Observation of Fano resonance and classical analog of electromagnetically induced transparency in toroidal metamaterials |
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| Authors: | Song Han Lonqing Cong Fei Gao Ranjan Singh Helin Yang |
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| Affiliation: | 1. College of physical science and technology, Central China Normal University, Wuhan, China;2. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore;3. Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore |
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| Abstract: | Toroidal multipoles have recently been explored in various scientific communities, ranging from atomic and molecular physics, electrodynamics, and solid‐state physics to biology. Here we experimentally and numerically demonstrate a three‐dimensionsal toroidal metamaterial where two different toroidal dipoles along orthogonal directions have been observed. The chosen toroidal metamaterial also simultaneously supports Fano resonance and the classical analog of electromagnetically induced transparency (EIT) phenomena in the transmission spectra that originate from the electric–toroidal dipole and electric–magnetic dipole destructive interference. The intriguing properties of the toroidal resonances may open up avenues for applications in toroidal moments generator, sensing and slow‐light devices. |
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| Keywords: | toroidal moments Fano resonance electromagnetically induced transparency 3D metamaterial |
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