TY - JOUR

T1 - Creation of periodical domain structure by local polarization reversal in planar waveguide produced by soft proton exchange in LiNbO3

AU - Savelyev, Evgeniy

AU - Akhmatkhanov, Andrey

AU - Slautin, Boris

AU - Tronche, Hervé

AU - Doutre, Florent

AU - Lunghi, Tommaso

AU - Baldi, Pascal

AU - Shur, Vladimir

N1 - The study was financially supported by the Ministry of Science and Higher Education of the Russian Federation within the Development Program of the Ural Federal University named after the first President of Russia, B. N. Yeltsin, in accordance with the program of strategic academic leadership "Priority-2030". The equipment of the Ural Center for Shared Use "Modern nanotechnology" at Ural Federal University (Reg. No. 2968), which is supported by the Ministry of Science and Higher Education RF (Project No. 075-15-2021- 677), was used.

PY - 2023

Y1 - 2023

N2 - 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. © 2023 The Author(s).

AB - 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. © 2023 The Author(s).

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U2 - 10.1142/S2010135X23500200

DO - 10.1142/S2010135X23500200

M3 - Article

VL - 13

JO - Journal of Advanced Dielectrics

JF - Journal of Advanced Dielectrics

SN - 2010-135X

IS - 06

M1 - 2350020

ER -