A metamaterial absorber in the Terahertz (THz) range is simulated and experimentally investigated in this work. The desired absorption frequency, efficiency and bandwidth can be tuned by changing the metal and dielectric geometric parameters. An absorption greater than 85% for TM polarized light with an incident angle up to 70˚ at any azimuthal direction is observed in a circular disc THz metamaterial structure. By adjusting the dielectric silicon dioxide (SiO2) thickness to 4 μm, an optimal absorption greater than 95% can be achieved at a resonance frequency of 0.97 THz. The experimental results also indicate that using Titanium (Ti) as a metamaterial metal layer provides four times broader absorption bandwidth than Aluminium (Al). This study, which works on polarization-insensitive and wide-angle metamaterial absorbers, can be fundamentally applied tomany THz applications including THz spectroscopy, imaging, and detection.
2. Hasar, U. C. and J. J. Barroso, "Retrieval approach for determination of forward and backward wave impedances of bianisotropic metamaterial," Progress In Electromagnetics Research, Vol. 112, 109-124, 2011.
doi:10.2528/PIER10112303
3. Belov, P. A., Y. Hao, and S. Sudhakaran, "Subwavelength microwave imaging using an array of parallel conducting wires as a lens," Phys. Rev. B, Vol. 73, 033108, 2006.
doi:10.1103/PhysRevB.73.033108
4. Duan, Z., Y. Wang, X. Mao, W.-X. Wang, and M. Chen, "Experimental demonstration of doublenegative metamaterials partially filled in a circular waveguide," Progress In Electromagnetics Research, Vol. 121, 215-224, 2011.
doi:10.2528/PIER11090502
5. Lee, Y., S. J. Kim, H. Park, and B. Lee, "Metamaterials and metasurfaces for sensor applications," Sensors, Vol. 17, 1726, 2017.
doi:10.3390/s17081726
6. Schurig, D., J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, "Metamaterial electromagnetic cloak at microwave frequencies," Science, Vol. 314, 977-980, 2006.
doi:10.1126/science.1133628
7. Alitalo, P., C. A. Valagiannopoulos, and S. A. Tretyakov, "Simple cloak for antenna blockage reduction," IEEE Int. Antennas Propag. Symposium, 2011.
8. Zou, H. and Y. Cheng, "Design of a six-band terahertz metamaterial absorber for temperature sensing application," Opt. Mater., Vol. 88, 674-679, 2019.
doi:10.1016/j.optmat.2019.01.002
9. Xu, W., L. Xie, J. Zhu, X. Xu, Z. Ye, C. Wang, Y. Ma, and Y. Ying, "Gold nanoparticle-based terahertz metmaterial sensors: Mechanisms and applications," ACS Photonics, Vol. 3, 2308-2314, 2016.
doi:10.1021/acsphotonics.6b00463
10. Wang, B. X., X. Zhai, G. Z. Wang, W. Q. Huang, and L.-L. Wang, "A novel dual-band terahertz metamaterial absorber for a sensor application," J. Appl. Phys., Vol. 117, 014504, 2015.
doi:10.1063/1.4905261
11. Escorcia, I., J. Grant, J. Gough, and D. R. Cumming, "Uncooled CMOS terahertz imager using a metamaterial absorber and pn diode," Opt. Lett., Vol. 41, 3261-3264, 2016.
doi:10.1364/OL.41.003261
12. Landy, N. I., S. Sajuyigbe, J. J. Mock, D. R. Smith, and J. Padilla, "Perfect metamaterial absorber," Phys. Rev. Lett., Vol. 100, 207402, 2008.
doi:10.1103/PhysRevLett.100.207402
13. Tao, H., E. A. Kadlec, A. C. Strikwerda, K. Fan, W. J. Padilla, R. D. Averitt, E. A. Shaner, and X. Zhang, "Microwave and terahertz wave sensing with metamaterials," Opt. Express, Vol. 19, 21620, 2011.
doi:10.1364/OE.19.021620
14. He, X.-J., Y. Wang, J. Wang, T. Gui, and Q. Wu, "Dual-band terahertz metamaterial absorber with polarization insensitivity and wide incident angle," Progress In Electromagnetics Research, Vol. 115, 381-397, 2011.
doi:10.2528/PIER11022307
15. Ding, F., J. Dai, Y. Chen, J. Zhu, Y. Jin, and S. I. Bozhevolnyi, "Broadband near-infrared metamaterial absorbers utilizing highly lossy metals," Scientific Reports, Vol. 6, Article number: 39445, 2016.
16. Liu, Y., S. Gu, and C. Luo, "Ultra-thin broadband metamaterial absorber," Appl. Phys. A, Vol. 108, 19-24, 2012.
doi:10.1007/s00339-012-6936-0
17. Tao, H., N. I. Landy, C. M. Bingham, X. Zhang, R. D. Averitt, and W. J. Padilla, "A metamaterial absorber for the terahertz regime: Design, fabrication and characterization," Opt. Express, Vol. 16, 7181, 2008.
doi:10.1364/OE.16.007181
18. Wen, Q. Y., H. W. Zhang, Y. S. Xie, Q. H. Yang, and Y. L. Liu, "Dual band terahertz metamaterial absorber: Design, fabrication, and characterization," Appl. Phys. Lett., Vol. 95, 241111, 2009.
doi:10.1063/1.3276072
19. Cheng, Y. H., M. L. Huang, H. R. Chen, Z. Z. Guo, X. S. Mao, and R. Z. Gong, "Ultrathin sixband polarization-insensitive perfect metamaterial absorber based on a cross-cave patch resonator for terahertz waves," Materials, Vol. 10, No. 6, 591, 2017.
doi:10.3390/ma10060591
20. Huang, M., Y. Cheng, Z. Cheng, H. Chen, X. Mao, and R. Gong, "Based on graphene tunable dual-band terahertz metamaterial with wide-angle," Opt. Commun., Vol. 415, 194-201, 2018.
doi:10.1016/j.optcom.2018.01.051
21. Luo, H. and Y. Cheng, "Dual-band terahertz perfect metasurface absorber based on bi-layered all dielectric resonator structure," Opt. Mater., Vol. 96, 109279, 2019.
doi:10.1016/j.optmat.2019.109279
22. Ju, Z. D., G. Q. Xu, Z. H. Wei, J. Li, Q. Zhao, and J. Huang, "A single-patterned five-band terahertz metamaterial absorber based on multiple resonance mechanisms," Mod. Phys. Lett. B, Vol. 32, 1850029, 2018.
doi:10.1142/S021798491850029X
23. Wang, B. X., G. Z. Wang, and L. L. Wang, "Design of a novel dual-band terahertz metamaterial absorber," Plasmonics, Vol. 11, 523-530, 2016.
doi:10.1007/s11468-015-0076-2
24. Yahiaoui, R., S. Tan, L. Cong, R. Singh, F. Yan, and W. Zhang, "Multispectral terahertz sensing with highly flexible ultrathin metamaterial absorber," J. Appl. Phys., Vol. 118, 083103, 2015.
doi:10.1063/1.4929449
25. Zhu, J., Z. Ma, W. Sun, F. Ding, Q. He, L. Zhou, and Y. Ma, "Ultra-broadband terahertz metamaterial absorber," Appl. Phys. Lett., Vol. 105, 021102, 2014.
doi:10.1063/1.4890521
26. Wen, Y., W. Ma, J. Bailey, G. Matmon, and X. Yu, "Broadband terahertz metamaterial absorber based on asymmetric resonators with perfect absorption," IEEE Trans. on Terahertz Science and Technology, Vol. 5, 406-411, 2015.
doi:10.1109/TTHZ.2015.2401392
27. Wang, G. D., M. H. Liu, X. W. Hu, L. H. Kong, L. L. Cheng, and Z. Q. Chen, "Broadband and ultra-thin terahertz metamaterial absorber based on multi-circular patches," Eur. Phys. J. B, Vol. 86, 2013.
doi:10.1140/epjb/e2013-40210-5
28. Ju, Z. D., G. Q. Xu, Z. H. Wei, J. Li, Q. Zhao, and J. Huang, "An ultra-broadband terahertz metamaterial absorber based on split ring array and island-shape structures," Mod. Phys. Lett. B, Vol. 32, 1850189, 2018.
doi:10.1142/S0217984918501890
29. Cheng, Y., R. Gong, and Z. Cheng, "A photoexcited broadband switchable metamaterial absorber with polarization-insensitive and wide-angle absorption for terahertz waves," Opt. Commun., Vol. 361, 41-46, 2016.
doi:10.1016/j.optcom.2015.10.031
30. Cheng, Y., R. Gong, and J. Zhao, "A photoexcited switchable perfect metamaterial absorber/reflector with polarization-independent and wide-angle for terahertz waves," Opt. Mater., Vol. 62, 28-33, 2016.
doi:10.1016/j.optmat.2016.09.042
31. Huang, M. L., Y. Z. Cheng, Z. Z. Cheng, H. R. Chen, X. S. Mao, and R. Z. Gong, "Design of a broadband tunable terahertz metamaterial absorber based on complementary structural graphene," Materials, Vol. 11, No. 4, 540, 2018.
doi:10.3390/ma11040540
32. Li, D., H. Huang, H. Xia, J. Zeng, H. Li, and D. Xie, "Temperature-dependent tunable terahertz metamaterial absorber for the application of light modulator," Results Phys., Vol. 11, 659-664, 2018.
doi:10.1016/j.rinp.2018.10.014
33. Zhou, S., Z. Shen, R. Kang, S. Ge, and W. Hu, "Liquid crystal tunable dielectric metamaterial absorber in the terahertz range," Appl. Sci., Vol. 8, 2211, 2018.
doi:10.3390/app8112211
34. Grant, J., Y. Ma, S. Saha, A. Khalid, and D. R. Cumming, "Polarization insensitive, broadband terahertz metamaterial absorber," Opt. Lett., Vol. 36, 3476, 2011.
doi:10.1364/OL.36.003476
35. Hu, F., L. Wang, B. Quan, X. Xu, Z. Li, Z. Wu, and X. Pan, "Design of polarization insensitive multiband terahertz metamaterial absorber," J. Phys. D: Appl. Phys., Vol. 46, 2013.
36. Valagiannopoulos, C. A., A. Tukiainen, T. Aho, T. Niemi, M. Guina, S. A. Tretyakov, and R. Simovski, "Perfect magnetic mirror and simple perfect absorber in the visible spectrum," Phys. Rev. B, Vol. 91, 115305, 2015.
doi:10.1103/PhysRevB.91.115305
37. Papadimopoulos, A. N., N. V. Kantartzis, N. L. Tsitsas, and C. A. Valagiannopoulos, "Wide-angle absorption of visible light from simple bilayers," Appl. Optics, Vol. 56, 9779-9786, 2017.
doi:10.1364/AO.56.009779
38. Ra’di, Y., V. S. Asadchy, and S. A. Tretyakov, "Total absorption of electromagnetic waves in ultimately thin layers," IEEE Trans. Antennas Propag., Vol. 61, 4606-4614, 2013.
doi:10.1109/TAP.2013.2271892
39. Tagay, Z. and C. Valagiannopoulos, "Highly selective transmission and absorption from metasurfaces of periodically corrugated cylindrical particles," Phys. Rev. B, Vol. 98, 115306, 2018.
doi:10.1103/PhysRevB.98.115306
40. Nefedov, I. S., C. A. Valagiannopoulos, and L. A. Melnikov, "Perfect absorption in graphene multilayers," J. Opt., Vol. 15, 114003, 2013.
doi:10.1088/2040-8978/15/11/114003
41. Lei, L., S. Li, H. Huang, K. Tao, and P. Xu, "Ultra-broadband absorber from visible to near-infrared using plasmonic metamaterial," Opt. Express, Vol. 26, 5686, 2018.
doi:10.1364/OE.26.005686
Submit
