Brillouin light scattering

M. Sinha, Ph. D. Physics Probing Polymer Networks Using Pulse Propagation and Brillouin Light Scattering Techniques. University of Cincinnati, 2000. 

Keywords reentrant phase transitions, Brillouin light scattering, sound velocity, sound absorption, critical phenomena. 

Robert , E., Carlotti, G., Cinelli, S., Onori, G., Donnadio, A., Narducci, R., Casciola, M., and Sganappa, M. (2010) Measurement of the Young s modulus of Nafion membranes by Brillouin light scattering. J. Power Sources, 195, 7761-7764. 

The first evidence for hypersonic phononic crystal effects was observed in porous silicon superlattices using Brillouin light-scattering experiments (Parsons and Andrews 2009). Comparison between experiment and theory using the Rytov model indicated that the bulk longitudinal phonon branch had been folded. One of the samples exhibited a spectrum consistent with a bandgap of 3.3 GHz for a first gap located at 13.4 GHz. 

Fig. 13 Tg of PS film as a function of its thickness, (a) Freely standing films with two different molecular weights. The experiments were ctirried out using Brillouin light scattering (BLS) and ellipsometry [35,37]. (b) Films on the native oxide covered silicon surface (eUipsometry measurements) [31]. PS samples with Afw = 1.2 x 10 , 5 x 10 , and 2.9 x 10 were taken...

Fig. 2.17. Measured TgS for free-standing Aims. The solid symbols were obtained with ellipsometry. The hollow symbols were obtained using Brillouin light scattering. From Forrest and Dalnoki-Veress by permission [136],...

W. Brown, K. Schillen, R. Johnson, C. Konak, and L. Dvoranek. Brillouin light scattering from poly(methyl methacrylate)/toluene concentrated solutions. Macromolecules, 25(1992), 802-805. 

Figure 7 The shear modulus as derived from Brillouin light scattering. Young s modulus, and the microhardness obtained by ultra load indentation measurements as a function of the N/Ti ratio in TiNx films. (From Ref. 43.)...

Brillouin light scattering [73-75]. The electrical field of the photons couples to the spin wave via spin-orbit interachon in this case. The possible wave vector transfer paraUel to the surface is, however, limited by the wave vector of the incident hght, which is of the order of 10 A. Thus, in this method, only modes with a very long wavelength compared to the lattice constant are excited. 

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