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Holographic Spectroscopy: Wavelength-Dependent Analysis of Photosensitive Materials by Means of Holographic Techniques
School of Physics, Osnabrück University, Barbarastr. 7, Osnabrück 49069, Germany
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Received: 15 November 2012; in revised form: 8 January 2013 / Accepted: 14 January 2013 / Published: 23 January 2013
Abstract: Holographic spectroscopy is highlighted as a powerful tool for the analysis of photosensitive materials with pronounced alterations of the complex permittivity over a broad range in the visible spectrum, due to the advances made both in the fields of advanced holographic media and highly tunable lasers systems. To analytically discuss consequences for in- and off-Bragg reconstruction, we revised Kogelnik’s coupled wave theory strictly on the basis of complex permittivities. We extended it to comply with modern experimental parameters such as out-of-phase mixed holograms and highly modulated gratings. A spatially modulated, wavelength-dependent permittivity that superimposes a spatially homogeneous wavelength-dependent ground state spectrum is taken into account for signal wave reconstruction with bulky elementary mixed gratings as an example. The dispersion characteristics of the respective diffraction efficiency is modelled for color-center-absorption and absorption of strongly localized carriers. As an example for the theoretical possibilities of our newly derived set of equations, we present a quantitative analysis of the Borrmann effect connected to out-of-phase gratings, providing easier and more intuitive methods for the derivation of their grating parameters.
Keywords: holographic spectroscopy; holographic materials; coupled-wave theory; mixed gratings; out-of-phase gratings; Borrmann effect; beam-coupling analysis; diffraction efficiency
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MDPI and ACS Style
Voit, K.-M.; Imlau, M. Holographic Spectroscopy: Wavelength-Dependent Analysis of Photosensitive Materials by Means of Holographic Techniques. Materials 2013, 6, 334-358.
Voit K-M, Imlau M. Holographic Spectroscopy: Wavelength-Dependent Analysis of Photosensitive Materials by Means of Holographic Techniques. Materials. 2013; 6(1):334-358.
Voit, Kay-Michael; Imlau, Mirco. 2013. "Holographic Spectroscopy: Wavelength-Dependent Analysis of Photosensitive Materials by Means of Holographic Techniques." Materials 6, no. 1: 334-358.