English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Using a 3D Finite-Difference Time-Domain parallel code, we report on thelinear and nonlinear propagation of light pulses in a disordered assembly ofscatterers, whose spatial distribution is generated by a Molecular Dynamicscode; refractive index dispersion is also taken into account. We calculate thestatic and dynamical diffusion constant of light, while considering a pulsedexcitation. Our results are in quantitative agreement with reportedexperiments, also furnishing evidence of a non-exponential decay of thetransmitted pulse in the linear regime and in the presence of localized modes.By using an high power excitation, we numerically demonstrate the``modulational instability random laser'': at high peak input powers energy istransferred to localized states from the input pulse, via third-ordernonlinearity and optical parametric amplification, and this process is signedby a power-dependent non-exponential time-decay of the transmitted pulse.Comment: 5 pages, 4 figures. Revised version with new figure 4 with localized  state

Light diffusion and localization in three-dimensional nonlinear disordered media