Constructing the Near field and Far field with Reactive Metagratings: Study on the Degrees of Freedom
Constructing the Near field and Far field with Reactive Metagratings: Study on the Degrees of Freedom
We report that metamaterial-inspired one-dimensional gratings (or metagratings) can be used to control nonpropagating diffraction orders as well as propagating ones. By accurate engineering of the near field, it becomes possible to satisfy power-conservation conditions and achieve perfect control over all propagating diffraction orders with passive and lossless metagratings. We …