Fresnel polarisation of infra-red radiation by elemental bismuth Bruno S.C. Alexandre, Luís C. Martins, Jaime E. Santos, António J. Pontes and Nuno M.R. Peres Eur. Phys. J. B, 93 6 (2020) 119 Published online: 24 June 2020 DOI: 10.1140/epjb/e2020-10090-9