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Registration Number

0222U003122, 0120U102204 , R & D reports

Title

Creating the innovative product for the most efficient and energy-efficient use of anisotropic and nanostructured materials in devices of electro-, acousto- and nonlinear optics

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Head

Zachek Ihor R., Доктор фізико-математичних наук

Registration Date

18-02-2022

Organization

Lviv Polytechnic National University

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In terms of photoelasticity and elasticity: for LiTaO3 crystals, working expressions for the calculation of piezooptical coefficients πim and some sums of πim coefficients were written, which were used to prove the reliability of the results of studying the piezooptical effect. For all possible geometries of the experiment, the half-wave and control ( ) voltages of these crystals were determined, and all components of the POK matrix were calculated on their basis, and the reliability of the values of these components was proved. All components of the pin of the tensor of elastic-optical coefficients were calculated on the basis of the matrix of POK πim lithium tantalate crystals and indicative surfaces were constructed on their basis, the anisotropy of these surfaces was analyzed and the most effective geometries of elastic-optical effect were determined. ktu. The velocities of acoustic waves in LiTaO3 crystals were determined by the method of superimposing reflected Papadakis pulses and all components of matrices of elastic constants and piezoelectric coefficients were calculated on their basis. An installation was created to study the signals of the 2nd harmonic generation, it was tested on model lithium niobate crystals LiNbO3 at a radius focused on a sample of a laser beam of about 100 μm. The obtained values of nonlinear optical coefficients coincide with the literature data within 5%. The study of the original and encapsulated membranes of AAO by the method of impedance spectroscopy in a wide frequency range. It is shown that low-dimensional structures based on mesoporous matrix Al2O3 encapsulated with KDP crystals can be efficient materials of nanoelectronics and energy, because these materials combine high values of dielectric constant with low values of the loss angle tangent in the radio frequency range.

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Adamiv Volodymyr T
Andrushchak Anatolii S
Balaban Oksana V
Buryi Oleh A
Danylov Andrii B
Demianyshyn Nataliia M
Kohut Zinovii O
Martyniuk-Lototska Iryna Yu
Mytsyk Bohdan H

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2022-03-09