Growth and characterization of PbB4O7 single crystals

Bartwal, K.S.; Bhatt, R.; Kar, S.; Wadhawan, V. K.

doi:10.1016/s0921-5107(01)00659-6

Cited by 28 publications

(22 citation statements)

References 5 publications

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“…In com- parison with experiments, the band gap is generally underestimated in DFT calculations. The experimental fundamental absorption energy (5.4 eV [25,26]) is about 0.62 eV higher than the smallest direct band gap (4.78 eV). It should be pointed out that the discrepancies between calculated and experimental energy gaps may be caused by intrinsic defects which are usually present in the borate crystals [27].…”

Section: Introductionmentioning

confidence: 72%

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Simulation of electronic density of states and optical properties of PbB₄O₇ by first‐principles DFT method

Wang

Cao

et al. 2009

Physica Status Solidi (b)

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First‐principles calculations based on the density functional theory and the generalized gradient approximation were carried out to systematically investigate the electronic structure and linear optical properties of lead tetraborate (PbB4O7; PTB) single crystals. An indirect band gap of 4.34 eV is obtained. The valence band top is at the X‐point and the conduction band is at the Γ‐point. The calculated total and partial densities of states indicate that the top valence band is constructed from O 2p states and the low conduction band mainly consists of Pb 6p states. The optical absorption spectra show several prominent structures but with very small directional anisotropy. PTB crystals have a higher refractive index but a small birefringence. The calculated frequency‐dependent refractive index is in good agreement with experimental data. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: Introductionmentioning

confidence: 72%

“…The linear and nonlinear optical properties of PTB have been investigated. The measured fundamental absorption energy (E a ) is 4.14 eV [13] and 5.4 eV [25,26]. The small amounts of impurities and defects in the sample maybe responsible for discrepancies between measured E a .…”

Section: Introductionmentioning

confidence: 99%

Simulation of electronic density of states and optical properties of PbB₄O₇ by first‐principles DFT method

Wang

Cao

et al. 2009

Physica Status Solidi (b)

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“…The crystal structure consists of exclusively four-fold (tetrahedrally) coordinated boron atoms and lead atoms with an irregular oxygen coordination of which the coordination number is not clearly defined. Setting a cut- (2) 0.2200(1) 0.6799 (2) 1(C1) Density, g cm −3 [11,12] dx ≈ 5.88 Melting temperature, K [13] T m ≈ 1047 Method of crystal growth top-seeding technique [14,15], modified Czochralski [15-17] Linear optical character biaxial negative (n…”

Section: Crystallographymentioning

confidence: 99%

High-order stimulated Raman scattering and cascaded nonlinear lasing effects in crystals of (χ⁽³⁾→ χ⁽²⁾)-active orthorhombic PbB₄O₇

et al. 2007

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High-order stimulated Raman scattering (SRS) and cascaded χ (3) → χ (2) generation effects in new nonlinearlaser crystals of PbB 4 O 7 were observed with picosecond laser pumping. All registered χ (3) -and χ (2) -lasing components in the visible and near-IR were identified and attributed to the SRSpromoting mode ωSRS ≈ 148 cm −1 of the studied crystal.Example of a grown crystal of PbB4O7, together with two crystal samples that were cut from the bulk of the crystal

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“…1 They are chemically and mechanically very stable, with good transparency down to the deep UV region. 2,3 Recently, lead tetraborate (PbB 4 O 7 ) has been discovered as a prospective Raman laser, 4 in spite of its poor second harmonic response (SHG), very small birefringence and absence of angle phase matching.…”

Section: Introductionmentioning

confidence: 99%

“…2,3 Recently, lead tetraborate (PbB 4 O 7 ) has been discovered as a prospective Raman laser, 4 in spite of its poor second harmonic response (SHG), very small birefringence and absence of angle phase matching. 1,5 The structure of PbB 4 O 7 has been reported. Perloff and Block 6 described this structure in the orthorhombic space group P2 1 9 -15 The obtained Raman and IR data were used to confirm the symmetry and to propose assignment of the observed modes to the respective motions of atoms.…”

Section: Introductionmentioning

confidence: 99%

Polarized Raman and IR spectra of non‐centrosymmetric PbB₄O₇ single crystal

Hanuza

Mączka

Lorenc

et al. 2008

J Raman Spectroscopy

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Polarized Raman and IR spectra of a PbB 4 O 7 single crystal were measured. The obtained spectra are discussed within the factor group approach for the orthorhombic P2 1 nm .C 2v 7 / space group with Z = 2 assuming that the crystal structure is built up of the (B 4 O 7 ) ∞ 2− framework and Pb 2+ ions. It has been shown that vibrations of borate and Pb 2+ units are observed above 240 and below 160 cm −1 , respectively. The results obtained for the spontaneous Raman scattering have also been used in the discussion of the stimulated Raman spectra of the material studied -a new Raman-laser crystal. The obtained results revealed that mainly translational motions of Pb 2+ ions participate efficiently in the SRS effect.

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Growth and characterization of PbB4O7 single crystals

Cited by 28 publications

References 5 publications

Simulation of electronic density of states and optical properties of PbB₄O₇ by first‐principles DFT method

Simulation of electronic density of states and optical properties of PbB₄O₇ by first‐principles DFT method

High-order stimulated Raman scattering and cascaded nonlinear lasing effects in crystals of (χ⁽³⁾→ χ⁽²⁾)-active orthorhombic PbB₄O₇

Polarized Raman and IR spectra of non‐centrosymmetric PbB₄O₇ single crystal

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Growth and characterization of PbB4O7 single crystals

Cited by 28 publications

References 5 publications

Simulation of electronic density of states and optical properties of PbB4O7 by first‐principles DFT method

Simulation of electronic density of states and optical properties of PbB4O7 by first‐principles DFT method

High-order stimulated Raman scattering and cascaded nonlinear lasing effects in crystals of (χ(3)→ χ(2))-active orthorhombic PbB4O7

Polarized Raman and IR spectra of non‐centrosymmetric PbB4O7 single crystal

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Simulation of electronic density of states and optical properties of PbB₄O₇ by first‐principles DFT method

Simulation of electronic density of states and optical properties of PbB₄O₇ by first‐principles DFT method

High-order stimulated Raman scattering and cascaded nonlinear lasing effects in crystals of (χ⁽³⁾→ χ⁽²⁾)-active orthorhombic PbB₄O₇

Polarized Raman and IR spectra of non‐centrosymmetric PbB₄O₇ single crystal