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- W2080611903 abstract "A Mach-Zehnder interferometer (MZI) is used to decouple the electro-optic (EO) and piezoelectric tensorcomponents for a poled polymer film. In the past those using the MZI method failed to take into account thepiezoelectric contribution in the polymer which can lead to erroneous EO coefficient data. The typical poled sample ofpolymer sandwiched between ITO glass and gold that was developed for the popular Teng-Man reflection ellipsometrymethod is used, providing for easy comparison with that method. The sample serves as a mirror in one arm of theinterferometer with the gold side facing the beam for measuring the piezoelectric modulation and the glass side facingthe beam to measure the coupled piezoelectric and EO modulation. Optical biasing in the reference arm allows for thebaseline and modulated contrast of the system to be measured from which the tensor components are calculated. Thismethod has the advantage over the reflection ellipsometry method of allowing for the independent determination of thePockel's coefficients r13 and r33 and the piezoelectric coefficient d33. The r33 value of a guest host polymer that consistsof AJLZ53/amorphous polycarbonate (APC) was found to be 122.7 pm/V and 123.0 pm/V for the MZI and reflectionellipsometry method respectively. The r33 data fits well to the dispersion of the second order susceptibility tensor χ 333 (2)based on the two-level model approximation. Measurements were done from 100 Hz to 100 kHz with the resultsshowing that at higher frequencies the mechanical effects in the sample are negligible and modulation is almost entirelydue to the EO effect, as expected." @default.
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- W2080611903 date "2010-08-19" @default.
- W2080611903 modified "2023-10-16" @default.
- W2080611903 title "Mach-Zehnder interferometry method for decoupling electro-optic and piezoelectric tensor components in poled polymer films" @default.
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- W2080611903 doi "https://doi.org/10.1117/12.862509" @default.
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