title: Designing directional cloaks from localized fields.
abstract: Designs of cloaking devices and more general invisible objects have primarily applied the techniques of transformation optics and scattering cancellation to derive material structures that achieve the desired effects. In this Letter, we note that it is also possible to construct a broader class of invisible objects directly from the defining wave equation. The technique is demonstrated in a scalar formalism with illustrative examples.
authors.forename: Greg
authors.initials: G
authors.lastname: Gbur