Lattice Parameters of Optical Damage Resistant In-Doped LiNbO3 Crystals

Sulyanov, S. N.; Volk, T. R.

doi:10.3390/cryst8050210

Cited by 9 publications

(6 citation statements)

References 32 publications

(66 reference statements)

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“…The extension of this framework onto the rest of the ODRI seems quite natural; it is also supported by further evidence found for In 3+ and Hf 4+ [173][174][175]. Based on the study of the structural properties of doped crystals, the available information has been recently updated for In 3+ and Zn 2+ [60,176], and extended for Zr 4+ [177].…”

mentioning

confidence: 69%

“…For a given doping concentration below the threshold values, these have shown effects qualitatively analogous to a Li enrichment, and overall, doped LN crystals show improved physical properties compared to pure and congruent crystals [7]. However, it is crucial to notice that, by doping with any kind of element, the structure is distorted to some extent; for ODRI in general, the unit cell volume increases with doping concentration [60,133,176], whereas, in the case of pure LN, it decreases in the elimination process of Nb antisites and Li vacancies. Moreover, in pure LN, the blue shifting of the fundamental absorption edge in going from off-stoichiometric compositions to the stoichiometric one is a well-known fact.…”

Section: Discussionmentioning

confidence: 99%

“…The supply is nowadays found by elemental doping (above certain threshold concentrations) of off-ST single crystals with a particular group of impurities termed 'optical-damage-resistant ions' (ODRI): divalent (Mg, Zn), trivalent (In, Sc), and tetravalent metals (Hf, Zr, Sn) [5,6,8,10,60]. Increment of the crystal density and phase transition temperature, together with a blue shift of the fundamental absorption edge, are the main characteristic effects that all these dopants share when they occupy a given site in the defect structure [10].…”

Section: Extrinsic Defectsmentioning

confidence: 99%

“…The other important topics mentioned in this section (hydroxyl ions, ODRI, elemental doping for PR-enhancement, and laser-emission) have also been discussed in detail by Volk and Wöhlecke (2008) [10]. These can be further consulted in References [86,87,94], [6,17,60], [17,61,125], and [73,74,126], respectively. In the lines that follow, we express our belief about the top 10 facts (or sets of facts) regarding extrinsic defects in LN.…”

Section: Extrinsic Defectsmentioning

confidence: 99%

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Lithium Niobate Single Crystals and Powders Reviewed—Part II

et al. 2020

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A review on lithium niobate single crystals and polycrystals has been prepared. Both the classical and recent literature on this topic is revisited. It is composed of two parts with several sections. The current part discusses the available defect models (intrinsic), the trends found in ion-doped crystals and polycrystals (extrinsic defects), the fundamentals on dilute magnetic oxides, and their connection to ferromagnetic behavior in lithium niobate.

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mentioning

confidence: 69%

Section: Discussionmentioning

confidence: 99%

Section: Extrinsic Defectsmentioning

confidence: 99%

Section: Extrinsic Defectsmentioning

confidence: 99%

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Lithium Niobate Single Crystals and Powders Reviewed—Part II

et al. 2020

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“…In general, a large number of articles have been devoted to LN crystals that were single-, double-, and even triple-doped with various metals in recent years [ 18 , 19 , 20 , 21 , 22 , 23 ]. Doping was carried out in order to reduce photorefractive sensitivity and create laser and holographic materials, etc.…”

Section: Introductionmentioning

confidence: 99%

Structure, Optical Properties and Physicochemical Features of LiNbO3:Mg,B Crystals Grown in a Single Technological Cycle: An Optical Material for Converting Laser Radiation

et al. 2023

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Two series of LiNbO3:Mg:B crystals have been grown and studied. Two doping methods—have been used. The crystals—have been co-doped with Mg and a non-metallic dopant, B. The physicochemical features of the growth—have been considered for LiNbO3:Mg:B crystals obtained from a boron-doped melt. The charge—has been prepared using different technologies: homogeneous (HG) and solid-phase (SP) doping. The same two methods have been used to grow single-doped LiNbO3:Mg crystals. A control near-stoichiometric (NSLN) crystal—has been grown via the HTTSSG (high-temperature top-seeded solution growth) method from a congruent melt (Li/Nb ≈ 0.946) with 5.5 wt% K2O. The characteristics of the LiNbO3:Mg:B crystals—have been compared with those of the LiNbO3:Mg and NSLN crystals. Physicochemical and structural reasons have been established for the differences in the distribution coefficients of magnesium (KD) during the growth of the HG- and SP-doped LiNbO3:B:Mg and LiNbO3:Mg crystals. The optical characteristics of the LiNbO3:B:Mg crystals—have been studied via optical spectroscopy, laser conoscopy and photoinduced light scattering (PILS). The influence of boron on the microstructure, compositional and optical uniformities and optical damage resistance of the LiNbO3:Mg:B crystals—has been estimated. Optimal technological approaches to growing optically uniform LiNbO3:B:Mg crystals have been determined. LiNbO3:Mg:B crystals have been shown to have a significant advantage over the commercially used LiNbO3:Mg crystals since large LiNbO3:Mg:B crystals can be grown without stripes. Such stripes usually appear perpendicular to the growth axis. In addition, the photorefractive effect is suppressed in LiNbO3:Mg:B crystals at lower magnesium concentrations ([Mg] ≈ 2.5 mol%) than in LiNbO3:Mg ([Mg] ≈ 5.5 mol%).

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High Photoresponsivity and Fast Response Speed Ferroelectric Photomemristor for Artificial Visual System Application

Zhao,

Wang,

et al. 2024

Adv Funct Materials

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Ferroelectric photoelectric devices show promising applications in artificial vision systems. However, this type of devices used in artificial vision systems exhibits low photoresponsivity and this limited cyclability of photocurrents, which hinders the progress of artificial vision systems. In this study, an artificial vision system is constructed with high photoresponsivity, fast photoresponse speed, and high read/write speed based on the Pd/PbZr0.4Ti0.6O3/La0.3Sr0.7MnO3/LaAlO3 ferroelectric photomemristor. The high optical response (18.86 nanoamperes) and read/write speeds (50 nanoseconds) of the device significantly improve the robustness and speed of the neuromorphic visual system while reducing power consumption for recognition. The artificial vision system developed in this study provides excellent real‐time image processing capabilities, including edge detection and classification with 100% accuracy for musical key patterns, and it is expected to offer great potential for the development of high‐performance self‐powered artificial vision systems.

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Lattice Parameters of Optical Damage Resistant In-Doped LiNbO3 Crystals

Cited by 9 publications

References 32 publications

Lithium Niobate Single Crystals and Powders Reviewed—Part II

Lithium Niobate Single Crystals and Powders Reviewed—Part II

Structure, Optical Properties and Physicochemical Features of LiNbO3:Mg,B Crystals Grown in a Single Technological Cycle: An Optical Material for Converting Laser Radiation

High Photoresponsivity and Fast Response Speed Ferroelectric Photomemristor for Artificial Visual System Application

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