Usually the main Raman scattering frequency shifts with composition for GeSe chalcogenide glasses.
Here we show the compositional evolution of the main Raman scattering frequency in Ge(SxSe1 − x 2 glasses, and then clarify its structural origin.
We keep the number of topological constraints constant in the studied glass series, in order to explore the impact of mediate range structure on the main Raman scattering frequency.
This explains why the visco-elastic and poroelastic mechanisms are usually treated separately in the context of macroscopic (effective medium) theories, as these theories imply that frequency is small compared to the resonant (scattering) frequency of individual pores.
The case of resonance scattering (frequencies of incident and scattered light are close to the effective distance between conduction and spin-split-off bands of the AIIIBV-type semiconductor) is considered.
In organs such as leaves, flowers, and fruits, in which the growth is determinate, the divisions of meristematic cells become more widely scattered, and the frequency progressively falls as the proportion of the daughter cells that differentiate increases.
However, concerted evolution depends on genomic and biological factors such as the spatial distribution of the repeated genes (i.e. whether tandemly arranged or scattered) and the frequency of somatic and meiotic recombination, all features almost virtually unknown in dinoflagellates.
In the Raman scattering process, these vibrational frequencies shift scattered light away from the frequency of an incident laser beam by an amount that is characteristic of the functional groups present.
Humans and other tetrapods usually produce spontaneous otoacoustic emissions at several frequencies scattered throughout the range of audition [1],[2].
By applying a high-pass filter, static (low frequency) scattering components are suppressed while dynamic (high frequency) scattering components are preserved.
