VUV Laser Spectroscopy of Trivalent Rare-Earth Ions in Wide Band Gap Fluoride Crystals

Sarantopoulou, E.; Cefalas, Alciviadis-Constantinos

doi:10.1201/9780203908327.ch8

Cited by 6 publications

(1 citation statement)

References 108 publications

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“…Fluorides are being investigated as leading host materials for solid-state lasers in the ultraviolet (UV) region because of their large band gaps and low phonon energies resulting in high fluorescence efficiencies. 1,2) In addition, fluorides are robust against radiation damage and have small non-linear refractive indices. 3,4) In particular, it has been reported that lithium calcium hexafluoroaluminate (LiCaAlF 6 , LiCAF) and lithium strontium hexafluoroaluminate (LiSrAlF 6 , LiSAF) are excellent host materials for tunable all-solid-state lasers in the UV region when doped with trivalent cerium.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the electronic band structures of LiCaAlF₆and LiSrAlF₆ultraviolet laser host media from ab initio calculations

Luong

Cadatal-Raduban

Empizo

et al. 2015

Jpn. J. Appl. Phys.

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We report the electronic structures and density of states (DOS) of perfect LiCAF and LiSAF crystals calculated from density functional theory (DFT) with local density approximation (LDA) using optimized lattice constants. DOS calculations reveal that the valence band is mainly derived from F 2p, thereby resulting to a very narrow valence band manifold. Meanwhile, the conduction band is mainly derived from Ca 4s or Sr 5s resulting to Sr having a broader band dispersion compared to Ca. Both fluoride compounds have indirect band gaps with LiCAF having a band gap of 8.02 eV and LiSAF a band gap of 7.92 eV. This is, to the best of our knowledge, the first report on the electronic structure of LiSAF calculated using DFT with LDA. Our results suggest that when doped with Ce3+, the shorter 5d-conduction band distance in Ce:LiSAF combined with the difficulty of growing high-purity crystals lead to the more pronounced excited state absorption (ESA) and solarization effect experimentally observed in Ce:LiSAF, limiting its potential as a laser material compared with Ce:LiCAF.

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Section: Introductionmentioning

confidence: 99%

Comparison of the electronic band structures of LiCaAlF₆and LiSrAlF₆ultraviolet laser host media from ab initio calculations

Luong

Cadatal-Raduban

Empizo

et al. 2015

Jpn. J. Appl. Phys.

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Observation of cluster formation of rare earth ions in wide band gap fluorine dielectric crystals using transmission electron microscopy

Dražić¹,

Kobe²,

Sarantopoulou³

et al. 2004

Applied Surface Science

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Vacuum ultraviolet emission bands of LiLuF4:Tb3+ crystals in the spectral range from 157 to 200 nm

Sarantopoulou

Kollia

Cefalas

2002

Microelectronic Engineering

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VUV Laser Spectroscopy of Trivalent Rare-Earth Ions in Wide Band Gap Fluoride Crystals

Cited by 6 publications

References 108 publications

Comparison of the electronic band structures of LiCaAlF₆and LiSrAlF₆ultraviolet laser host media from ab initio calculations

Comparison of the electronic band structures of LiCaAlF₆and LiSrAlF₆ultraviolet laser host media from ab initio calculations

Observation of cluster formation of rare earth ions in wide band gap fluorine dielectric crystals using transmission electron microscopy

Vacuum ultraviolet emission bands of LiLuF4:Tb3+ crystals in the spectral range from 157 to 200 nm

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VUV Laser Spectroscopy of Trivalent Rare-Earth Ions in Wide Band Gap Fluoride Crystals

Cited by 6 publications

References 108 publications

Comparison of the electronic band structures of LiCaAlF6and LiSrAlF6ultraviolet laser host media from ab initio calculations

Comparison of the electronic band structures of LiCaAlF6and LiSrAlF6ultraviolet laser host media from ab initio calculations

Observation of cluster formation of rare earth ions in wide band gap fluorine dielectric crystals using transmission electron microscopy

Vacuum ultraviolet emission bands of LiLuF4:Tb3+ crystals in the spectral range from 157 to 200 nm

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Comparison of the electronic band structures of LiCaAlF₆and LiSrAlF₆ultraviolet laser host media from ab initio calculations

Comparison of the electronic band structures of LiCaAlF₆and LiSrAlF₆ultraviolet laser host media from ab initio calculations