Eigenmode and field imaging of a compact superconducting resonator array

arXiv:2611.13791v1 Announce Type: new Abstract: Superconducting resonator arrays can tailor the photonic environment for quantum information processing, but conventional port-based microwave spectroscopy alone does not resolve the rich spatial structure of their modes. Here, we apply laser scanning microscopy (LSM) and nitrogen-vacancy (NV) center magnetometry to a two-dimensional superconducting resonator array consisting of 33 lumped-element resonators arranged in a honeycomb lattice hosting topological edge states. We demonstrate the complementarity of the two techniques: LSM images the eigenmodes, while NV magnetometry maps the local microwave magnetic field amplitude.