Abstract

It is well known, that intensive laser irradiation leads to the change of internal electric fields in ferroelectrics. Ruby is not a polar crystal and has no spontaneous polarization, but intensive laser light field forms in ruby the ordered structure of electric domains having equal and antiparallel field directions.^[1] This fact and low-temperature nature of this effect distinguish it among known laser-induced effects in dielectrics. The process of formation of domain fields in ruby under intensive laser irradiation within published microscopic models is explained by formation of excess charged chromium ions (Cr²+, Cr⁴⁺) in a sample and its space division at low temperature.

© 1992 IQEC