Brillouin Scattering and Elastic Constants of Tetragonal Pentaerythritol

The elastic constants and related properties of beta-HMX determined by Brillouin scattering.

By scattering from a variety of acoustic phonons, a complete stiffness tensor has been determined for crystalline beta-HMX. The results are compared with recent experimental and theoretical determinations of the elastic constants and bulk modulus. Reasons for disagreement are discussed in terms of experimental limitations and anharmonic effects. The observed ordering of stiffness constants, C(1...

Elastic constants and dimensions of imprinted polymeric nanolines determined from Brillouin light scattering.

Elastic constants and cross-sectional dimensions of imprinted nanolines of poly(methyl methacrylate) (PMMA) on silicon substrates are determined nondestructively from finite-element inversion analysis of dispersion curves of hypersonic acoustic modes of these nanolines measured with Brillouin light scattering. The results for the cross-sectional dimensions, under the simplifying assumption of v...

Brillouin-scattering study of the elastic constants of phenothiazine through the phase transition.

Comment on "Brillouin-scattering study of the elastic constants of phenothiazine through the phase transition"

Elastic constants of tetrahedral amorphous carbon films by surface Brillouin scattering

The elastic constants of tetrahedral amorphous carbon ~ta-C! and hydrogenated tetrahedral amorphous carbon ~ta-C:H! thin films were determined nondestructively by surface Brillouin scattering. Besides the usual Rayleigh surface mode, we also observe a new pseudosurface acoustic mode of longitudinal polarization, which is a modified version of the longitudinal guided mode usually found in slow-o...