Perfectly matched plane wave source in FDTD via efficient and true time-domain update equations

This paper represents a FDTD planewave for any dimensions but evaluated purely in the time-domain. A true FDTD planewave can be derived simply by evoking the defining properties of a planewave. In short, constructing a perfect FDTD planewave needed for the TF/SF Huygen´s boundary amounts to ensuring that a perfect plane wavefront defined by the integer m_i exists within the discrete domain.