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Proceedings Paper

Optically stimulated luminescence in Gd-doped fluoroperovskites for color center lasers
Author(s): Karnati Somaiah; M. Venkata Narayana
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Paper Abstract

Optically stimulated luminescence (OSL) of gamma-irradiated undoped KMgF3 showed emission bands at 464 and 534 nm. Incorporation of Gd resulted in new emission bands around 275 and 310 nm. In RbMgF3 four emission bands at 302, 400, 465, 800 and shoulders at 525, and 770 nm are observed, respectively. The strong emission band of Gd at 311 nm is suppressed significantly in OSL process of RbMgF3. The presence of Gadolinium in CsMgF3 suppressed the 300 nm band seen in CsMgF3 and resulted in a strong emission around 312 nm. The OSL emission spectra of LiBaF3 consists of three emission bands and a shoulder at 385, 470, 535, and 415 nm, respectively. Doping of Europium in LiBaF3 suppressed the OSL emission of LiBaF3 and resulted in the characteristic emission of Eu2+ at 360 and 414 nm. The OSL spectra of these samples have been compared with their thermally stimulated luminescence (TSL) spectra and the results are discussed in terms of the formation of F and Vk-centers. The disappearance of certain bands has been attributed to the energy transfer processes between the activator and host.

Paper Details

Date Published: 19 November 1993
PDF: 10 pages
Proc. SPIE 1985, Physical Concepts and Materials for Novel Optoelectronic Device Applications II, (19 November 1993); doi: 10.1117/12.162818
Show Author Affiliations
Karnati Somaiah, Osmania Univ. (India)
M. Venkata Narayana, Osmania Univ. (India)

Published in SPIE Proceedings Vol. 1985:
Physical Concepts and Materials for Novel Optoelectronic Device Applications II
Fabio Beltram; Erich Gornik, Editor(s)

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