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