Spectroscopic characterisation of the upconversion avalanche mechanism in Pr3+, Yb3+: BaY2F8

Anno: 2003

Autori: Osiac E., Kück S., Heumann E., Huber G., Sani E., Toncelli A., Tonelli M.

Affiliazione autori: Institut für Laser-Physik, Luruper Chaussee 149, Geb. 64, 22761 Hamburg, Germany; Institute of Atomic Physics, P.O. Box MG-6, 76900 Bucharest, Romania; Phys.-Technische Bundesanstalt, Section 4.11, Bundesallee 100, 38116 Braunschweig, Germany; NEST-INFM, Dipartimento di Fisica, Universita

Abstract: The paper presents the spectroscopic investigation of Pr3+,Yb3+:BaY2F8 and the characteristics of the upconverted emission from the (3)p(0) level due to an avalanche mechanism under infrared excitation around 820 and 870 nm. Absorption and emission measurements at 12 K were performed in order to refine the Stark level scheme. Room temperature absorption.. emission, excitation spectra, and excited state absorption measurements were performed and analysed in order to investigate the properties of the avalanche mechanism and to determine the spectroscopic parameters of this system. Based on the determined spectroscopic parameters a system of differential equations was established in order to describe the observed avalanche mechanism. (C) 2003 Elsevier B.V. All rights reserved.

Giornale/Rivista: OPTICAL MATERIALS

Volume: 24 (3)      Da Pagina: 537  A: 545

Maggiori informazioni: This study was supported by the German DFG Project: HU435/3-3 and KU11458/4-1 in collaboration with DFG Graduiertenkolleg no. 463 at the University of Hamburg. The authors wish to thank Ilaria Grassini and Francesca Traverso for their skill and competence in growing and preparing the samples.
Parole chiavi: Absorption; Barium compounds; Differential equations; Particulate emissions; Praseodymium; Spectroscopy; Ytterbium, Avalanche mechanism, Crystals
DOI: 10.1016/S0925-3467(03)00089-2

Citazioni: 26
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28
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