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. © 2014 Optical Society of America.
Photorefractive light needles in glassy nanodisordered KNTN / Pierangeli D.; Parravicini J.; Di Mei F.; Parravicini G.B.; Agranat A.J.; Del Re E.. - In: OPTICS LETTERS. - ISSN 0146-9592. - ELETTRONICO. - 39:(2014), pp. 1657-1660. [10.1364/OL.39.001657]
Photorefractive light needles in glassy nanodisordered KNTN
Parravicini J.;
2014
Abstract
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. © 2014 Optical Society of America.
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