The photobleaching properties of a 3D memory material based on pyrylium salts are studied. It is shown that under ultrashort pulsed irradiation photobleaching occurs through two diverse mechanisms. One is major and causes fast bleaching, whereas the other is minor and causes slow bleaching. Furthermore, it is proved that both mechanisms are three- or more-photon processes. This fact gives the capability of significantly increasing data storage density.
© 2005 Optical Society of America
I. Polyzos, G. Tsigaridas, M. Fakis, V. Giannetas, and P. Persephonis, "Three-photon induced photobleaching in a three-dimensional memory material," Opt. Lett. 30, 2654-2656 (2005)