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23 April 2019 Retrieving the refractive index profile of a holographic grating by diffraction experiments
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Abstract
It is well known that in standard diffaction experiments only the amplitudes of structural Fourier components are recovered but phase information is lost. This problem is known as the ’phase problem’ in crystallography. In this contribution, we point out how the phase problem of diffraction can be solved in some particular cases by employing multi-wave interference. In the experimental situation described here, we were able to determine the form of the refractive-index profile of a 1-D nanocomposite holographic grating by using a multi-wave coupling analysis of the measured angular dependence of the diffraction efficiencies for a number of diffraction orders.
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© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martin Fally, Jürgen Klepp, Mostafa A. Ellabban, Helmut Eckerlebe, Philipp K. Pranzas, Jinxin Guo, and Yasuo Tomita "Retrieving the refractive index profile of a holographic grating by diffraction experiments", Proc. SPIE 11030, Holography: Advances and Modern Trends VI, 110300I (23 April 2019); https://doi.org/10.1117/12.2527317
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