Quasi two-dimensional astigmatic solitons in soft chiral metastructures

Urszula Laudyn , Paweł Jung , Miroslaw A. Karpierz , Gaetano Assanto

Abstract

We investigate a non-homogeneous layered structure encompassing dual spatial dispersion: continuous diffraction in one transverse dimension and discrete diffraction in the orthogonal one. Such dual diffraction can be balanced out by one and the same nonlinear response, giving rise to light self-confinement into astigmatic spatial solitons: self-focusing can compensate for the spreading of a bell-shaped beam, leading to quasi-2D solitary wavepackets which result from 1D transverse self-localization combined with a discrete soliton. We demonstrate such intensity-dependent beam trapping in chiral soft matter, exhibiting one-dimensional discrete diffraction along the helical axis and one-dimensional continuous diffraction in the orthogonal plane. In nematic liquid crystals with suitable birefringence and chiral arrangement, the reorientational nonlinearity is shown to support bell-shaped solitary waves with simple astigmatism dependent on the medium birefringence as well as on the dual diffraction of the input wavepacket. The observations are in agreement with a nonlinear nonlocal model for the all-optical response.
Author Urszula Laudyn ZOiF
Urszula Laudyn,,
- Optics and Photonics Division
, Paweł Jung ZOiF
Paweł Jung,,
- Optics and Photonics Division
, Miroslaw A. Karpierz ZOiF
Miroslaw A. Karpierz,,
- Optics and Photonics Division
, Gaetano Assanto
Gaetano Assanto,,
-
Journal seriesScientific Reports, ISSN 2045-2322
Issue year2016
Vol6
Pages1-9
Publication size in sheets0.5
DOIDOI:10.1038/srep22923
URL https://www.scopus.com/inward/record.uri?eid=2-s2.0-84961183522&partnerID=40&md5=408317da6dfba727612ebccdf0e05ed3
Languageen angielski
Score (nominal)40
ScoreMinisterial score = 40.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 4.259 (2) - 2016=4.847 (5)
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