Selective poling of nonlinear optical polymer films by means of a monoenergetic electron beam

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Abstract
Electron beams with an energy of 10 keV were employed for selectively poling only the lower part of a typical nonlinear optical guest/host polymer at a temperature of 90 °C. The resulting dipole orientation was examined by means of electro‐optical measurements and thermally stimulated depolarization, while the nonuniform charge and polarization profiles were probed with laser‐induced pressure pulses and thermal waves. The concept of nonlinear optical frequency conversion with simultaneous mode conversion is described as an example for the advantages of such a selective poling process.