title: Reciprocity relations for reflected amplitudes.
abstract: We derive general reciprocity relations that are applicable to a large class of one-dimensional stratified systems. These results reveal clearly the role of absorption and spatial symmetry in the nonreciprocity of reflection observed in a recent experiment by Armitage et al. [Phys. Rev. B 58, 15, 376 (1998)]. We also present examples of structures for which such nonreciprocal effects can be significant.
authors.forename: G S
authors.initials: GS
authors.lastname: Agarwal
authors.forename: S Dutta
authors.initials: SD
authors.lastname: Gupta