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Terahertz birefringence for orientation analysis

Christian Jördens, Maik Scheller, Matthias Wichmann, Martin Mikulics, Karin Wiesauer, and Martin Koch

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Abstract

A terahertz time-domain spectrometer is employed to study different birefringent samples. We develop a method based on the temporal waveform and the impulse response of a sample to map the anisotropy of their inner structure. To validate our algorithm, we study the polarization-affecting structure of various classes of materials such as crystals, plastics, and natural products. Among all samples we observe the largest birefringence for a rutile crystal with Δn=3.3 at 1 THz.

© 2009 Optical Society of America

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