University of Electronic Science and Technology of China

Jiawei Long

Jun Qin

Longjiang Deng

Lei Bi

Weihao Yang

The disclosure provides a self-biased magneto-optical non-reciprocal metasurface device. The device includes substrate layer and a sub-wavelength structure layer. The substrate layer is a material layer with a refractive index of 1 to 5 in a microwave frequency band. The sub-wavelength structure layer includes a plurality of square columnar elements arranged in a matrix period with equal period in row and column directions. The square columnar elements include magneto-optical material. The adjustment of phase and amplitude of a circularly polarized electromagnetic wave is achieved by changing the length, width and height of the square columnar elements, and thus the device attains a desired isolation and insertion loss at a center frequency f. The parameters of the magneto-optical material are: coercivity Hc&#x2265;1000 A/m; remanence Br&#x2265;1 kGs; a voigt parameter of a permittivity tensor or permeability tensor in a working frequency band&#x2265;0.01.

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Chengdu, China

Jiawei Long