Electromagnetically induced transparency metamaterial based on spoof localized surface plasmons at terahertz frequencies.
We numerically and experimentally demonstrate a plasmonic metamaterial whose unit cell is composed of an ultrathin metallic disk and four ultrathin metallic spiral arms at terahertz frequencies, which supports both spoof electric and magnetic localized surface plasmon (LSP) resonances. We show that the resonant wavelength is much larger than the size of the unit particle, and further find that the resonant wavelength is very sensitive to the particle's geometrical dimensions and arrangements. It is clearly illustrated that the magnetic LSP resonance exhibits strong dependence to the incidence angle of terahertz wave, which enables the design of metamaterials to achieve an electromagnetically induced transparency effect in the terahertz frequencies. This work opens up the possibility to apply for the surface plasmons in functional devices in the terahertz band.
State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
Zhen
Z
Liao
State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
Shuo
S
Liu
State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China.|Synergetic Innovation Center of Wireless Communication Technology, Southeast University, Nanjing, 210096, China.
Hui Feng
HF
Ma
Cooperative Innovation Centre of Terahertz Science, No. 4, Section 2, North Jianshe Road, Chengdu 610054, China.|Research Institute of Superconductor Electronics, School of Electronics Science and Engineering, Nanjing University, Nanjing 210093, China.
Chun
C
Li
Cooperative Innovation Centre of Terahertz Science, No. 4, Section 2, North Jianshe Road, Chengdu 610054, China.|Research Institute of Superconductor Electronics, School of Electronics Science and Engineering, Nanjing University, Nanjing 210093, China.
Biaobing
B
Jin
State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China.|Cooperative Innovation Centre of Terahertz Science, No. 4, Section 2, North Jianshe Road, Chengdu 610054, China.
Tie Jun
TJ
Cui