Electro-optic, Piezoelectric and Dielectric Properties of Langasite (La3Ga5SiO14), Langanite (La3Ga5.5Nb0.5O14) and Langataite (La3Ga5.5Ta0.5O14)

Stade, J.; Bohatý, L.; Hengst, M.; Heimann, Robert B.

doi:10.1002/1521-4079(200210)37:10<1113::aid-crat1113>3.0.co;2-e

Cited by 110 publications

(40 citation statements)

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“…where d and n are the appropriate thickness and refractive index [10] of the layer, respectively; φ0 -is the angle of the incidence of light on the sample; λ -wavelength of incident light; m -order of interference.…”

Section: Influence Of Irradiationmentioning

confidence: 98%

RADIATION-INDUCED DEFECTS AND DICHROISM IN La₃Ga_5,5Ta_0,5O₁₄ CRYSTALS

Козлова¹,

Бузанов²,

Козлова³

et al. 2016

RadJ

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Abstract. We investigated the transmission spectra of the langatate (LGT, La3Ga5,5Ta0,5O14) crystals grown in different conditions (crucible -Ir or Pt, growth atmosphere -air, pure Ar, Ar with addition of oxygen 2% or less then 2%), in the initial state and after electron irradiation. We observed dichroism in these crystals. Dichroism indicates the anisotropy of defect centers. We obtained the dependence of transmission on the irradiation dose and found that electron irradiation causes a decrease of transmission in the wavelength range 250-700 nm. On the transmission spectra in the infrared region, we observed oscillations, which can presumably refer to the formation of a layered structure as a result of irradiation. We have calculated the thickness of the formed layer. Luminescent characteristics of LGT crystals depend on growth conditions. Intensity of luminescence in LGT (Ar+(2%)O2) is lower than in LGT (Ar). Electron irradiation leads to the reduction of intensity. The observed luminescence in langatate crystals is provided by different luminescent centers.

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Section: Influence Of Irradiationmentioning

confidence: 98%

RADIATION-INDUCED DEFECTS AND DICHROISM IN La₃Ga_5,5Ta_0,5O₁₄ CRYSTALS

Козлова¹,

Бузанов²,

Козлова³

et al. 2016

RadJ

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“…Despite being classified into disordered langasite type, LGS, LGN, and LGT have different ionic distributions [24]. of the B site, and Ga 3+ ions occupy C and D sites, plus half of the B site.…”

Section: Structure and Property Of Langasite Familymentioning

confidence: 99%

“…Since 2002, LGS has been promoted as a potential EO crystal owing to its large EO coefficients, high LDT, and excellent physicochemical stability [31]. The linear EO properties of LGS crystal were measured to be 11 = −2.68 pm/V and 41 = 1.22 pm/V in 2002 [24]. And then, those values of LGS were refined to be 2.3 and 1.8 pm/V by our group [36].…”

Section: Electrooptical (Eo) Q-switch Applicationsmentioning

confidence: 99%

“…It has been determined that the effect of optical activity on the electrooptic process can be eliminated by reversing the effect, which means that light propagating along the optic -axis should be reversed to propagate along the -axis. In addition, the EO coefficients of LGN and LGT were also measured by Stade's group [24]. They have a comparable 11 (−2.62 and −2.82 pm/V) with LGS (−2.68 pm/V).…”

Section: Electrooptical (Eo) Q-switch Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Lan

Liang

Lin

et al. 2017

International Journal of Optics

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Midinfrared (IR) nonlinear optical (NLO) materials with high performance are vital in important technological applications in many civil and military fields. Very recently, langasite family compounds have attracted much attention due to their wide transparency to mid-IR region and ultrahigh laser damage threshold (LDT). In this brief review, three important compounds-LGS, LGN, and LGT-are investigated and analyzed based on available experimental data. The electrooptical (EO) Q-switch and mid-IR OPO applications are summarized in detail. Finally, promising search directions for new metal oxides that have good mid-IR NLO performances are discussed.

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“…For example, since phase-matched optical SHG is also possible in several compounds with CGG structure such as LGN and LGT, intense research is conducted to develop materials with optimized properties in terms of reduced electrical conductivity at high temperature, smaller anisotropy of thermal expansion, and improved temperature-compensated orientations [135]. However, there is a pronounced increase of dielectric losses above 350 C, most probably induced by a significant rise in electric conductivity [136]. This fact limits piezoelectric application at higher temperatures.…”

Section: Calcium Gallium Germanate (Cgg) Compoundsmentioning

confidence: 99%

Ceramics, Electronic

Blum¹,

Heimann²

2011

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Introduction 2. Theoretical Background 2.1. Dielectric Effects and Classification of Dielectrics 2.2. Characteristic Dielectric Parameters 3. Linear Dielectrics 3.1. Al 2 O 3 3.2. New Substrate Materials 3.3. Polymer–Ceramic Composites 4. Nonlinear Dielectrics 4.1. Physics of Ferro‐ and Piezoelectricity 4.2. BaTiO 3 (BT) 4.3. PbTiO 3 , PbZrO 3 , PbTiO 3 –PbZrO 3 4.3.1. Crystal Structures, Processing, and Properties 4.3.2. Applications 4.4. PLZT 4.5. Pb(Mg 1/3 Nb 2/3 )O 3 /Pb(Zn 1/3 Nb 2/3 )O 3 (PMN/PZN) 4.6. PbNb 2 O 6 4.7. LiNbO 3 , LiTaO 3 4.8. Lead‐Free Perovskites 4.9. Calcium Gallium Germanate (CGG) Compounds 4.10. Other Materials 5. Semiconducting Ceramics 5.1. SiC 5.1.1. Structure and Properties 5.1.2. Single‐Crystal Growth 5.1.3. Doping and Device Fabrication 5.1.4. Applications 5.2. TiO 2 6. Superconducting Ceramics 7. Sensor Materials 7.1. Oxide‐Based Sensors 7.2. Ferroic, Smart, and Intelligent Sensors

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Electro-optic, Piezoelectric and Dielectric Properties of Langasite (La3Ga5SiO14), Langanite (La3Ga5.5Nb0.5O14) and Langataite (La3Ga5.5Ta0.5O14)

Cited by 110 publications

References 1 publication

RADIATION-INDUCED DEFECTS AND DICHROISM IN La₃Ga_5,5Ta_0,5O₁₄ CRYSTALS

RADIATION-INDUCED DEFECTS AND DICHROISM IN La₃Ga_5,5Ta_0,5O₁₄ CRYSTALS

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Ceramics, Electronic

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Electro-optic, Piezoelectric and Dielectric Properties of Langasite (La3Ga5SiO14), Langanite (La3Ga5.5Nb0.5O14) and Langataite (La3Ga5.5Ta0.5O14)

Cited by 110 publications

References 1 publication

RADIATION-INDUCED DEFECTS AND DICHROISM IN La3Ga5,5Ta0,5O14 CRYSTALS

RADIATION-INDUCED DEFECTS AND DICHROISM IN La3Ga5,5Ta0,5O14 CRYSTALS

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

Ceramics, Electronic

Contact Info

Product

Resources

About

RADIATION-INDUCED DEFECTS AND DICHROISM IN La₃Ga_5,5Ta_0,5O₁₄ CRYSTALS

RADIATION-INDUCED DEFECTS AND DICHROISM IN La₃Ga_5,5Ta_0,5O₁₄ CRYSTALS