  As is known, the existence of a small noncommutativity between coordinates
would generate nonlocal self-interactions in the electromagnetic theory. To
explore some consequences of this effect on the propagation of photons we
consider Moyal space half-filled with a static and homogeneous electric field
and analyze electromagnetic fluctuations on top of this step-like background.
Both the localization of photons and the possibility of photon production by
strong electric fields are addressed. Several aspects of the Klein paradox in
this setup are discussed as well.
