The role of the Mg2+ ions in Cr3+ spectroscopy for near-stoichiometric LiNbO3 crystals

T.P.J. Han, F. Jaque, V. Bermudez, E. Dieguez

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The optical spectroscopy of Cr3+ ions doped into near-stoichiometric LiNbO3 crystals, pure and co-doped with MgO, has been investigated. In the near-stoichiometric LiNbO3:Cr(0.2 mol%):Mg(2 mol%) crystal, the optical spectra resemble those previously observed for congruent LiNbO3:Cr:MgO samples when the total MgO content exceeds the 4.6 mol% threshold. The coexistence of two types of Cr3+ centre ([Cr]Li and [Cr]Nb) characterized the optical and luminescence spectra of this sample. The concentration equilibrium between the two types of centre is strongly displaced towards the [Cr3+]Nb centre, permitting us to obtain with accuracy the parameters of the broad bands. The R-line associated with the [Cr]Nb centre is only observable in the low-temperature emission spectrum. The Fano antiresonance lines present have been observed to be more pronounced for the near-stoichiometric samples than for congruent ones.
LanguageEnglish
Pages281-290
Number of pages10
JournalJournal of Physics: Condensed Matter
Volume15
Issue number2
Early online date20 Dec 2002
DOIs
Publication statusPublished - 22 Jan 2003

Fingerprint

Spectroscopy
Ions
Crystals
spectroscopy
crystals
Luminescence
ions
optical spectrum
Temperature
lithium niobate
emission spectra
luminescence
broadband
thresholds
Optical spectroscopy

Keywords

  • chromium
  • impurity absorption spectra
  • impurity states
  • lithium compounds
  • luminescence
  • magnesium

Cite this

Han, T.P.J. ; Jaque, F. ; Bermudez, V. ; Dieguez, E. / The role of the Mg2+ ions in Cr3+ spectroscopy for near-stoichiometric LiNbO3 crystals. In: Journal of Physics: Condensed Matter . 2003 ; Vol. 15, No. 2. pp. 281-290.
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abstract = "The optical spectroscopy of Cr3+ ions doped into near-stoichiometric LiNbO3 crystals, pure and co-doped with MgO, has been investigated. In the near-stoichiometric LiNbO3:Cr(0.2 mol{\%}):Mg(2 mol{\%}) crystal, the optical spectra resemble those previously observed for congruent LiNbO3:Cr:MgO samples when the total MgO content exceeds the 4.6 mol{\%} threshold. The coexistence of two types of Cr3+ centre ([Cr]Li and [Cr]Nb) characterized the optical and luminescence spectra of this sample. The concentration equilibrium between the two types of centre is strongly displaced towards the [Cr3+]Nb centre, permitting us to obtain with accuracy the parameters of the broad bands. The R-line associated with the [Cr]Nb centre is only observable in the low-temperature emission spectrum. The Fano antiresonance lines present have been observed to be more pronounced for the near-stoichiometric samples than for congruent ones.",
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The role of the Mg2+ ions in Cr3+ spectroscopy for near-stoichiometric LiNbO3 crystals. / Han, T.P.J.; Jaque, F.; Bermudez, V.; Dieguez, E.

In: Journal of Physics: Condensed Matter , Vol. 15, No. 2, 22.01.2003, p. 281-290.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The role of the Mg2+ ions in Cr3+ spectroscopy for near-stoichiometric LiNbO3 crystals

AU - Han, T.P.J.

AU - Jaque, F.

AU - Bermudez, V.

AU - Dieguez, E.

PY - 2003/1/22

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N2 - The optical spectroscopy of Cr3+ ions doped into near-stoichiometric LiNbO3 crystals, pure and co-doped with MgO, has been investigated. In the near-stoichiometric LiNbO3:Cr(0.2 mol%):Mg(2 mol%) crystal, the optical spectra resemble those previously observed for congruent LiNbO3:Cr:MgO samples when the total MgO content exceeds the 4.6 mol% threshold. The coexistence of two types of Cr3+ centre ([Cr]Li and [Cr]Nb) characterized the optical and luminescence spectra of this sample. The concentration equilibrium between the two types of centre is strongly displaced towards the [Cr3+]Nb centre, permitting us to obtain with accuracy the parameters of the broad bands. The R-line associated with the [Cr]Nb centre is only observable in the low-temperature emission spectrum. The Fano antiresonance lines present have been observed to be more pronounced for the near-stoichiometric samples than for congruent ones.

AB - The optical spectroscopy of Cr3+ ions doped into near-stoichiometric LiNbO3 crystals, pure and co-doped with MgO, has been investigated. In the near-stoichiometric LiNbO3:Cr(0.2 mol%):Mg(2 mol%) crystal, the optical spectra resemble those previously observed for congruent LiNbO3:Cr:MgO samples when the total MgO content exceeds the 4.6 mol% threshold. The coexistence of two types of Cr3+ centre ([Cr]Li and [Cr]Nb) characterized the optical and luminescence spectra of this sample. The concentration equilibrium between the two types of centre is strongly displaced towards the [Cr3+]Nb centre, permitting us to obtain with accuracy the parameters of the broad bands. The R-line associated with the [Cr]Nb centre is only observable in the low-temperature emission spectrum. The Fano antiresonance lines present have been observed to be more pronounced for the near-stoichiometric samples than for congruent ones.

KW - chromium

KW - impurity absorption spectra

KW - impurity states

KW - lithium compounds

KW - luminescence

KW - magnesium

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