Open AccessFast design of broadband terahertz diffusion metasurfaces
Author(s) -
Jie Zhao,
Qiang Cheng,
Tian Qi Wang,
Wei Yuan,
Tie Jun Cui
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.001050
Subject(s) - terahertz radiation , broadband , optics , fourier transform , scattering , diffusion , inverse , terahertz spectroscopy and technology , materials science , computer science , physics , mathematics , geometry , quantum mechanics , thermodynamics
A method for fast design of broadband terahertz diffusion metasurface is presented. The proposed metasurface is composed by three kinds of simply patterned elements with different resonant properties. To obtain the best broadband performance with the lowest backward reflections, a genetic algorithm is developed to manipulate the resonances for the fast determination of element geometries. An inverse discrete Fourier transform method is used to predict the scattering pattern of the metasurface with high accuracy and low time consumption, significantly enhancing the efficiency of the array-pattern design. The proposed fast design flow will benefit a broad range of terahertz applications, such as biological detection and imaging.