The spectrum of vibration modes in soft opals |
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| Authors: | Cheng W Wang J J Jonas U Steffen W Fytas G Penciu R S Economou E N |
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| Affiliation: | Max Planck Institute for Polymer Research, P.O. Box 3148, 55128 Mainz, Germany. |
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| Abstract: | Numerous vibrational modes of spherical submicrometer particles in fabricated soft opals are experimentally detected by Brillouin light scattering and theoretically identified by their spherical harmonics by means of single-phonon scattering-cross-section calculations. The particle size polydispersity is reflected in the line shape of the low-frequency modes, whereas lattice vibrations are probably responsible for the observed overdamped transverse mode. |
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