Abstract
We demonstrate a new method of detecting the presence of
ferroelectric domains based on non-phase-matched second-harmonic
generation. If a domain boundary is tilted relative to the input
and output faces of the crystal, the far-field second-harmonic light
consists of multiple beams, in contrast to the single beam generated in
a single-domain crystal. The angular separation of the beams
provides a measure of the tilt of the domain wall if the
refractive-index difference n
2ω -
n
ω is known.
© 1998 Optical Society of America
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