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Electroacoustic waves in a PT-symmetric piezoelectric structure near the exceptional point
Vilkov E. A.
1, Byshevski-Konopko O.A.
1, Temnaya O. S.2, Kalyabin D. V.
2,3, Nikitov S. A.
2,3,4
1Fryazino Branch, Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Fryazino, Moscow oblast, Russia
2Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
3Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow Region, Russia
4Laboratory "Metamaterialy" Saratov State University, Saratov, Russia
2Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
3Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow Region, Russia
4Laboratory "Metamaterialy" Saratov State University, Saratov, Russia
Email: e-vilkov@yandex.ru, byshevski@ms.ire.rssi.ru, ostemnaya@gmail.com, dmitry.kalyabin@phystech.edu, nikitov@cplire.ru
The spectral properties of gap electroacoustic waves in PT-symmetric piezoelectric structures of symmetry class 6 are investigated theoretically. It was found out that, at a certain level of loss and gain in piezoelectrics, the symmetric and antisymmetric modes intersect. The intersection point defines an exceptional point of the PT-symmetric structure. It was shown that the frequency dependence of the amplitude at the exceptional point has an extremely narrow resonance peak, which opens up the possibility of creating supersensitive sensors based on PT-symmetric physical structures. Keywords: PT-symmetry, piezoelectrics, electroacoustic waves, gap structure.
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