title: Consequences of the Kramers-Kronig relations for light diffraction on thick gratings.
abstract: Diffraction of monochromatic light on a grating leads to the attenuation of the transmitted beam of diffraction order zero. In the case of a thick grating the diffraction efficiency, and hence the effective attenuation coefficient, is a fast-varying function of the Bragg mismatch angle. According to Kramers-Kronig theory, the transmitted beam encounters a phase shift that also depends on the mismatch angle. This phase shift is measured for holographic gratings in a photoaddressable block copolymer and compared with analytical calculations.
authors.affiliation: Institute of Physics and Bayreuther Institut für Makromolekülforschung, University of Bayreuth, D-95440 Bayreuth, Germany. michael.haeckel@uni-bayreuth.de
authors.forename: Michael
authors.initials: M
authors.lastname: Häckel
authors.forename: Lothar
authors.initials: L
authors.lastname: Kador
authors.forename: Carsten
authors.initials: C
authors.lastname: Frenz
authors.forename: Hans-Werner
authors.initials: HW
authors.lastname: Schmidt