Lattice dynamics of paratellurite TeO2

Ayrault, Bernard; Decamps, E. A.; Abba, F.; Marqueton, Y.; Durand, Marie-Anne

doi:10.1016/0038-1098(72)90478-4

Cited by 24 publications

(9 citation statements)

References 11 publications

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“…So far, several results were reported on the polarized Raman spectra of α-TeO 2 in the terahertz frequency region [32][33][34][35]. However, the mode assignment was controversial.…”

Section: B Polarized Raman Spectramentioning

confidence: 99%

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

et al. 2014

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We report on the observation of terahertz radiation in a non-centrosymmetric insulating oxide, paratellurite (α-TeO2) by irradiation of a femtosecond laser pulse at room temperature. In the power spectrum of the terahertz radiation, an intensity fringe pattern with a period of ∼ 0.25 THz shows up below 3 THz. It can be reproduced by taking into account the effective generation length for the terahertz radiation with a poor phase-matching condition. In addition, a temporal oscillation component appears in the radiated terahertz wave with a frequency of ∼ 3.71 THz, which is in good agreement with the center frequency of the Raman active longitudinal optical (LO) E mode. On the basis of comprehensive polarized optical and Raman spectroscopic studies, we explain the generation mechanism of the temporal oscillation component in terms of the coherent phonon generation via impulsive stimulated Raman scattering.

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“…So far, several results were reported on the polarized Raman spectra of α-TeO 2 in the terahertz frequency region [32][33][34][35]. However, the mode assignment was controversial.…”

Section: B Polarized Raman Spectramentioning

confidence: 99%

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

et al. 2014

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“…11a) and contributes also to the 650 cm − 1 band. Both bands are IR-active in α-TeO 2 [42]. However, only the 650 cm − 1 band is Raman-active (Fig.…”

Section: The Vibrational Spectra Of the Simulated Glassesmentioning

confidence: 89%

Calculation and analysis of vibrational spectra of PbCl2–Sb2O3–TeO2 glass from first principles

Macháček¹,

Костка²,

Liška³

et al. 2011

Journal of Non-Crystalline Solids

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“…At the center of the Brillouin zone 36 phonon modes of α-TeO 2 are classified according to the following irreducible representations [5]:…”

Section: Phonon Frequencies At the Center Of The Brillouin Zonementioning

confidence: 99%

“…The lattice dynamics of α-TeO 2 was studied using the IR reflection spectra [5][6][7][8], Raman scattering [5,[8][9][10][11][12], and hyper-Raman scattering [12]. As a result of these studies, the vibrations of TO modes at the center of the Brillouin zone have been identified without an analysis of the TO-LO splitting of dipole vibrations.…”

Section: Introductionmentioning

confidence: 99%

Lattice dynamics of α-TeO2 in the DFT-LCAO-B3LYP approximation

Иванова

2015

Opt. Spectrosc.

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Ab initio DFT analysis of phonon frequencies at the center of the Brillouin zone, dispersion of phonons, phonon state density, effective Born charges, and IR reflection and Raman spectra of α-TeO 2 is performed in the basis set of Gaussian functions using the hybrid B3LYP pseudopotential. Inverted phonons were discovered in the TO-LO splitting of polar modes. The possibility of assigning the frequencies to vibrations of the TeO 2 molecule is discussed. The anisotropy of effective Born charges is explained to be a result of the ion-covalent character of the Te-O bond.

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Lattice dynamics of paratellurite TeO2

Cited by 24 publications

References 11 publications

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

Terahertz radiation induced by coherent phonon generation via impulsive stimulated Raman scattering in paratellurite

Calculation and analysis of vibrational spectra of PbCl2–Sb2O3–TeO2 glass from first principles

Lattice dynamics of α-TeO2 in the DFT-LCAO-B3LYP approximation

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