Journal of Advanced Dielectrics, Volume. 13, Issue 6, 2350020(2023)

Creation of periodical domain structure by local polarization reversal in planar waveguide produced by soft proton exchange in LiNbO3

Evgeniy Savelyev1,2, Andrey Akhmatkhanov1, Boris Slautin1, Hervé Tronche2, Florent Doutre2, Tommaso Lunghi2, Pascal Baldi2, and Vladimir Shur1、*
Author Affiliations
  • 1Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Ekaterinburg, Russia
  • 2Institut de Physique de Nice, Université, Côte d’Azur, CNRS, 06108 Nice Cedex 2, France
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    The paper presents the results of an experimental study of the local polarization reversal and creation of domains by a biased tip of scanning probe microscope (SPM) in lithium niobate single crystals of congruent composition with a surface layer modified by soft proton exchange (SPE). The depth dependence of H+ ions concentration in the SPE-modified layer measured by confocal Raman microscopy demonstrates a sufficient composition gradient. The creation of isolated domains and stripe domain structures has been done by two switching modes: (1) point switching by field application in separated points and (2) line scanning switching by motion of the biased tip being in contact with the sample surface. For point switching for pulse durations less than 10s, the logarithmic dependence of the domain diameter on the pulse duration was observed. The change of the dependence to a linear one for pulse duration above 10s has been attributed to the transition from the stochastic step generation at the domain wall to the deterministic one at the domain vertexes. The periodical structure of stripe domains was created in SPE CLN planar waveguides by scanning at elevated temperature. The revealed switching regime suppresses electrostatic interaction of neighboring domains and leads to a significant improvement of the domain structure regularity. The creation of the stable periodical domain structure with submicron periods in SPE CLN planar waveguides was demonstrated.

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    Evgeniy Savelyev, Andrey Akhmatkhanov, Boris Slautin, Hervé Tronche, Florent Doutre, Tommaso Lunghi, Pascal Baldi, Vladimir Shur. Creation of periodical domain structure by local polarization reversal in planar waveguide produced by soft proton exchange in LiNbO3[J]. Journal of Advanced Dielectrics, 2023, 13(6): 2350020

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    Paper Information

    Category: Research Articles

    Received: Jul. 26, 2023

    Accepted: Sep. 20, 2023

    Published Online: Jan. 22, 2024

    The Author Email: Shur Vladimir (vladimir.shur@urfu.ru)

    DOI:10.1142/S2010135X23500200

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