Periodic domain walls and ferroelastic bubbles in neodymium pentaphosphate

摘要

The first observation of accurately periodic ferroelastic domains in neodymium pentaphosphate (NPP) is reported. A description is given of the nucleation process of these periodic domains in terms of a newly discovered phenomena of ferroelastic bubbles. These periodic arrays have been shown to be tunable from 70 to less than 0.5 mgr;m. Device applications of these arrays as tunable active optical Bragg gratings and acoustic filters are discussed.