نتایج جستجو برای: random medium
تعداد نتایج: 514304 فیلتر نتایج به سال:
We consider two related models for the propagation of a curvature sensitive interface in time independent random medium. In both cases we suppose that medium contains obstacles act on with an inhibitory or acceleratory force. show remains bounded all times even when small constant external driving force is applied. This phenomenon has already been known only are present. this work extend result...
The wave propagation in a random medium plays critical role optics and quantum physics. Multiple scattering of coherent determines the transport procedure. Brownian motions scatterers perturb each trajectory form dynamic speckle patterns backscattered direction. In this study, we applied matrix theory to investigate eigenvalue density intensity matrix. We find that can be utilized decouple sing...
Random lasers are a developing class of light sources that utilize a highly disordered gain medium as opposed to a conventional optical cavity. Although traditional random lasers often have a relatively broad emission spectrum, a random laser that utilizes vibration transitions via Raman scattering allows for an extremely narrow bandwidth, on the order of 10 cm(-1). Here we demonstrate the firs...
In this paper we analyze wave propagation in three-dimensional random media. We consider a source with limited spatial and temporal support that generates spherically diverging waves. The waves propagate in a random medium whose fluctuations have small amplitude and correlation radius larger than the typical wavelength but smaller than the propagation distance. In a regime of separation of scal...
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