title: The spectrum of vibration modes in soft opals.
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.
authors.affiliation: Max Planck Institute for Polymer Research, P.O. Box 3148, 55128 Mainz, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Cheng
authors.forename: J J
authors.initials: JJ
authors.lastname: Wang
authors.forename: U
authors.initials: U
authors.lastname: Jonas
authors.forename: W
authors.initials: W
authors.lastname: Steffen
authors.forename: G
authors.initials: G
authors.lastname: Fytas
authors.forename: R S
authors.initials: RS
authors.lastname: Penciu
authors.forename: E N
authors.initials: EN
authors.lastname: Economou