Abstract
In this work, we demonstrate the application of micro-Raman spectroscopy for the investigation of the neutral and charged domain walls in the congruent and MgO-doped lithium niobate single crystals. We present local changes of the intensity and frequency of three Raman lines in the vicinity of the domain walls and discuss the influence of the bulk screening of depolarization field on these parameters.
Acknowledgments
The research was made possible in part by RFBR (grants 08-02-12173-ofr, 08-02-90434-Ukr_a, 10-02-96042-r-Ural-a, 10-02-00627-a), by Federal Agency of Education (contract P870), by Federal Agency of Science and Innovation (contracts 02.74011.0171 and 02.552.11.7069), U.S. CRDF BRHE & FAE (PhD Award RNP 2.2.2.3.16019/Y5-P-05-10), by RFBR-CNRS (Grant 05-02-19648), by ARCUS project initiated by Ministry of Foreign Affairs of France and the Regional Council of Lorraine and National Centre of Science Researches of France (CNRS).