Consequences of the Kramers-Kronig relations for light diffraction on thick gratings.
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.
Häckel
Michael
M
Institute of Physics and Bayreuther Institut für Makromolekülforschung, University of Bayreuth, D-95440 Bayreuth, Germany. michael.haeckel@uni-bayreuth.de
Kador
Lothar
L
Frenz
Carsten
C
Schmidt
Hans-Werner
HW