Research Article Magnetic plasmon induced transparency in three-dimensional metamolecules

In a laser-driven atomic quantum system, a continuous state couples to a discrete state resulting in quantum interference that provides a transmission peak within a broad absorption profi le the so-called electromagnetically induced transpar-ency (EIT). In the fi eld of plasmonic metamaterials, the sub-wavelength metallic structures play a role similar to atoms in nature. The interference of their near-fi eld coupling at plas-monic resonance leads to a plasmon induced transparency (PIT) that is analogous to the EIT of atomic systems. A sensi-tive control of the PIT is crucial to a range of potential appli-cations such as slowing light and biosensor. So far, the PIT phenomena often arise from the electric resonance, such as an electric dipole state coupled to an electric quadrupole state. Here we report the fi rst three-dimensional photonic meta