Design of a terahertz encoding metalens with adjustable focusing intensity
Caihe Lei,
Bo Fang,
Wentao Zhu
et al.
Abstract:This paper presents a terahertz coded metalens with adjustable focusing efficiency. By integrating the phase change material GST-225 with the plasma metasurface and employing the transmission phase principle for phase modulation, flexible control of the single-focus focusing efficiency is achieved. Additionally, a dual-focus focusing metalens is devised. Leveraging the far-field scattering principle of the coded metasurface, the focal angle of the metalens can be adjusted, and it can be expanded to a dual-focu… Show more
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