We present the design, fabrication and measurment of a dual-resonant broadband terahertz (THz) matamterial based on a modified split-ring resonator (MSRR) structure. The proposed MSRR is constructed by connecting the inner split ring with the outer split ring of adjacent cell. Transmission and reflection characteristics of the proposed structure are simulated using Ansoft HFSS, and the permittivities show negative values in 0.492-0.693 THz and 0.727-0.811 THz bands. The designed sample is fabricated on a gallium arsenide layer, and experiments are performed in Terahertz Time-Domain Spectroscopy. Measured transmission characteristics agree well with the simulations.
2. Chen, H.-T., W. J. Padilla, M. J. Cich, A. K. Azad, R. D. Averitt, and A. J. Taylor, "A metamaterial solid-state terahertz phase modulator," Nature Photonics, Vol. 3, 148-151, 2009.
doi:10.1038/nphoton.2009.3
3. Han, J., A. Lakhtakia, and C.-W. Qiu, "Terahertz metamaterial with semiconductor split-ring resonators for magnetostatic tenability," Opt. Express, Vol. 16, No. 19, 14390-14396, 2008.
doi:10.1364/OE.16.014390
4. Yen, T. J., W. J. Padilla, N. Fang, D. C. Vier, D. R. Smith, J. B. Pendry, D. N. Basov, and X. Zhang, "Terahertz magnetic response from artificial materials," Science, Vol. 303, No. 5663, 1494-1496, 2004.
doi:10.1126/science.1094025
5. Chen, H.-T., W. J. Padilla, J. M. O. Zide, A. C. Gossard, A. J. Taylor, and R. D. Averitt, "Active terahertz metamaterial devices," Nature, Vol. 444, No. 7119, 597-600, Nov. 2006.
doi:10.1038/nature05343
6. Christian, D. and H. B. Peter, "Frequecncy selective surfaces for high sensitivity terahertz sensing," App. Phys. Lett., Vol. 91, No. 18, 184102(1)-184102(3), Aug. 2007.
7. 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, No. 10, 7181-7188, 2008.
doi:10.1364/OE.16.007181
8. 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," App. Phys. Lett., Vol. 95, No. 24, 16527-16534, 2009.
doi:10.1063/1.3276072
9. Lim, C. S., M. H. Hong, Z. C. Chen, N. R. Han, B. Luk'yanchuk, and T. C. Chong, "Hybrid metamaterial design and fabrication for terahertz resonance response enhancement," Opt. Express, Vol. 18, No. 12, 12421-12429, 2010.
doi:10.1364/OE.18.012421
10. Han, N. R., Z. C. Chen, C. S. Lim, B. Ng, and M. H. Hong, "Broadband multi-layer terahertz metamaterials fabrication and characterization on flexible substrates," Opt. Express, Vol. 19, No. 8, 6991-6998, 2011.
doi:10.1364/OE.19.006990
11. Yuan, Y., C. Bingham, T. Tyler, S. Palit, T. H. Hand, W. J. Padilla, D. R. Smith, N. M. Jokerst, and S. A. Cummer, "Dual-band planar electric metamaterial in the terahertz regime," Opt. Express, Vol. 16, No. 13, 9746-9752, 2008.
doi:10.1364/OE.16.009746
12. Yuan, Y., C. Bingham, T. Talmage, S. Palit, T. H. Hand, W. J. Padila, N. M. Jokerst, and S. A. Cummer, "A dual-resonant terahertz metamaterial based on single-particle electric-field-coupled resonators," App. Phys. Lett., Vol. 93, No. 19, 19110(1)-19110(3), 2008.
13. Ekmekci, E., K. Topalli, T. Akin, and G. Turhan-Sayan, "A tunable mult-band metamaterial design using micro-split SRR structures," Opt. Express, Vol. 17, No. 18, 16406-16058, 2009.
doi:10.1364/OE.17.016046
14. Han, J. G., J. Q. Gu, X. C. Lu, M. X. He, Q. R. Xing, and W. L. Zhang, "Broadband resonant terahertz transmission in a composite metal-dielectric structure," Opt. Express, Vol. 17, No. 19, 036617(1)-(11), 2005.
15. Smith, D. R., D. C. Vier, T. Koschny, and C. M. Soukoulis, "Electromagnetic parameter retrieval from inhomogeneous metamaterials," Phys. Rev. E, Vol. 71, 036617(1)-(11), 2005.
16. Chen, Z. C., N. R. Han, Z. Y. Pan, Y. D. Gong, T. C. Chong, and M. H. Hong, "Tunable resonance enhancement of multi-layer terahertz metamaterials fabricated by parallel laser micro-lens array lithography on flexible substrates," Opt. Materials Express, Vol. 1, No. 2, 151-157, 2011.
doi:10.1364/OME.1.000151
17. Ng, B., S. M. Hanham, V. Giannini, Z. C. Chen, M. Tang, Y. E. Liew, N. Klein, M. H. Hong, and S. A. Maier, "Lattice resonances in antenna arrays for liquid sensing in the terahertz regime," Opt. Express, Vol. 19, No. 15, 14653-14661, 2011.
doi:10.1364/OE.19.014653
18. Liu, X.-X., D. A. Powell, and A. Alu, "Correcting the Fabry-Perot artifacts in metamaterial retrieval procedures," Phys. Rev. B, Vol. 84, No. 23, 235106(1)-(7), 2011.
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