title: One-way diffraction grating.
abstract: Diffraction gratings are elementary tools for much of optics and spectroscopy. Here, at microwave frequencies, we provide a new perspective on these fundamental structures. A transmission diffraction grating is presented that has diffracted beams emanating from one surface only. It can thus function either as a transmission grating with no reflected orders (other than zero) or, in the reverse configuration, as a partially transmitting structure with diffracted orders in reflection only.
authors.affiliation: Electromagnetic Materials Group, School of Physics, University of Exeter, Exeter EX4 4QL, United Kingdom.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Lockyear
authors.forename: Alastair P
authors.initials: AP
authors.lastname: Hibbins
authors.forename: Kevin R
authors.initials: KR
authors.lastname: White
authors.forename: J Roy
authors.initials: JR
authors.lastname: Sambles