Optical properties of Cr3+:NaAl(WO4)2 crystals, a new candidate for broadband laser applications

Nikolov, I.

doi:10.1016/s0925-3467(03)00216-7

Cited by 56 publications

(16 citation statements)

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“…This intense luminescence presents several applications depending on the lattice. For example, NaAl(WO 4 ) 2 :Cr 3+ has been used as a broadband laser source [27], LiInSi 2 O 6 :Cr 3+ in LED-based devices [28], ZnGa 2 O 4 :Cr 3+ and LaAlO 3 :Cr 3+ in in vivo imaging [29,30], LaAlO 3 :Cr 3+ , Ca 2+ in energy-saving applications [31] and NaGd 0.78 F 4 :Yb 0.2 /Er 0.02 /Cr 3+…”

Section: Introductionmentioning

confidence: 99%

Broadband photoluminescence in a ceramic (Mg2SnO4–SnO2):Cr3+ system

et al. 2021

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This study reports the synthesis and photoluminescence spectroscopic studies of Cr3+-doped Mg2SnO4–SnO2 ceramics. The crystal structure was analyzed by X-ray powder diffraction, and photoluminescence was investigated at room temperature. The diffractogram confirmed the presence of Mg2SnO4 and SnO2 phases. Photoluminescence spectroscopy identified broad and intense emission bands assigned to the Cr3+ cation occupation in octahedral Mg2SnO4 sites and an orange band assigned to SnO2 emission. All spectra were analyzed and interpreted according to crystal field theory and Tanabe–Sugano theory for the d3 electronic configuration. The broad and intense emission band covering the visible/near-infrared region suggests that this system may be a promising material for use as an active medium in a broadband light source at room temperature.

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Section: Introductionmentioning

confidence: 99%

Broadband photoluminescence in a ceramic (Mg2SnO4–SnO2):Cr3+ system

et al. 2021

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“…Double molybdates, with their general formula of M I M III (M VI O 4 ) 2 (M I = alkali metal, M III = Al, In, Sc, Fe, Bi, lanthanide; M VI = Mo, W), have been studied extensively due to their unique optical and antiferroelectric properties and ferroelastic phase transitions [4,5,6]. Some of its members behave as promising laser host materials for transition metal and lanthanide ions due to their high and continuous transparency in the wide range of the near-IR region.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Studies of Structure Transformation and Al Coordination of KAl(MoO4)2 during Heating by High Temperature Raman and 27Al NMR Spectroscopies

et al. 2017

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Recent interest in optimizing composition and synthesis conditions of functional crystals, and the further exploration of new possible candidates for tunable solid-state lasers, has led to significant research on compounds in this family MIMIII(MVIO4)2 (MI = alkali metal, MIII = Al, In, Sc, Fe, Bi, lanthanide; MVI = Mo, W). The vibrational modes, structure transformation, and Al coordination of crystalline, glassy, and molten states of KAl(MoO4)2 have been investigated by in-situ high temperature Raman scattering and 27Al magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy, together with first principles density functional simulation of room temperature Raman spectrum. The results showed that, under the present fast quenching conditions, Al is present predominantly in [AlO6] octahedra in both KAl(MoO4)2 glass and melt, with the tetrahedrally coordinated Al being minor at approximately 2.7%. The effect of K+, from ordered arrangement in the crystal to random distribution in the melt, on the local chemical environment of Al, was also revealed. The distribution and quantitative analysis of different Al coordination subspecies are final discussed and found to be dependent on the thermal history of the glass samples.

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“…NaAl(WO 4 ) 2 has six-coordinated Al sites. This unusual coordination may be responsible for the specific properties that are obtained when Al is partially substituted by Cr 3+ (Nikolov, 2004). It has been shown that Cr 3+ :NaAl(WO 4 ) 2 possesses a high absorption cross section in a region suitable for efficient pumping with laser diodes.…”

Section: Structure-related Properties Of K 5 Al(w 3 O 11 ) 2 and Naalmentioning

confidence: 99%

“…At room temperature, this material is characterized by a strong crystal field, a broad band of luminescence between 700 and 1000 nm and a lifetime of $ 50 ms. It is possible to grow single crystals following a convenient technological protocol that guarantees low growth temperature, high growth rate and high distribution coefficient value (Nikolov, 2004). These properties make Cr 3+ :NaAl(WO 4 ) 2 a promising material for laser applications.…”

Section: Structure-related Properties Of K 5 Al(w 3 O 11 ) 2 and Naalmentioning

confidence: 99%

“…This interest stimulated the study of single-crystal materials with a broad band emission in the near-IR region. The study involved several tungstates (Nikolov et al, 2003a,b,c;Nikolov, Nikolov, Kovacheva & Peshev, 2003;Nikolov, 2004;Hermanowicz, 2006;Ivanova et al, 2007;Cavalli et al, 2008;Tzvetkov et al, 2009;Koseva et al, 2011), molybdates Wang et al, 2007Wang et al, , 2008, germanates (Bykov et al, 2005), gallate spinels (Kim et al, 2004), silicates (Avanesov et al, 1997;Chen & Boulon, 2003; Padlyak et al, ISSN 2052-5206 # 2015 International Union of Crystallography 2003; Głuchowski et al, 2009), aluminates (Gurov et al, 2008), borates (De Backer et al, 2003;Brik et al, 2007), fluorides (Torchia et al, 2002;Tanner, 2004;da Silva et al, 2006) and oxides (Kü ck et al, 2000;Patra et al, 2005). Moreover, it has been proven that Cr 3+ -doped NaAl(WO 4 ) 2 (Nikolov, 2004) and KAl(MoO 4 ) 2 (Wang et al, 2008) crystals are suitable laser hosts having high absorption, efficient pumping and broad laser emission.…”

Section: Introductionmentioning

confidence: 99%

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Structural insights intoM₂O–Al₂O₃–WO₃(M= Na, K) system by electron diffraction tomography

Andrusenko

Krysiak

Mugnaioli

et al. 2015

Acta Crystallogr Sect B

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The M2O-Al2O3-WO3 (M = alkaline metals) system has attracted the attention of the scientific community because some of its members showed potential applications as single crystalline media for tunable solid-state lasers. These materials behave as promising laser host materials due to their high and continuous transparency in the wide range of the near-IR region. A systematic investigation of these phases is nonetheless hampered because it is impossible to produce large crystals and only in a few cases a pure synthetic product can be achieved. Despite substantial advances in X-ray powder diffraction methods, structure investigation on nanoscale is still challenging, especially when the sample is polycrystalline and the structures are affected by pseudo-symmetry. Electron diffraction has the advantage of collecting data from single nanoscopic crystals, but it is frequently limited by incompleteness and dynamical effects. Automated diffraction tomography (ADT) recently emerged as an alternative approach able to collect more complete three-dimensional electron diffraction data and at the same time to significantly reduce dynamical scattering. ADT data have been shown to be suitable for ab initio structure solution of phases with large cell parameters, and for detecting pseudo-symmetry that was undetected in X-ray powder data. In this work we present the structure investigation of two hitherto undetermined compounds, K5Al(W3O11)2 and NaAl(WO4)2, by a combination of electron diffraction tomography and precession electron diffraction. We also stress how electron diffraction tomography can be used to obtain direct information about symmetry and pseudo-symmetry for nanocrystalline phases, even when available only in polyphasic mixtures.

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Optical properties of Cr3+:NaAl(WO4)2 crystals, a new candidate for broadband laser applications

Cited by 56 publications

References 15 publications

Broadband photoluminescence in a ceramic (Mg2SnO4–SnO2):Cr3+ system

Broadband photoluminescence in a ceramic (Mg2SnO4–SnO2):Cr3+ system

In-Situ Studies of Structure Transformation and Al Coordination of KAl(MoO4)2 during Heating by High Temperature Raman and 27Al NMR Spectroscopies

Structural insights intoM₂O–Al₂O₃–WO₃(M= Na, K) system by electron diffraction tomography

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Optical properties of Cr3+:NaAl(WO4)2 crystals, a new candidate for broadband laser applications

Cited by 56 publications

References 15 publications

Broadband photoluminescence in a ceramic (Mg2SnO4–SnO2):Cr3+ system

Broadband photoluminescence in a ceramic (Mg2SnO4–SnO2):Cr3+ system

In-Situ Studies of Structure Transformation and Al Coordination of KAl(MoO4)2 during Heating by High Temperature Raman and 27Al NMR Spectroscopies

Structural insights intoM2O–Al2O3–WO3(M= Na, K) system by electron diffraction tomography

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Structural insights intoM₂O–Al₂O₃–WO₃(M= Na, K) system by electron diffraction tomography