F (2021) A terahertz metamaterial absorber-based temperature sensor having nine resonance peaks. Gazi Univ J Sci 34:1–15
Li Y et al (2019) Four resonators based high sensitive terahertz metamaterial biosensor used for measuring concentration of protein. J Phys D Appl Phys 52
Saadeldin AS, Hameed MFO, Elkaramany EMA, Obayya SSA (2019) Highly sensitive terahertz metamaterial sensor. IEEE Sens J 19(18):7993–7999
Wang BX, He Y, Lou P, Xing W (2020) Design of a dual-band terahertz metamaterial absorber using two identical square patches for sensing application. Nanoscale Adv 2(2):763–769
Chen J et al (2019) High-quality temperature sensor based on the plasmonic resonant absorber. Plasmonics 14:279–283
Liu G et al (2016) Multi-band high refractive index susceptibility of plasmonic structures with network-type metasurface. Plasmonics 11:677–682
Li Y et al (2019) Grating-assisted ultra-narrow multispectral plasmonic resonances for sensing application. Appl Phys Express 12(7):072002
Aslinezhad M (2020) High sensitivity refractive index and temperature sensor based on semiconductor metamaterial perfect absorber in the terahertz band. Opt Commun 463:125411
Chen F, Cheng Y, Luo H (2020) Temperature tunable narrow-band terahertz metasurface absorber based on insb micro-cylinder arrays for enhanced sensing application. IEEE Access 8:82981–82988
Cheng Y, Li Z, Cheng Z (2021) Terahertz perfect absorber based on InSb metasurface for both temperature and refractive index sensing. Opt Mater 117:111129
Verma VK et al (2020) An octaband polarization insensitive terahertz metamaterial absorber using orthogonal elliptical ring resonators. Plasmonics 15(1):75–81
Li W, Kuang D, Fan F, Chang S, Lin L (2012) Subwavelength B-shaped metallic hole array terahertz filter with insb bar as thermally tunable structure. Appl Opt 51(21):7098–7102
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Appasani, B. A Hybrid Terahertz Metamaterial Sensor Using a Hexagonal Ring Resonator with Bio-medical Applications. Plasmonics 17, 519–524 (2022). https://doi.org/10.1007/s11468-021-01546-y
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DOI: https://doi.org/10.1007/s11468-021-01546-y