Scanning electro-optical and pyroelectrical microscopy for the investigation of polarization patterns in poled polymers

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Abstract
Compact and simple experimental setups for scanning pyroelectrical and electro‐optical microscopy are introduced. Their feasibility is demonstrated with scans of periodically poled layers of a nonlinear optical side‐chain polymer. While the scanning pyroelectrical microscope has a less complex design and is easier to use, the scanning electro‐optical microscope exhibits better spatial resolution and higher contrast. Both tools will be essential for optimizing the patterned poling of nonlinear optical waveguides,modulators, and sensors.