Abstract
We elaborate on a recent paper by Hurwitz and Gbur [Opt. Lett. 39, 6529 (2014) [CrossRef] ], dealing with null-field sources. After commenting on their theory in Minkowski space, we show how the theory can be conveniently generalized to the case of curvilinear space.
© 2015 Optical Society of America
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Elisa Hurwitz and Greg Gbur
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