Extraction of effective electromagnetic material properties for Rydberg electrometer vapor cells from 10 to 300 MHzRemoveD. Richardson, J. Dee, J. Yaeger, M. Viray, J. Marsh, B. Kayim, B. C. Sawyer, D. S. La Mantia, R. Wyllie, and R. S. WestaferPhys. Rev. Applied 26, 014075 (2026)