Аннотация:first_pagesettingsOrder Article ReprintsOpen AccessArticleFerroelectric Nanodomain Engineering in Bulk Lithium Niobate Crystals in Ultrashort-Pulse Laser Nanopatterning Regimeby Sergey Kudryashov 1,2,*ORCID,Alexey Rupasov 1ORCID,Mikhail Kosobokov 2,Andrey Akhmatkhanov 2ORCID,George Krasin 1ORCID,Pavel Danilov 1,2ORCID,Boris Lisjikh 2ORCID,Anton Turygin 2ORCID,Evgeny Greshnyakov 2ORCID,Michael Kovalev 1,2ORCID,Artem Efimov 2 andVladimir Shur 2ORCID1Lebedev Physical Institute, 119991 Moscow, Russia2School of Natural Sciences and Mathematics, Ural Federal University, 620000 Ekaterinburg, Russia*Author to whom correspondence should be addressed.Nanomaterials 2022, 12(23), 4147; https://doi.org/10.3390/nano12234147Received: 3 November 2022 / Revised: 19 November 2022 / Accepted: 21 November 2022 / Published: 23 November 2022(This article belongs to the Special Issue Laser Synthesis and Processing of Nanostructured Materials)Download Browse Figures Review Reports Versions NotesAbstractFerroelectric nanodomains were formed in bulk lithium niobate single crystals near nanostructured microtracks laser-inscribed by 1030-nm 0.3-ps ultrashort laser pulses at variable pulse energies in sub- and weakly filamentary laser nanopatterning regimes. The microtracks and related nanodomains were characterized by optical, scanning probe and confocal second-harmonic generation microscopy methods. The nanoscale material sub-structure in the microtracks was visualized in the sample cross-sections by atomic force microscopy (AFM), appearing weakly birefringent in polarimetric microscope images. The piezoresponce force microscopy (PFM) revealed sub-100 nm ferroelectric domains formed in the vicinity of the embedded microtrack seeds, indicating a promising opportunity to arrange nanodomains in the bulk ferroelectric crystal in on-demand positions. These findings open a new modality in direct laser writing technology, which is related to nanoscale writing of ferroelectric nanodomains and prospective three-dimensional micro-electrooptical and nanophotonic devices in nonlinear-optical ferroelectrics.