| Publication No: 3634 | Search all ORC publications |
UV laser-induced ferroelectric domain structures investigated by piezoresponse force microscopy
T.Jungk, A.Hoffmann, E.Soergel
Institute of Physics, University of Bonn, Wegelerstrase 8, 53115 Bonn, Germany
S.Mailis, A.C.Muir, I.T.Wellington, C.E.Valdivia, C.L.Sones, R.W.Eason
Optoelectronics Research Centre, University of Southampton, UK
Abstract
Ferroelectric domains have been generated on the +z and the -z faces of congruent undoped lithium niobate (LiNbO3) single crystals by direct UV writing using a continuous wave (c.w.) frequency doubled argon ion laser (lambda = 244 nm). The width of the domains was observed to depend on the intensity of the laser beam. Interestingly, also the contrast of the domains seen by piezoresponse force microscopy (PFM) [1] was observed to increase with higher laser intensity. The contrast difference could be attributed to a difference of the depth of these surface domains as the depth sensitivity of the PFM is ~1 μm for LiNbO3.
CLEO-Europe/IQEC Munich 17-22 Jun (2007)
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Copyright University of Southampton 2006