Vincent Rodriguez, Michel Couzi, Frédéric Adamietz, Marc Dussauze, Guillaume Guery, Thierry Cardinal, Philippe Veber, Kathleen Richardson and Philippe Thomas Hyper-Raman and Raman scattering in paratellurite TeO2 Journal of Raman Spectroscopy 44
We present for the first time a hyper-Raman scattering study of paratellurite. We have also revisited the Raman spectra of paratellurite. Anomalous polarization-selection-rules violations previously observed in Raman and due to optical activity are possible to avoid when light propagates at 45° of the Ox and Oy optical axes. From this single crystal study, all expected optical phonon modes frequencies and symmetries are given, except one E (LO) mode that could not be observed. We have evidenced a strong harmonic light scattering signal in the ZY′Y′ spectrum that we tentatively assigned to hyper-Raleigh optical activity that comes from a mixed dipolar electric–magnetic effect.
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