Tian JB, Yan CC, Wang C, Han Y, Zou RY, Li DD, Xu ZJ, Zhang DH. Actively tunable Fano resonances based on colossal magneto-resistant metamaterials.
OPTICS LETTERS 2015;
40:1286-1289. [PMID:
25831314 DOI:
10.1364/ol.40.001286]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this Letter, a periodic structure in which each unit cell consists of one manganese oxide (La(0.7)Ca(0.3)MnO(3)) strip and two gold strips is designed. By simulating the electromagnetic responses of the structure, we confirm that Fano resonances can be actively controlled in the infrared region by modulating the intensity of the external magnetic field applied to the structure. This is due to the colossal magneto-resistance of the La(0.7)Ca(0.3)MnO(3) material. Furthermore, a transmission phase can also be effectively tuned. The phase has a shift of ΔΦ=1.05 rad at a frequency of 130 THz when the intensity of the external magnetic field varies from 5083 to 5193 kA/m. Such a tunable method has potential applications in controllable photoelectric elements.
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