Full-Wave Simulation of a 10,000-Element Reconfigurable Intelligent Surface with a Single Workstation Computer

Nowadays, extensive research conducted on electromagnetic materials has led to many innovative devices and systems. While the potentials of advanced materials and their applications are appealing, it is often difficult to model them accurately by computational methods due to the inherently multiscale, complex structures involved. We propose a metamaterial Green's function with the geometry-aware domain decomposition method for modeling complex, heterogeneous materials. The outcome results in quasi-sublinear algorithms, in which the computational complexity does not depend on the microscopic size of metamaterial structures. The results have the potential to make the high-fidelity analysis of metamaterials and metasurfaces orders of magnitude faster.