Work

Additive Manufactured Multi-Material 3D metasurfaces for broadband achromatic electromagnetic focusing

Year: 2025

Type: article

Abstract: In this paper, a broadband achromatic focusing metasurface design scheme based on the equivalent circuit theory and optimized by deep learning method is proposed. The designed metasurface unit consists of multilayer metal rings and grounding layer, and the phase modulation effect of achromatic aberration in a wide frequency range is realized by precisely controlling the distance between the layers. The preparation of this complex structure is realized by using additive manufacturing technology, which effectively overcomes the limitations of traditional printed circuit board (PCB) technology in manufacturing complex structures. To further improve the design efficiency, Deep Conditional Generative Adversarial Network (DCGAN) is introduced in this paper to quickly determine the structural parameters and realize the inverse design, which significantly improves the efficiency and accuracy of the metasurface structure design. The experimental results show that the metasurface possesses good focusing performance in the 17 to 36 GHz band with an effective bandwidth utilization of 71.69%. The design method proposed in this study combines artificial intelligence and additive manufacturing technology, which provides new design ideas for applications in the fields of communication, optics and wireless energy transmission.

Source: Materials & Design

DOI: 10.1016/j.matdes.2025.114210