This work presents a T‑matrix‑based method for efficiently computing angle‑ and polarization‑resolved thermal emission from metasurfaces. The T‑matrices of individual meta‑atoms were computed using JCMsuite’s finite‑element solver, providing accurate reference data for the scattering response. These pre‑computed T‑matrices were then employed in the treams library to rapidly evaluate thermal emissivity for many lattice configurations, radiation directions, and polarizations, demonstrating a significant speed‑up compared to conventional RCWA or full FEM approaches.
M. Gabbert, et al. Efficient computation of thermal radiation from biperiodic layered systems using the T‑matrix method. arXiv:2508.11590 (2025).