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Plasmon-induced transparency (PIT) is a key addition to mimicking the quantum phenomena of electromagnetically induced transparency (EIT) in atomic systems. So far, various metamaterial structures have been proposed to excite and manipulate the PIT effect. However, most of the reported works were based on 2-D metal structures, and consequently, the PIT phenomena often arise from their electric responses...
Magnetic field and temperature dependence of spin wave excitation and manipulation in RFeO3 (R=Nd) are studied with THz time-domain spectroscopy. Our studies reveal that the spin reorientation transition triggered by external magnetic field is strongly anisotropic: magnetic fields along a-axis is much easier to switch the spin alignment than that along c-axis in NdFeO3 crystal.
We studied a metasurface constituted of a periodic array of semiconductor split-ring resonators. The resonance frequencies were found to be continuously tunable in the terahertz regime through an external magnetostatic field or temperature control.
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