Hyper-Raman scattering by vibrational excitations in crystals, glasses and liquids

Денисов, В. Н.; Mavrin, B. N.; Podobedov, V. B.

doi:10.1016/0370-1573(87)90053-6

Cited by 180 publications

(112 citation statements)

References 100 publications

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“…Since the (n -1) rule results in weight 2 being excluded from any polarized hyper-Raman spectrum, it is not surprising that experimental proof for the TIC*, structure has not been forthcoming [21]. There nonetheless remains no case for assuming the molecular tensor to be fully index symmetric [22].…”

Section: Characterization Of Multiphoton Transitions By Polarization mentioning

confidence: 99%

Symmetry characterization in molecular multiphoton spectroscopy

Andrews¹

1990

Spectrochimica Acta Part A: Molecular Spectroscopy

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Abstract-In this paper it is shown how simple application of irreducible tensor calculus provides a powerful method for the symmetry characterization of a wide range of multiphoton transitions in solids, liquids or gases. These methods provide for a systematic classification of distinct symmetry classes for any multiphoton process and facilitate devising suitable polarization studies for spectroscopic application. General results for multiphoton processes up to and including those involving four-photon interactions are presented in the tables for all the common molecular and crystallographic point groups. A new symmetry class labelling scheme is also introduced. Applications are illustrated by reference to two-, three-and four-photon absorption, resonance and non-resonance Raman scattering and hyper-Raman scattering. Whilst the examples principally involve electric dipole coupling, it is demonstrated how the effects of higher multipoles may be incorporated into the results.

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Section: Characterization Of Multiphoton Transitions By Polarization mentioning

confidence: 99%

Symmetry characterization in molecular multiphoton spectroscopy

Andrews¹

1990

Spectrochimica Acta Part A: Molecular Spectroscopy

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“…In this case the tensor β is obviously symmetric with respect to its last two indices, β ijk = β ikj . Moreover, since both ω i and ω s are far from any material resonance, β ζ can be approximated as fully symmetric in all permutations of its three cartesian indices 8 . The corresponding scattering vector q is given by q = ±(k s −2k i ), where k s and k i are the wave vectors of the scattered and incident radiation, respectively.…”

Section: The Structural Modelmentioning

confidence: 99%

“…HRS is a non-linear optical spectroscopy in which two incident photons of angular frequency ω combine with one excitation of the material at ω v to produce one scattered photon at 2ω ± ω v . 8 The lower sign The inset shows the lowest frequency polar band measured in transmission 19 which is more structured than the TO peak derived from reflection; b) VV and VH hyper-Raman spectra obtained in 90…”

Section: Introductionmentioning

confidence: 99%

“…An example of that is shown below. It turns out that IR active modes can always be directly observed in HRS, with very specific selection rules 8 . As shown in this work, HRS spectroscopy is very helpful for the assignment of the vibrational modes of vitreous boron oxide, v−B 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

“…One interest in combining HRS with RS is that the selection rules of these two spectroscopies are often complementary, modes forbidden in RS being mostly allowed in HRS, and vice versa. Both longitudinal optic (LO) and transverse optic (TO) modes are active in HRS, with selection rules that allow separating them 8 . The results presented below will be compared to IR data from the literature.…”

Section: Introductionmentioning

confidence: 99%

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Hyper-Raman scattering analysis of the vibrations in vitreous boron oxide

et al. 2007

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Hyper-Raman scattering has been measured on vitreous boron oxide, v−B2O3. This spectroscopy, complemented with Raman scattering and infrared absorption, reveals the full set of vibrations that can be observed with light. A mode analysis is performed based on the local D 3h symmetry of BO3 triangles and B3O3 boroxol rings. The results show that in v−B2O3 the main spectral components can be succesfully assigned using this relatively simple model. In particular, it can be shown that the hyper-Raman boson peak arises from external modes that correspond mainly to librational motions of rigid boroxol rings.

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Hyper-Raman Scattering on GaN and CdS

Filippidis¹,

Siegle²,

Hoffmann³

et al. 1999

phys. stat. sol. (b)

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Introduction. In the recent years hyper-Raman (HR) scattering has become an important tool besides Raman scattering to obtain information about structural phase transitions or infrared and Raman-inactive (so-called silent) vibrational modes (for a review see, e.g., Ref. [1]). To the best of our knowledge HR measurements on wurtzite crystals were only performed on CdS [2]. We report on results of HR experiments on GaN and compare them with CdS.

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Hyper-Raman scattering by vibrational excitations in crystals, glasses and liquids

Cited by 180 publications

References 100 publications

Symmetry characterization in molecular multiphoton spectroscopy

Symmetry characterization in molecular multiphoton spectroscopy

Hyper-Raman scattering analysis of the vibrations in vitreous boron oxide

Hyper-Raman Scattering on GaN and CdS

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