Second-order nonlinearities in the domain walls of periodically poled KTiOPO4
2004 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 85, no 3, 375-377 p.Article in journal (Refereed) Published
The domain wall regions in periodically poled KTiOPO4 crystals were examined and found to give rise to phasematched second harmonic generation in the Cerenkov directions. This phenomenon is caused by the nonlinear coefficients d(11) and d(12), which are not present in single domain regions, but are nonzero at and close to domain walls. The appearance of these nonlinearities is attributed to strain, produced by the domain inversion process and results in the creation of a dc piezoelectric field.
Place, publisher, year, edition, pages
2004. Vol. 85, no 3, 375-377 p.
Ferroelectricity, Laser beams, Optical waveguides, Q switched lasers, Refractive index, Second harmonic generation, Transmission electron microscopy, X ray diffraction, Electric field poling, Electrostatic energy, Ferroelectric domain, Spatial coherence
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-23575DOI: 10.1063/1.1775031ISI: 000222680400009ScopusID: 2-s2.0-4043119651OAI: oai:DiVA.org:kth-23575DiVA: diva2:342274
QC 20100525 QC 201109262010-08-102010-08-102015-03-30Bibliographically approved