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Superconducting terahertz metamaterials mimicking electromagnetically induced transparency
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) The planar geometry of three-level EIT-like system. The geometric parameters are set to be p = 120 μm, l = 64 μm, w = 48 μm, s = 4 μm, t 1 = t 2  = 8 μm, g = 15 μm, d = 90 μm. The incident direction of radiation is normal to the plane and the polarized electric field is parallel to the right metal stripe. (b) The planar geometry of four-level EIT-like system. It shares the same parameters as the left one except l 1 = 72 μm, l 2 = 56 μm, px  = 200 μm, and py  = 120 μm.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Transmission spectra for the three-level EIT-like MMs at various temperatures. (b) Measured frequency and maximum transmittance of transparency window as a function of temperature. (c) Group delay spectra at various temperatures. (d) THz pulse measured in time domain after transmitting though bare MgO substrate or sample at 8 K (vertically shifted by 0.1) and 16 K (vertically shifted by 0.2).

Image of FIG. 3.
FIG. 3.

(Color online) Measured (a) transmission and (b) phase spectra for the four-level EIT-like MMs at various temperatures. The 2D surface current distribution plots at the frequencies of (c) transparency window a and (d) transparency window b.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Superconducting terahertz metamaterials mimicking electromagnetically induced transparency