Abstract

Lithium Niobate is a ferroelectric material, which is widely used in nonliear and electro-optical devices. In such application the materials is often prepared with the specific patterns of up or down ferroelectric domains. The region between an up and a down domain (“domain wall region”) is of great importance because it ultimately limits the size of the patterns. Theoretical and experimental reports vary in their results regarding the size of the wall. While theoretically the wall region is expected to be confined within a few lattice sites [1], experimental results show effects to several microns from the wall. We use Raman spectroscopy to investigate the domain wall to gain a better understanding of the modification of the crystal lattice across a domain wall.

© 2009 IEEE