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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Speckle patterns generated in a disordered medium carry a lot of informationdespite the apparent complete randomness in the intensity pattern. When themedium possesses $\chi^{(2)}$ nonlinearity, the speckle is sensitive to thephase of the incident fundamental light, as well as the light generated within.Here, we examine the speckle decorrelation in the fundamental andsecond-harmonic transmitted light as a function of varying power in thefundamental beam. At low incident powers, the speckle patterns produced bysuccessive pulses exhibit strong correlations, that decrease with increasingpower. The average correlation in the second-harmonic speckle decays fasterthan in the fundamental speckle. Next, we construct a theoretical model, backedup by numerical computations, to obtain deeper physical insights on the fasterdecorrelations in the second-harmonic light. Whilst providing excellentqualitative agreement with the experiments, the model sheds important light onthe contribution of two effects in the correlations, namely, the generation ofsecond-harmonic light, and the propagation thereof.

Speckle decorrelation in fundamental and second-harmonic light scattered from nonlinear disorder