Recent advances in rare earth-based borate single crystals: Potential materials for nonlinear optical and laser applications

Kumar, R. Arun; Arivanandhan, M.; Hayakawa, Y.

doi:10.1016/j.pcrysgrow.2013.07.001

Cited by 65 publications

(11 citation statements)

References 69 publications

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“…NLO materials having high first hyperpolarizability are used in SHG for doubling of the frequency. , Thus, these NLO materials (those that have high first hyperpolarizability) must have sufficient transparency in the laser beam UV region. For this purpose, UV–vis absorption analysis of the pure C 6 O 6 Li 6 surface and doped organometallics was performed.…”

Section: Resultsmentioning

confidence: 99%

Demonstrating the Potential of Alkali Metal-Doped Cyclic C₆O₆Li₆ Organometallics as Electrides and High-Performance NLO Materials

et al. 2021

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In this report, the geometric and electronic properties and static and dynamic hyperpolarizabilities of alkali metal-doped C6O6Li6 organometallics are analyzed via density functional theory methods. The thermal stability of the considered complexes is examined through interaction energy (E int) calculations. Doping of alkali metal derives diffuse excess electrons, which generate the electride characteristics in the respective systems (electrons@complexant, e–@M@C6O6Li6, M = Li, Na, and K). The electronic density shifting is also supported by natural bond orbital charge analysis. These electrides are further investigated for their nonlinear optical (NLO) responses through static and dynamic hyperpolarizability analyses. The potassium-doped C6O6Li6 (K@C6O6Li6) complex has high values of second- (βtot = 2.9 × 105 au) and third-order NLO responses (γtot = 1.6 × 108 au) along with a high refractive index at 1064 nm, indicating that the NLO response of the corresponding complex increases at a higher wavelength. UV–vis absorption analysis is used to confirm the electronic excitations, which occur from the metal toward C6O6Li6. We assume that these newly designed organometallic electrides can be used in optical and optoelectronic fields for achieving better second-harmonic-generation-based NLO materials.

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Section: Resultsmentioning

confidence: 99%

Demonstrating the Potential of Alkali Metal-Doped Cyclic C₆O₆Li₆ Organometallics as Electrides and High-Performance NLO Materials

et al. 2021

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“…To further explore new UV NLO materials, much attention has been paid to the rare-earth borate system. − Because the rare-earth ions with closed-shell electron configurations, i.e., Sc 3+ , Y 3+ , La 3+ , and Lu 3+ , have no f–f or d–d electronic transitions, the corresponding rare-earth borates are expected to possess high optical transmission in the UV region. As an example, the derivatives of huntite Lu 0.66 La 0.95 Sc 2.39 (BO 3 ) 4 and Y 0.57 La 0.72 Sc 2.71 (BO 3 ) 4 were both reported to exhibit a short λ cutoff value of approximately 190 nm and possess the large second-harmonic-generation (SHG) coefficients d 11 of 1.74 and 1.70 pm/V, respectively. − Besides the mixed rare-earth metal borates, the ternary alkali- or alkaline-earth-metal rare-earth borates, i.e., A 2 O/AeO–RE 2 O 3 –B 2 O 3 (A = alkali metal, Ae = alkaline-earth metal, and RE = rare earth), have also been well studied, which produces a series of new structure types and a few promising UV NLO crystals.…”

Section: Introductionmentioning

confidence: 99%

K₆ACaSc₂(B₅O₁₀)₃ (A = Li, Na, Li_0.7Na_0.3): Nonlinear-Optical Materials with Short UV Cutoff Edges

Feng

et al. 2019

Inorg. Chem.

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Three new acentric Sc-based borates, K 6 ACaSc 2 (B 5 O 10 ) 3 (A = Li, Na, Li 0.7 Na 0.3 ; space group R32), have been obtained and characterized. They are isostructural, and all exhibit three-dimensional [Sc 2 (B 5 O 10 ) 3 ] 9− anionic architecture composed of B 5 O 10 clusters and ScO 6 octahedra with the alkali-and alkaline-earth-metal cations occupying the cavities and keeping the charge balance. These compounds possess moderate second-harmonic-generation (SHG) responses (∼0.2×β-BaB 2 O 4 at 532 nm and ∼0.4×KH 2 PO 4 at 1064 nm) with phase-matching abilities and importantly display short cutoff edges below 200 nm. Furthermore, the relationship between the crystal structure and the SHG property has also been discussed based on the theoretical calculations.

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“…Further, the luminescence of BaMgAl 10 O 17 :Eu 2+ shows irreversible deterioration at higher temperatures due to oxidation. , A blue emitting phosphate-based RbBaPO :Eu 2+ shows better properties and thermal stability when excited in the near-UV region, but the need for efficient and stable blue phosphors is still ongoing . Recently, blue-emitting phosphors have been discovered by searching the ternary BaO–Y 2 O 3 –B 2 O 3 phase space, and these rare-earth substituted borates have drawn increased attention as UV excited phosphors due to their transparency in the UV region, high damage threshold, and high thermal stability. − …”

Section: Introductionmentioning

confidence: 99%

Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba₂(Y_1–xLu_x)₅B₅O₁₇:Ce³⁺ (x = 0–1)

et al. 2017

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The preparation of cerium-substituted barium lutetium borate, Ba2Lu5B5O17:Ce3+, is achieved using high temperature solid state synthesis. This compound crystallizes in the Ba2Y5B5O17-type structure and shows an efficient blue emission (λmax = 447 nm) when excited by UV-light (λex = 340 nm) with a photoluminescent quantum yield near 90%, a fast luminescence decay time (<40 ns), and a thermal quenching temperature of 452 K. Further, preparing a solid solution following Ba2(Y1–x Lu x )5B5O17:Ce3+ (x = 0, 0.25, 0.50, 0.75, 1) confirms that all compounds are isostructural and follow Vegard’s law. Substituting Y3+ for Lu3+ yields a nearly constant emission spectrum that blue-shifts by only 9 nm and has a consistent luminescence lifetime across the range prepared. The photoluminescent quantum yield (PLQY) and thermal quenching (T 50) of the solid solution, however, are dramatically impacted by the composition, with the PLQY decreasing to ≈70% and the T 50 dropping 49 K going from x = 1 to x = 0. These significant changes in the optical properties likely stem from enhanced structural rigidity as the larger, more polarizable Y3+ is substituted for the smaller, harder Lu3+ cation. These results highlight the importance of optimizing chemical bonding to improve a phosphor’s optical properties.

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Recent advances in rare earth-based borate single crystals: Potential materials for nonlinear optical and laser applications

Cited by 65 publications

References 69 publications

Demonstrating the Potential of Alkali Metal-Doped Cyclic C₆O₆Li₆ Organometallics as Electrides and High-Performance NLO Materials

Demonstrating the Potential of Alkali Metal-Doped Cyclic C₆O₆Li₆ Organometallics as Electrides and High-Performance NLO Materials

K₆ACaSc₂(B₅O₁₀)₃ (A = Li, Na, Li_0.7Na_0.3): Nonlinear-Optical Materials with Short UV Cutoff Edges

Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba₂(Y_1–xLu_x)₅B₅O₁₇:Ce³⁺ (x = 0–1)

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Recent advances in rare earth-based borate single crystals: Potential materials for nonlinear optical and laser applications

Cited by 65 publications

References 69 publications

Demonstrating the Potential of Alkali Metal-Doped Cyclic C6O6Li6 Organometallics as Electrides and High-Performance NLO Materials

Demonstrating the Potential of Alkali Metal-Doped Cyclic C6O6Li6 Organometallics as Electrides and High-Performance NLO Materials

K6ACaSc2(B5O10)3 (A = Li, Na, Li0.7Na0.3): Nonlinear-Optical Materials with Short UV Cutoff Edges

Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba2(Y1–xLux)5B5O17:Ce3+ (x = 0–1)

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Demonstrating the Potential of Alkali Metal-Doped Cyclic C₆O₆Li₆ Organometallics as Electrides and High-Performance NLO Materials

Demonstrating the Potential of Alkali Metal-Doped Cyclic C₆O₆Li₆ Organometallics as Electrides and High-Performance NLO Materials

K₆ACaSc₂(B₅O₁₀)₃ (A = Li, Na, Li_0.7Na_0.3): Nonlinear-Optical Materials with Short UV Cutoff Edges

Tunable Optical Properties and Increased Thermal Quenching in the Blue-Emitting Phosphor Series: Ba₂(Y_1–xLu_x)₅B₅O₁₇:Ce³⁺ (x = 0–1)