Photorefractive light needles in glassy nanodisordered KNTN

D. Pierangeli, J. Parravicini, F. Di Mei, G. B. Parravicini, A. J. Agranat, E. Del Re*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


We study the formation of 2D self-trapped beams in nanodisordered potassium-sodium-tantalate-niobate (KNTN) cooled below the dynamic glass transition. Supercooling is shown to accelerate the photorefractive response and enhance steady-state anisotropy. Effects in the excited state are attributed to the anomalous slim-loop polarization curve typical of relaxors dominated by non-interacting polar-nano-regions.

Original languageAmerican English
Pages (from-to)1657-1660
Number of pages4
JournalOptics Letters
Issue number6
StatePublished - 15 Mar 2014


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