The spectra of longitudinal and transverse collective excitations in liquid binary metallic Na(c)K(1-c) alloys are studied for pure components and four different concentrations. A theoretical generalized collective modes approach is used to analyze the concentration dependence of the dispersion of acoustic and optic branches in a wide region of wavenumbers. The dispersion of longitudinal collec...

A transient thermoreflectance technique, using a 200-fs laser pulse, is demonstrated as a nondestructive method for measuring the thermal boundary resistance between a thin metallic film and dielectric substrate. Experimental results are presented for Au deposited on silicon and silicon dioxide substrates taken at room temperature and compared to a thermal model. The relevant thermal properties...

A well-dispersed phase of exfoliated graphene oxide (GO) nanosheets was initially prepared in water. This was concentrated by centrifugation and was mixed with a liquid epoxy resin. The remaining water was removed by evaporation, leaving a GO dispersion in epoxy resin. A stoichiometric amount of an anhydride curing agent was added to this epoxy-resin mixture containing the GO nanosheets, which ...

Measuring the curves of dispersion for dielectrics using a low-energy laser and a thermal source of radiation ROBERT LANNING, CRISTIAN BAHRIM, DON DUPLAN, Lamar University, WEI-TAI HSU, National Central University, Taiwan — We propose a simple and accurate method for finding curves of dispersion for solid and liquid dielectrics using polarized light reflected by their surface near the Brewster ...

We use hydrodynamical N -body simulations to study the kinetic Sunyaev–Zel’dovich effect. We construct sets of maps, one square degree in size, in three different cosmological models. We confirm earlier calculations that on the scales studied the kinetic effect is much smaller than the thermal (except close to the thermal null point), with an rms dispersion smaller by about a factor five in the...

A dispersion-shifted fiber (DSF) is designed to have its zero dispersion wavelength in 1.55μm wavelength range. Since the dispersion of DSF is close to zero in the C-band, conditions for dense wavelength division multiplexing (DWDM) transmission using DSF are limited due to four wave mixing (FWM). In the L-band, however, the DSF has some dispersion values, so that the DWDM transmission using DS...

Abstract This paper is devoted to study the thermal aspects of a photon gas within context Planck-scale-modified dispersion relations. We spectrum radiation and correction Stefan–Boltzmann law in different cases when Lorentz symmetry no longer preserved. Explicitly, we examine two models CPT-even CPT-odd sectors respectively. To do so, three distinct scenarios Universe are considered: Cosmic Mi...