Primordial Metamaterials (2506.21359v1)

Abstract: The electromagnetic response of materials serves as the foundation for a broad range of vital applications, including but not limited to imaging, sensing, as well as classical and quantum communications. Here we demonstrate, theoretically and experimentally, a fundamentally new regime of electromagnetic material response originating from inherent material nonlocality, leading to effective spooky action at a distance''. We show that by structuring materials on the scale of their inherent nonlocality, it becomes possible to reveal theprimordial'' nonlocal response of the components and design materials with strong overall nonlocality, easily detectable at room temperatures and in realistic (lossy) materials. Designer primordial nonlocality offers a new dimension in controlling light-matter interactions.