Frequency-modulated stimulated Brillouin spectroscopy in high-refractive-index glasses

Abstract Frequency-modulated stimulated Brillouin spectroscopy has been performed for high-refractive-index glasses including heavy-metal oxide glasses, chalcogenide glasses and TeO 2 -based and Bi 2 O 3 -based glasses. Although the Brillouin linewidth in glassy materials is broader in general than that in crystalline materials, we have found that the Brillouin linewidth of Ge 33 As 12 Se 55 chalcogenide glass is considerably narrow and is comparable to that in crystals.