title: Spectral density of polychromatic electromagnetic waves.
abstract: We investigate theoretically how the vectorial nature of polychromatic electromagnetic fields results in polarization components with different spectral characteristics, thus leading to redshifts, blueshifts, and spectral distributions with multiple peaks. We discuss how these effects can be used to design spatially localized spectra with tailored spectral densities.
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
authors.forename: L E
authors.initials: LE
authors.lastname: Helseth