Solving an old puzzle: fine structure of diffraction spots from an azo-polymer surface relief grating

  title={Solving an old puzzle: fine structure of diffraction spots from an azo-polymer surface relief grating},
  author={Joachim Jelken and Carsten Henkel and Svetlana A Santer},
  journal={Applied Physics B},
We report on the experimental and theoretical interpretation of the diffraction of a probe beam during inscription of a surface relief grating with an interference pattern into a photo-responsive polymer film. For this, we developed a set-up allowing for the simultaneous recording of the diffraction efficiency (DE), the fine structure of the diffraction spot and the topographical changes, in situ and in real time while the film is irradiated. The time dependence of the DE, as the surface relief… 

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