Abstract
Domain walls in periodically poled ferroelectric LiNbO3 crystals
are observed with both far- and near-field imaging techniques that
make use of second harmonic generation in the transition regions
between neighbouring domains. Second harmonic images of domain
walls represent bright lines of about 0.5 micrometers in width (as
measured with the near-field microscope) for the polarization of
the second harmonic radiation perpendicular to the domain walls.
Origin and selection rules for the constrast in second harmonic
images of domain walls are discussed.
Original language | English |
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Journal | Optics Communications |
Volume | 152 |
Pages (from-to) | 221-224 |
ISSN | 0030-4018 |
Publication status | Published - 1998 |