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数值仿真研究了一种可调谐的双开口谐振环(DSRR)超材料.在平行入射的电磁波激励下,这种DSRR单元可以在不同的频段分别表现出磁谐振和电谐振.当外加电场E与DSRR的双开口平行时,DSRR受激励得到的磁谐振和电谐振强度最大.随着DSRR超材料沿外加磁场H方向顺时针旋转,其磁谐振和电谐振频率基本保持不变,但谐振强度均发生显著下降,同时对应透射相位的突变也逐渐降低.提出的超材料调谐方法只需要简单地旋转材料,而不需要改变原有超材料单元的结构或者增加额外的激励场,极大地简化了可调谐超材料的制备及应用,在电磁开关、相位调制等方面具有潜在的应用.同时,这种简单的方法有希望应用于更高频段的超材料调谐,可以有效地拓展太赫兹频段和光频段超材料的实际应用.We study the tunable resonance characteristics of double split ring resonator (DSRR) at microwave band numerically. For the incident electromagnetic wave parallel to the incident plane, the DSRR structure shows magnetic and electric resonances at different frequencies respectively. When the E polarization along the two splits of the DSRR, the magnetic and the electric resonances have the strongest resonant intensities. As the DSRR metamaterial rotates along the H field, the frequencies of magnetic and electric resonances are kept unchanged, however, the resonant intensities decrease rapidly. The tunable metamaterial proposed in this paper only need rotate the metamaterial without structure changes or additional applied field, and has potential applications in electromagnetic switch and phase modulation. This simple tunable method could be used for higher frequency metamaterial, and expend the applications at terahertz and optical frequencies.
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Keywords:
- metamaterials /
- split ring resonator /
- tunability
[1] Veselago V G 1968 Sov. Phys. Usp. 10 509
[2] Shelby R, Smith D R, Schulrz S 2001 Science 292 77
[3] Chen H S, Ran L X, Huangfu J T, Zhang X M, Chen K S, Grzegorczyk T M, Kong J A 2004 Phys. Rev. E 70 057605
[4] Dong Z G, Xu M X, Lei S Y, Liu H, Li T, Wang F M, Zhu S N 2008 Appl. Phys. Lett. 92 064101
[5] Dong Z G, Liu H, Li Tao, Zhu Z H, Wang S M, Cao J X, Zhu S N, Zhang X 2008 Opt. Express 16 20974
[6] Zhou J F, Zhang L, Tuttle G, Koschny T, Soukoulis C M 2006 Phys. Rev. B 73 041101
[7] Zhu W R, Zhao X P, Guo J Q 2009 Appl. Phys. Lett. 106 093511
[8] Zhu W R, Zhao X P 2008 J. Appl. Phys. 92 241116
[9] Kafesaki M, Tsiapa I, Katsarakis N, Koschny T, Soukoulis C M, Economou E N 2007 Phys. Rev. B 75 235114
[10] Sun M Z, Zhang C M, Song X P, Liang G Y, Sun Z B 2009 Acta Phys. Sin. 58 6179 (in Chinese) [孙明昭、张淳民、宋晓平、梁工英、孙占波 2009 58 6179 Zhang C M, Sun M Z, Yuan Z L, Song X P 2009 Acta Phys. Sin. 58 1758 (in Chinese) 〖张淳民、孙明昭、袁志林、宋晓平 2009 58 1758]
[11] Schurig D, Mock J J, Justice B J, Cummer S A, Pendry J B, Starr A F, Smith D R 2006 Science 314 977
[12] Ma H, Qu S B, Xu Z, Zhang J Q, Wang J F 2009 Chin. Phys. B 18 1025
[13] Landy N I, Sajuyigbe S, Mock J J, Smith D R, Padilla W J 2008 Phys. Rev. Lett. 100 207402
[14] Zhu W R, Zhao X P 2009 J. Opt. Soc. Am. B 26 2382
[15] Shadrivov I V, Morrison S K, Kivshar Y S 2006 Opt. Express 14 9344
[16] Degiron A, Mock J J, Smith D R 2007 Opt. Express 15 1115
[17] Zhao Q, Kang L, Du B, Li B, Zhou J 2007 Appl. Phys. Lett. 90 011112
[18] Kang L, Zhao Q, Zhao H J, Zhou J 2008 Appl. Phys. Lett. 93 171909
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[1] Veselago V G 1968 Sov. Phys. Usp. 10 509
[2] Shelby R, Smith D R, Schulrz S 2001 Science 292 77
[3] Chen H S, Ran L X, Huangfu J T, Zhang X M, Chen K S, Grzegorczyk T M, Kong J A 2004 Phys. Rev. E 70 057605
[4] Dong Z G, Xu M X, Lei S Y, Liu H, Li T, Wang F M, Zhu S N 2008 Appl. Phys. Lett. 92 064101
[5] Dong Z G, Liu H, Li Tao, Zhu Z H, Wang S M, Cao J X, Zhu S N, Zhang X 2008 Opt. Express 16 20974
[6] Zhou J F, Zhang L, Tuttle G, Koschny T, Soukoulis C M 2006 Phys. Rev. B 73 041101
[7] Zhu W R, Zhao X P, Guo J Q 2009 Appl. Phys. Lett. 106 093511
[8] Zhu W R, Zhao X P 2008 J. Appl. Phys. 92 241116
[9] Kafesaki M, Tsiapa I, Katsarakis N, Koschny T, Soukoulis C M, Economou E N 2007 Phys. Rev. B 75 235114
[10] Sun M Z, Zhang C M, Song X P, Liang G Y, Sun Z B 2009 Acta Phys. Sin. 58 6179 (in Chinese) [孙明昭、张淳民、宋晓平、梁工英、孙占波 2009 58 6179 Zhang C M, Sun M Z, Yuan Z L, Song X P 2009 Acta Phys. Sin. 58 1758 (in Chinese) 〖张淳民、孙明昭、袁志林、宋晓平 2009 58 1758]
[11] Schurig D, Mock J J, Justice B J, Cummer S A, Pendry J B, Starr A F, Smith D R 2006 Science 314 977
[12] Ma H, Qu S B, Xu Z, Zhang J Q, Wang J F 2009 Chin. Phys. B 18 1025
[13] Landy N I, Sajuyigbe S, Mock J J, Smith D R, Padilla W J 2008 Phys. Rev. Lett. 100 207402
[14] Zhu W R, Zhao X P 2009 J. Opt. Soc. Am. B 26 2382
[15] Shadrivov I V, Morrison S K, Kivshar Y S 2006 Opt. Express 14 9344
[16] Degiron A, Mock J J, Smith D R 2007 Opt. Express 15 1115
[17] Zhao Q, Kang L, Du B, Li B, Zhou J 2007 Appl. Phys. Lett. 90 011112
[18] Kang L, Zhao Q, Zhao H J, Zhou J 2008 Appl. Phys. Lett. 93 171909
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