najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМОnajo-1087Research ArticlePHYSICSФИЗИКАSurface acoustic wave ferroelectric phononic crystal tunable by electric fieldPashchenkoV. P.

Saint Petersburg

v.paschenko@gmail.comSaint Petersburg State Polytechnical University; Avangard JSCRussian Federation20131708202545630–634Copyright © Pashchenko V.P., 20252025Pashchenko V.P.Pashchenko V.P.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/1087

Theoretical investigation results of the periodic domain structures induced by an electric field in barium strontium titanate (BaxSr1−x)TiO3 ferroelectric thin film are presented. A novel type of tunable phononic crystal based on an electric field-induced piezoelectric effect in a thin ferroelectric film is proposed. Surface acoustic wave propagation equations for the substrate under electric field-induced periodic domains are derived. Finite element simulation revealed the possibility of applying the ferroelectric phononic crystal as an electrically tunable surface acoustic wave filter.

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The authors declare that there are no conflicts of interest present.