Inhomogeneous Broadening: Symmetry of Centers and Disorder in Solid Solutions and Nanocrystals

S.P. Feofilov; A.A. Kaplyanskii; A.B. Kulinkin; R.I. Zakharchenya; K. Ovanesyan; A. Petrosyan; C. Dujardin

doi:10.1051/epjconf/201510301003

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Proceedings

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EPJ Web of Conferences 103, 01003 (2015)
https://doi.org/10.1051/epjconf/201510301003

Inhomogeneous Broadening: Symmetry of Centers and Disorder in Solid Solutions and Nanocrystals

S.P. Feofilov¹^a, A.A. Kaplyanskii¹, A.B. Kulinkin¹, R.I. Zakharchenya¹, K. Ovanesyan², A. Petrosyan² and C. Dujardin³

¹ Ioffe Institute St. Petersburg, 194021, Russia
² Institute for Physical Research, NAS of Armenia Ashtarak-2, 0203, Armenia
³ Institut Lumière Matière, Université Claude Bernard Lyon 1-CNRS UMR 5306, F-69622 Villeurbanne Cedex, France

^a Corresponding author: sergey.feofilov@mail.ioffe.ru

Published online: 25 September 2015

Abstract

Zero-phonon electronic transitions of Cr³⁺ impurity ions in solid solutions and nanocrystals are studied. In the series of Lu_3xY_3-3xAl₅O₁₂ (0<x<1) garnet solid solution crystals the modification of zero-phonon R-line (²E–⁴A₂) fluorescence spectra of Cr³⁺ ions with changing x occurs in a discrete fashion and is not accompanied by strong inhomogeneous broadening. The effect is ascribed to high C_3i symmetry of Cr³⁺(Al³⁺) sites. The fluorescence line narrowing experiments were performed for the inhomogeneously-broadened R-line of cubic Cr³⁺ centers in MgO nanocrystals. The inhomogeneous broadening in nanocrystals is attributed to spatial confinement.

Key words: fluorescence / impurity ions / inhomogeneous broadening / solid solutions / nanocrystals

© Owned by the authors, published by EDP Sciences, 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.