Site-Selective, Intrinsically Bistable Luminescence of Yb3+ Ion Pairs in CsCdBr3
Markus P. Hehlen, Amos Kuditcher, Stephen Colby Rand +1 more
We report the first observation of intrinsic optical bistability in ${\mathrm{CsCdBr}}_{3}:1%$ ${\mathrm{Yb}}^{3+}$ and show, using site-selective spectroscopy, that only the asymmetric, strongly coupled ${\mathrm{Yb}}^{3+}$ ion-pair minority site gives rise to hysteresis of near-infrared and cooperative up-conversion luminescence as a function of incident laser intensity below 15 K.
Physical Review Letters•Apr 12, 1999•81 citations