Keith A. Nelson

Abstract: Time-domain light scattering experiments on ps-μs timescales permit determination of the complex compressibility modulus in liquids and glasses in the MHz-GHz frequency window. Analysis of mechanical and electrical modulus spectra for a concentrated aqueous LiCl solution yields results consistent with some predictions of mode-coupling theory: simple scaling for α-relaxation peaks and property-independent power-law functional forms for the spectra which are independent of the property described. Preliminary data from salol, recorded with an improved experimental system, are also presented.

TL;DR: In this paper, the temperature and wave vector dependence of the soft shear acoustic mode and the soft polarization mode of KD2PO4 were examined in the high-temperature phase through impulsive stimulated Brillouin and Raman scattering.

TL;DR: In this paper, the first application of Brillouin light scattering to probe elastic excitations in highly anisotropic polymer thin films is presented, where both the in-plane and out-of-plane longitudi...

TL;DR: In this article, the authors present des publications dans lesquels des processus electroniques ou nucleaires sont induits and controles avec des resolutions temporelles inferieures a 100 femtosecondes.

TL;DR: In this paper, a novel THz-pump-THz probe scheme with up to 100 kV/cm pump fields and 100 MW/cm2 intensity was employed to observe impact ionization and saturation of free carrier absorption in indium antimonide at 200K and 80k.