Nonlinear optical memory effect

A. Fleming, C. Conti, Tom Vettenburg, Andrea Di Falco (Lead / Corresponding author)

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
175 Downloads (Pure)


Light propagating through random media produces characteristic speckle patterns, directly related to the large multitude of scattering events. These complex dynamics remarkably display robustness to perturbation of the incoming light parameters, maintaining correlation in the scattered wavefront. This behavior is known as the optical memory effect. Here we unveil the properties of the nonlinear optical memory effect, which occurs when an optothermal nonlinearity perturbs the random material. The effect is characterized through a series of pump and probe experiments in silica aerogel, in the visible range. This additional degree of freedom further generalizes the memory effect, opening the road to applications based on the nonlinear response of random media.

Original languageEnglish
Pages (from-to)4841-4844
Number of pages4
JournalOptics Letters
Issue number19
Early online date25 Sept 2019
Publication statusPublished - 1 Oct 2019

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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