Two-photon holographic recording in LiTaO3:Fe crystals with high intensity nanosecond pulses at 532 nm

Steinberg, Ilya Sh.; Atuchin, Victor V.

doi:10.1016/j.matchemphys.2020.122956

Cited by 10 publications

(6 citation statements)

References 51 publications

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“…The group overlap integrals S dpt ≈ 0.0054, S dpt ≈ 0.0189, S ds ≈ 0.0155 and A ≈ 1.4023 can be calculated from the Slater-type self-consistent field (SCF) functions by using the reference distance R (= (R 1 + R 2 )/2 ≈ 2.176 Å). Then, the normalization factors N γ and the mixing coefficients λ γ can be calculated from Equations (7) and (8). The SOC coefficients ζ (ζ') and the orbital reduction factors k (k') may be determined from Equation (9).…”

Section: Calculations Of Cluster Approachmentioning

confidence: 99%

“…Especially, the optical damage in TM-doped LiTaO 3 is interesting for holographic memory applications and has caught the extensive attention of researchers. [8][9][10] Usually, these properties can be closely related to the defect structures and electronic states of the doped TM ions. Electron paramagnetic resonance (EPR) has long been considered one of the most useful tools to get information on the configuration and local structure of the doped paramagnetic ions.…”

Section: Introductionmentioning

confidence: 99%

“…8 , with θ 0 = 90 of the cubic case) due to the JT effect. Obviously, the above local lattice distortions due to the JT elongation make the original trigonally-distorted octahedra [LiO 6 ] 11À of host Li + T A B L E 1 The local impurity-ligand bond distances (R jj and R ⊥ , unit in Ǻ), the planar bond angle θ, the normalization factors N γ (γ = t and e), and the orbital admixture coefficients λ γ and λ s , the SOC coefficients ζ and ζ' (in cm À1 ) and the orbital reduction factors k and k' for Cu 2+ centers in LiTaO 3 .…”

mentioning

confidence: 99%

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Theoretical studies on the local structure and spin Hamiltonian parameters for Cu²⁺ ions in LiTaO₃ crystal

Chen,

Tang,

Cai

et al. 2023

Magnetic Reson in Chemistry

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The local structure and spin Hamiltonian parameters (SHPs) g factors (gx, gy, gz) and the hyperfine structure constants (Ax, Ay, Az) for Cu2+ doped in the LiTaO3 crystal are theoretically investigated by the perturbation formulas for a 3d9 ion under rhombically elongated octahedral based on the cluster approach. The impurity Cu2+ was assumed to occupy the host trigonally‐distorted octahedral Li+ site and experience the Jahn–Teller (JT) distortion from the host trigonal octahedral [TaO6]10− to the impurity rhombically elongated octahedral [CuO6]10−. Based on the calculations, the impurity‐ligand bond lengths parallel and perpendicular to the C2‐axis are found to be R||(≈ 2.305 Å) and R⊥ (≈ 2.112 Å) for the studied [CuO6]10− cluster, with the planar bond angle θ (≈ 78.2°). Meanwhile, the ground‐state wave function for Cu2+ center in LiTaO3 was also obtained. The calculated SHPs based on the above local lattice distortions agree well with the experimental data, and the results are discussed.

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Section: Calculations Of Cluster Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Theoretical studies on the local structure and spin Hamiltonian parameters for Cu²⁺ ions in LiTaO₃ crystal

Chen,

Tang,

Cai

et al. 2023

Magnetic Reson in Chemistry

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“…Ferroelectrics and relaxor ferroelectrics are materials that exhibit high electrostriction. This functional materials group is becoming valuable for wide technological applications such as transducers, multilayer capacitors, micromechanical systems, pyroelectric detectors, and electro-optical switches [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability and Non-Linear Optical and Dielectric Properties of Lead-Free K0.5Bi0.5TiO3 Ceramics

Czaja,

Szostak,

Hetmańczyk

et al. 2024

Materials

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Lead-free K0.5Bi0.5TiO3 (KBT) ceramics with high density (~5.36 g/cm3, 90% of X-ray density) and compositional purity (up to 90%) were synthesized using a solid-state reaction method. Strongly condensed KBT ceramics revealed homogenous local microstructures. TG/DSC (Thermogravimetry-differential scanning calorimetry) techniques characterized the thermal and structural stability of KBT. High mass stability (>0.4%) has proven no KBT thermal decomposition or other phase precipitation up to 1000 °C except for the co-existing K2Ti6O13 impurity. A strong influence of crystallites size and sintering conditions on improved dielectric and non-linear optical properties was reported. A significant increase (more than twice) in dielectric permittivity (εR), substantial for potential applications, was found in the KBT-24h specimen with extensive milling time. Moreover, it was observed that the second harmonic generation (λSHG = 532 nm) was activated at remarkably low fundamental beam intensity. Finally, spectroscopic experiments (Fourier transform Raman and far-infrared spectroscopy (FT-IR)) were supported by DFT (Density functional theory) calculations with a 2 × 2 × 2 supercell (P42mc symmetry and C4v point group). Moreover, the energy band gap was calculated (Eg = 2.46 eV), and a strong hybridization of the O-2p and Ti-3d orbitals at Eg explained the nature of band-gap transition (Γ → Γ).

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“…[1][2][3][4] Among their most appealing applications are optical coding and information storage, which, compared to conventional datastorage technologies, benefit from ultrafast switching, immediate access, large capacity, and high durability. [5][6][7] So far, such applications could rely only on singleor dual-mode UV/NIR-excited luminescent materials (down-shifting and/or upconverting), [5,6,[8][9][10][11] while there is no report on bimodal optical coding or data storage based on different, fully NLO parametric and nonparametric phenomena to date.…”

Section: Introductionmentioning

confidence: 99%

Multimodal Optically Nonlinear Nanoparticles Exhibiting Simultaneous Higher Harmonics Generation and Upconversion Luminescence for Anticounterfeiting and 8‐bit Optical Coding

Runowski,

Woźny,

Martín

et al. 2023

Adv Funct Materials

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Nonlinear optical materials are essential in areas such as nanophotonics, optical information processing, and biomedical imaging. However, nanomaterials employed for these diverse applications to date are efficient only for one type of nonlinear optical activity. Herein, the first multimodal nonlinear optically active class of nanomaterials based on lanthanide‐doped lithium niobate nanoparticles, whi simultaneously exhibit unprecedentedly efficient second and third harmonic generation, as well as up‐conversion photoluminescence, is rep. These dielectric nanoparticles retain their high nonlinear optical conversion efficiency both as powder and as aqueous colloidal solution. The high stability also allows for the fabrication of optically active biocompatible micron‐sized fibers and polymer‐based 3D‐printable objects, as well as for fingerprint detection. Finally, the first 8‐bit coding platform purely based on multimodal nonlinear optical activity originating from different parametric and nonparametric processes is, showcasing the technological potential of these materials for botanti‐counterfeiting and advanced optical information processing.

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Two-photon holographic recording in LiTaO3:Fe crystals with high intensity nanosecond pulses at 532 nm

Cited by 10 publications

References 51 publications

Theoretical studies on the local structure and spin Hamiltonian parameters for Cu²⁺ ions in LiTaO₃ crystal

Theoretical studies on the local structure and spin Hamiltonian parameters for Cu²⁺ ions in LiTaO₃ crystal

Thermal Stability and Non-Linear Optical and Dielectric Properties of Lead-Free K0.5Bi0.5TiO3 Ceramics

Multimodal Optically Nonlinear Nanoparticles Exhibiting Simultaneous Higher Harmonics Generation and Upconversion Luminescence for Anticounterfeiting and 8‐bit Optical Coding

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Two-photon holographic recording in LiTaO3:Fe crystals with high intensity nanosecond pulses at 532 nm

Cited by 10 publications

References 51 publications

Theoretical studies on the local structure and spin Hamiltonian parameters for Cu2+ ions in LiTaO3 crystal

Theoretical studies on the local structure and spin Hamiltonian parameters for Cu2+ ions in LiTaO3 crystal

Thermal Stability and Non-Linear Optical and Dielectric Properties of Lead-Free K0.5Bi0.5TiO3 Ceramics

Multimodal Optically Nonlinear Nanoparticles Exhibiting Simultaneous Higher Harmonics Generation and Upconversion Luminescence for Anticounterfeiting and 8‐bit Optical Coding

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Theoretical studies on the local structure and spin Hamiltonian parameters for Cu²⁺ ions in LiTaO₃ crystal

Theoretical studies on the local structure and spin Hamiltonian parameters for Cu²⁺ ions in LiTaO₃ crystal