De-excitation processes of optically excited Nd3+ pairs in CsCdBr3

Cr3+, Nd3+ multisites, pairs and energy transfer processes in laser crystal YAlO3

Detailed spectroscopic studies of YA103:Nd, YAl0,:Cr and YA103:Nd,Cr have shown that these crystals contain up to eight Nd3+ multisites and three C?' ones. C?' 4 Nd3' energy transfer is observed between various multisites and is starting from 2E C? energy level. C? donor decay can be adequately fit with the standard Inokuti-Hirayama theory but an assumption of a spatial correlation between cr3'...

Relaxation of optically excited carriers in graphene

Optically excited nanoscale ultrasonic transducers.

In order to work at higher ultrasonic frequencies, for instance, to increase the resolution, it is necessary to fabricate smaller and higher frequency transducers. This paper presents an ultrasonic transducer capable of being made at a very small size and operated at GHz frequencies. The transducers are activated and read optically using pulsed lasers and without physical contact between the in...

Site-Selective, Intrinsically Bistable Luminescence of Yb31 Ion Pairs in CsCdBr3

Stefan R. Lüthi Department of Chemistry and Biochemistry, The University of Bern, Freiestrasse 3, 3012 Bern, Switzerland (Received 2 December 1998) We report the first observation of intrinsic optical bistability in CsCdBr3:1% Yb31 and show, using site-selective spectroscopy, that only the asymmetric, strongly coupled Yb31 ion-pair minority site gives rise to hysteresis of near-infrared and coo...

The Nd-nanocluster coupling strength and its effect in excitation/de- excitation of Nd3+ luminescence in Nd-doped silicon-rich silicon oxide