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Anisotropy studied by polarization-modulated fourier transform infrared reflection difference microspectroscopy

MPG-Autoren
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Grunze,  Michael
Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

Externe Ressourcen

https://doi.org/10.1366/000370208783575500
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Zitation

Schmidt, M., Lee, J. S., Grunze, M., Kim, K. H., & Schade, U. (2008). Anisotropy studied by polarization-modulated fourier transform infrared reflection difference microspectroscopy. Applied Spectroscopy, 62(2), 171-175. doi:10.1366/000370208783575500.


Zitierlink: https://hdl.handle.net/21.11116/0000-0001-9B8F-0
Zusammenfassung
We investigated anisotropic optical behavior in solid-state materials using Fourier transform infrared reflection microspectroscopy in combination with polarization modulation. For a Ca1.8Sr0.2RuO4 crystal with an isotropic optical surface, we found the reflection difference to be very close to zero, independent of the azimuthal angle of the sample. A Ca1.4Sr0.6RuO4 crystal with an anisotropic optical surface, however, exhibited a large anisotropic optical response with a strong angular dependence following a sinusoidal behavior. Furthermore, we examined the spatial distribution of the reflection difference in Bi0.17Ca0.83MnO3+delta using infrared synchrotron radiation and could clearly distinguish microscopic anisotropic domains having different optical axes. These results demonstrate that our experimental scheme can be used as a powerful tool to spectrally and spatially resolve anisotropy of solid-state materials in the mid-infrared region.