On the possibility of domain structure formation in lithium niobate by low energy (< 5 keV) electron beam

Авторы: Kokhanchik L.S., Rau E.I., Emelin E.V., Zykova E.Yu
Журнал: Optical Materials
Том: 157
Год издания: 2024
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 116314
DOI: 10.1016/j.optmat.2024.116314
Аннотация: The authors’ assumption about the possibility of nanodomain generation in the ferroelectric LiNbO3 by relatively low energy (<5 keV) electron beams has been experimentally confirmed. The calculated electron-induced electric fields and changes in the polarization state of the near-surface layer in the -Z cut of LiNbO3 agree with the experimental results at the energies of the primary electrons Eb = 1 and 3 keV. In the proposed four- layer model of surface charging by low-energy electrons, electron-stimulated desorption of compensating atoms and molecules from the contaminated absorbing film into a vacuum plays an important role. The pre- sented new results confirming the formation of domains in the near-surface layer at low electron beam energy can expand the possibilities of domain engineering using electron beam technologies, especially in the field of photonics.
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