Tittel's team started by channelling one photon of an entangled pair into a crystal of lithium niobate doped with ions of thulium. (newscientist.com)
Investigation on reversed domain structures in lithium niobate crystals patterned by interference lithography S. Grilli, P. Ferraro, S. De Nicola, A. Finizio, G. Pierattini, P. De Natale, and M. Chiarini Optics Express 11, 392 - 405 (2003). (inoa.it)
These strontium niobate compounds show promise for developing advanced electronics because of their «quasi-one-dimensional» metallic conductivity. (sciencedaily.com)