Photorefractive BaTiO 3 spheres and spherical disks Damião, Valéria B. ; Fotheringham, Edeline ; Shkunov, Vladimir ; Czaia, Leslie ; Anderson, Dana Z. Abstract Publication: Optics Letters Pub Date: May 2001 DOI: 10.1364/OL.26.000611 Bibcode: 2001OptL...26..611D