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Observation of infrared active and silent modes in cubic crystals by hyper‐Raman scattering
Author(s) -
Vogt H.,
Neumann G.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220920107
Subject(s) - brillouin zone , raman spectroscopy , raman scattering , phonon , materials science , infrared , optics , molecular physics , brillouin scattering , condensed matter physics , chemistry , physics , laser
Hyper‐Raman spectra of CsI, CsBr, RbI, and SrTiO 3 are measured at room temperature. All optical phonons at the I′‐point of the Brillouin zone can be detected including the longitudinal modes and one silent mode. The results obtained for SrTiO 3 are compared with data due to other experimental techniques. Superiority of hyper‐Raman speetroscopy in determining frequencies and linewidths is demonstrated.