Department of Mathematics2024-12-2920242050-391110.1093/ptep/ptae0082-s2.0-85185813823https://doi.org/10.1093/ptep/ptae008https://hdl.handle.net/20.500.14288/23032For the scattering of plane electromagnetic waves by a general possibly anisotropic stationary linear medium in three dimensions, we give a condition on the permittivity and permeability tensors of the medium under which the first Born approximation yields the exact expression for the scattered wave whenever the incident wavenumber k does not exceed a preassigned value alpha. We also show that under this condition the medium is omnidirectionally invisible for k <= alpha/2, i.e. it displays broadband invisibility regardless of the polarization of the incident wave.WaveguideEigenvaluePhotonicsJournal article1163361500008Q141169