Please use this identifier to cite or link to this item:
Title: Acoustic dynamics of nanoparticles and nanostructured phononic crystals
Keywords: Brillouin spectroscopy, confined eigenvibrations, phononic crystals, magphonic crystals, bandgaps, finite element simulations
Issue Date: 25-Jan-2013
Citation: PAN HUIHUI (2013-01-25). Acoustic dynamics of nanoparticles and nanostructured phononic crystals. ScholarBank@NUS Repository.
Abstract: Brillouin light scattering, a powerful technique for probing hypersonic phonons in nanostructured materials, has been employed to investigate confined acoustic phonons in single-crystal gold nano-octahedra and the surface phonon dispersions in one- and two-dimensional hypersonic phononic crystals. Theoretical investigations, based on the finite element analysis, of the acoustic vibrational modes of gold nano-octahedra and the phonon dispersions of the phononic crystals have also been undertaken. Findings of the gold-octahedra investigation suggests that the eigenfrequencies of any free regular-shaped homogeneous object always scale with its inverse linear dimension, a universal relationship which is valid for such objects of any size in the classical regime. Bragg gap openings and hybridization gaps arising from the avoided crossings of the zone-folded Rayleigh wave and Sezawa wave (or pseudo-Sezawa wave) have been observed for the phononic crystals studied. Our study of a two-dimensional chessboard-patterned phononic crystal reveals hitherto unreported unusual surface optical-like phonon modes.
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
PanHH.pdf4.13 MBAdobe PDF



Page view(s)

checked on Nov 24, 2018


checked on Nov 24, 2018

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.