Photorefractive Lithium Niobate crystals: light polarisation rotation highlighted by transmission Raman spectroscopy
Résumé
Transmission Raman spectroscopy experiments as a function on time were carried out on iron doped photorefractive congruent lithium niobate crystals. A big change with time in Raman spectra is observed when the incident light is polarized along ordinary axis. The mentioned breaking of Raman selection rules is originated by photorefractive properties of the crystal.