Bistability is reported in sensitized Er<sup>3+</sup> luminescence driven by an Yb<sup>3+</sup> transition that previously revealed an Yb<sup>3+</sup> luminescent instability. To our knowledge this is the first report of bistable energy transfer between different rare-earth ions.
© 2003 Optical Society of America
S. M. Redmond and S. C. Rand, "Intrinsic chromatic switching of visible luminescence in Yb3+,Er3+:CsCdBr3," Opt. Lett. 28, 173-175 (2003)