The physical basis of the domain engineering in ferroelectrics and its application to lithium niobate crystals were reviewed. unified kinetic approach structure evolution electric field was formulated validity for understanding variety observed scenarios demonstrated. kinetics statics family including congruent, stoichiometric, MgO doped ones have been discussed. main stages periodical poling process related problems pointed out. basic techniques applied creation structures bulk waveguides...

The chemical vapor deposition (CVD) of molybdenum disulfide (MoS2) single-layer films onto periodically poled lithium niobate is possible while maintaining the substrate polarization pattern. MoS2 growth exhibits a preference for ferroelectric domains polarized "up" with respect to surface so that film may be templated by pattern without need further lithography. monolayers preserve domains, slightly quenching on "down" as revealed piezoresponse force microscopy. Electrical transport...

The utilization of charged domain walls (CDWs) as nanoelectronic devices requires three technological aspects to be developed: (1) controllable CDW creation, (2) tuning geometry, and (3) removal. We have studied formation in lithium niobate single crystals during polarization reversal using liquid solid-state electrodes, well their combination. It was shown that can formed by two alternative procedures: forward switching for the electrode at Z+ polar surface solid Z− one, backward one....

Journal of Advanced DielectricsAccepted Papers Open AccessMotion fast and superfast domain walls during polarization reversal in crystals lithium niobate familyI.A. Kipenko, A.R. Akhmatkhanov, V. Ya. ShurI.A. Akhmatkhanov Search for more papers by this author , Shurhttps://orcid.org/0000-0002-6970-7798 https://doi.org/10.1142/S2010135X2550002XCited by:0 (Source: Crossref) Next AboutFiguresReferencesRelatedDetailsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend Library...

Herein, the results of studying reflection stripe domains growing during polarization reversal in congruent lithium niobate single crystals modified by soft proton exchange are presented. The situ optical imaging reveals with growth directions along three equivalent Y crystallographic axes. When domain approaches standing one, its direction changes 120° to another axis. A strong difference on opposite polar surfaces is revealed: at Z + surface it occurs lower distances through two successive...

The field-induced evolution of as-grown domain structure was studied in an annealed calcium orthovanadate (CVO) crystal under application the electric field pulses at elevated temperature using various imaging methods. It shown that with charged walls (CDWs) bulk action represented sideways growth large domains and appearance unstable stable surface. caused by lowest charge density edges. screening retardation facilitated ledges CDWs, which grew external became after touching polar rare...

The shape of isolated domains has been investigated in congruent lithium tantalate (CLT) single crystals at elevated temperatures and analyzed terms kinetic approach. obtained temperature dependence the growing domain CLT including circular above 190 °C attributed to increase relative input isotropic ionic conductivity. observed nonstop wall motion independent growth after merging as opposed stoichiometric have difference orientation. computer simulation confirmed applicability approach explanation.

We present the experimental study of increase and decrease abnormal conduction current appeared during polarization reversal at elevated temperatures (120–250 °C) in stoichiometric MgO doped lithium niobate single crystals. It is shown that caused by existence through charged domain walls. The time dependence has been measured low electric field immediately after partial switching. maximal value crystal with walls 4–5 orders magnitude higher than initial state. activation energy 1.1 eV.

Periodical domain structuring by focused electron beam irradiation of MgO-doped lithium niobate (MgOCLN) single crystalline plate covered resist layer was studied both experimentally and computer simulation. The dependences size on the charge dose distance between isolated domains were measured. It has been shown that quality periodical pattern depends thickness energy. obtained periodic structures have divided into four types. parameters for most uniform patterning experimentally....

We report the successful inactivation of P. aeruginosa strain by femtosecond infrared (IR) laser radiation at resonant wavelengths 3.15 μm and 6.04 μm, chosen due to presence characteristic molecular vibrations in main structural elements bacterial cells these spectral ranges: amide groups proteins (1500-1700 cm-1), C-H membrane lipids (2800-3000 cm-1). The underlying bactericidal changes were revealed stationary Fourier-transform IR spectroscopy, with peaks parameters being obtained...

The ultrafast interaction of tightly focused femtosecond laser pulses with bulk dielectric media in direct writing (inscription) regimes is known to proceed via complex multi-scale light, plasma and material modification nanopatterns, which are challenging for exploration owing their mesoscopic, transient buried character. In this study, we report on the first experimental demonstration, analysis modeling hierarchical multi-period coupled longitudinal transverse nanogratings lithium niobate...

Potassium titanyl phosphate KTiOPO4 (KTP) crystals with periodical ferroelectric domain structures are one of the most promising materials for nonlinear optics, in which main types optical interactions have been demonstrated. Despite crucial importance situ visualization structure kinetics creation high quality gratings, there only a few works concerning KTP. We present results KTP time resolution down to 12.5 μs and simultaneous recording switching current data. The wide range wall...

The creation of the periodical domain patterns with a submicron period in lithium niobate on insulator (LNOI) wafers is key problem for nonlinear-optical applications, including second harmonic generation, backscattering optical parametric oscillator, etc. We have experimentally studied formation and evolution during local polarization reversal Z+ LNOI metal bottom electrode. It has been shown that growth occurs by spikes at charged wall (CDW). complicated shape isolated domains jagged CDW...

Ferroelectric nanodomains were formed in bulk lithium niobate single crystals near nanostructured microtracks laser-inscribed by 1030-nm 0.3-ps ultrashort laser pulses at variable pulse energies sub- and weakly filamentary nanopatterning regimes. The related characterized optical, scanning probe confocal second-harmonic generation microscopy methods. nanoscale material sub-structure the was visualized sample cross-sections atomic force (AFM), appearing birefringent polarimetric microscope...

Jerky domain wall motion during merging of neighboring domains in lithium niobate single crystals was studied details by using synchronized in-situ optical visualization and recording switching current shape. Several scenarios structure transformation were revealed classified. It has been shown that predetermined nucleation layer-by-layer mechanism are main reasons for observed jerky motion. On the basis analysis pulse shape step growth velocity estimated to be about 1 m/s. This value is...

The polarization reversal and domain structure evolution has been studied in stoichiometric lithium tantalate prepared by vapor transport equilibration process. first situ visualization of kinetics demonstrated the jump-like motion few strictly oriented plane walls, which leads to short isolated current pulses switching data. proposed model wall caused interaction with pinning centers representing areas increased value threshold field is based on effect retardation bulk screening. derived...

Light-trapping structures formed on surfaces of various materials have attracted much attention in recent years due to their important role many applications science and technology. This article discusses methods for manufacturing light-trapping "black" silicon, namely laser, chemical hybrid chemical/laser ones. In addition the widely explored laser texturing etching methods, we develop a method, consisting post-texturing pyramidal obtained after etching. After treatments surface morphology...

Lead magnesium niobate-lead titanate (PMN-PT) solid solutions are intensively studied for the last two decades due to their outstanding piezoelectric properties. However, despite strong interest, there is a lack of studies domain kinetics and structure evolution, which great importance development engineering in PMN-PT. We present results study during polarization reversal tetragonal PMN-PT single crystals by situ optical visualization accompanied analysis switching current. Three types...

We study the nonlinear Raman-Nath diffraction (NRND) of femtosecond laser pulses in a 1D periodic photonic structure. The calculated second-harmonic spectra represent frequency combs for different orders transverse phase matching. These are close analogy with well-known spectral Maker fringes observed single crystals. intensity second harmonic experiences redshift propagation angle, which is opposite case Čerenkov diffraction. analyze how NRND affected by group-velocity mismatch between...

The electronic conductivity was measured in single crystals of lithium niobate and tantalate family at elevated temperatures using direct electrometric method with original technique compensation pyroelectric current. Experimentally temperature dependences the bulk electrical along polar direction followed Arrhenius law activation energy ranging from 1.0 to 1.2 eV. It shown that intrinsic became main mechanism screening above 160°C. anisotropy studied MgOLN crystals.

The inscription regimes and formation mechanisms of form-birefringent microstructures inside nano-porous fused silica by tightly focused 1030- 515-nm ultrashort laser pulses variable energy levels pulsewidths in the sub-filamentary regime were explored. Energy-dispersion X-ray micro-spectroscopy 3D scanning confocal Raman revealed micro-tracks compacted multi-shot exposure with nanopores hydrodynamically driven on a microscale to their periphery. Nearly homogeneous polarimetrically acquired...

Kinetics of bulk screening depolarization field was studied in single crystalline lithium niobate and tantalate various compositions by analysis the switching current, birefringence contrast, diffraction coherent light on domain walls. The process quantitatively characterized several essential parameters, such as a type relaxation law, time constants, maximum value field. Advantages disadvantages used experimental methods were discussed. comparison obtained previously published results carried out.