A5075772805- Photorefractive and Nonlinear Optics
- Acoustic Wave Resonator Technologies
- Solid-state spectroscopy and crystallography
- Optical and Acousto-Optic Technologies
- Ferroelectric and Piezoelectric Materials
- Photonic and Optical Devices
- Semiconductor materials and devices
- Crystal Structures and Properties
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Luminescence Properties of Advanced Materials
- Gyrotron and Vacuum Electronics Research
- Magnetic and transport properties of perovskites and related materials
- Ultrasonics and Acoustic Wave Propagation
A.V. Shubnikov Institute of Crystallography
2022-2024
Russian Academy of Sciences
2022-2024
National University of Science and Technology
2018-2023
Institute of Microelectronics Technology and High Purity Materials
2021-2023
Federal Scientific Research Centre Crystallography and Photonics
2022-2023
Fomos-Materials (Russia)
2020-2021
Ferroelectric LiNb1-xTaxO3 solid solutions with various Nb/Ta ratio were grown from the melt by Czochralski method. The exact composition of crystals was determined inductively coupled plasma atomic mass spectrometry. dependence crystal on initial obtained and explained a wide separation between phase boundaries liquid phases LiNbO3-LiTaO3 diagram. Using high-resolution X-ray diffraction, parameters c unit cell (LiNb0.88Ta0.12O3: = 5.1574 Å 13.8498 Å). Further, Curie temperature TC measured...
An in situ study of the spatial distribution piezoelectric properties an LiNb (1− x ) Ta O 3 crystal (〈 〉 = 0.088) external DC electric field was performed by method X-ray diffraction synchrotron radiation at angles close to 180°. The variation d 22 coefficient determined with high accuracy (up 2%) local areas angular shift maximum under action ( E 1582 V mm −1 applied on along Y axis, during scanning X and Z directions. A correlation between strain amplitude concentration tantalum obtained...
The propagation process of the surface acoustic waves (SAW) and pseudo-surface (PSAW) in a bonded layered structure 41° YX-cut LiNbO3 crystal/Si(100) crystal was investigated. scanning electron microscopy (SEM) method,in low-energy secondary electrons registration mode, made it possible to visualize SAW PSAW LiNbO3/Si structure. bulk were compared. It demonstrated that velocities exceed typical for Si single crystals. In structure, 4062 m/s, 4731 5871 m/s. also are same crystal.
This work describes the effects of various impacts (thermal, plasma, chemical) on X-cut lithium niobate surface and structure optical characteristics proton-exchanged waveguides. X-ray diffraction phase analysis, photoelectron spectroscopy, computed tomography, microscopy, non-contact 3D profilometry, prism coupling method were used to investigate composition layer waveguide properties. Pre-annealing at 500 °C improves structural homogeneity congruent thus enables fabricate waveguides a...
Lithium niobate and tantalate are among the most important widely used materials of acoustooptics acoustoelectronics. They have high piezoelectric constants enabling their use as actuators. Their is however restricted by thermal instability lithium crystals low Curie temperature T C crystals. Overcoming these drawbacks typical some compounds possible growing LiNb 1- x Ta O 3 single Good quality been grown using Czochralsky technique. High-temperature poling process has studied. The main...
Lithium niobate and lithium tantalate are among the most important widely used materials in acousto-optics acoustoelectronics. These have high values of piezoelectric constants, which makes it possible to use these as actuators; however, their is limited by thermal instability a crystal low Curie temperature ( T C ) crystal. LiNb (1-x) Ta x O 3 crystals overcome aforementioned limitations individual compounds. Crystals 0.5 were grown Czochralski method, good quality. Comparative studies...
This work describes the effects of various impacts (thermal, plasma, chemical) on X-cut lithium niobate surface structure and optical characteristics proton-exchanged waveguides. X-ray phase analysis, photoelectron spectroscopy, computed tomography, microscopy, non-contact 3D profilometry, prism coupling method were used to investigate composition layer waveguide properties. Pre-annealing at 500 °C improves structural homogeneity congruent thus enables fabricate waveguides a higher quality....