Nonlinear LiBIIICYI2 crystals for mid-IR and far-IR: Novel aspects in crystal growth

Isaenko, L. I.; Vasilyeva, I.G.

doi:10.1016/j.jcrysgro.2007.11.201

Cited by 79 publications

(56 citation statements)

References 20 publications

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“…Lithium thiogallate LiGaS 2 (LGS) is a noncentrosymmetric crystal with appropriate birefringence and relatively high NLO coefficients promising for effective optical frequency conversion [19][20][21]. The crystal structure of LGS, space group Pbn2 1 , a = 6.5133 Å, b = 7.8629 Å, c = 6.2175 Å, is determined by singlecrystal analysis to be a dense packing of atoms with tetrahedral and octahedral cavities [19,22].…”

Section: Introductionmentioning

confidence: 99%

“…One half of the tetrahedron cavities are occupied by Li + and Ga 3+ cations, whereas the other half of the tetracavities and all octacavities are empty. During recent years further progress in LGS crystal growth technology has been achieved and centimeterscale single-crystal volumes of optical quality are available today [21]. As to other properties of LGS, the information is very limited.…”

Section: Introductionmentioning

confidence: 99%

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Core level photoelectron spectroscopy of LiGaS2 and Ga–S bonding in complex sulfides

Atuchin

Isaenko

Kesler

et al. 2010

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Core level photoelectron spectroscopy of LiGaS2 and Ga–S bonding in complex sulfides

Atuchin

Isaenko

Kesler

et al. 2010

Journal of Alloys and Compounds

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“…The train of femtosecond laser pulses was first split into a "pump" and a "probe" beams. The THz wave was generated in the LT- Table 1 The nonlinear coefficients of chalcogenide crystals [13,[16][17][18]. GaAs or the chalcogenide crystal by pump beam and then focused onto the LT-GaAs detector using a set of off-axis parabolic mirrors.…”

Section: Methodsmentioning

confidence: 99%

“…Because of their wide band-gap, they can emit and receive light over a wide frequency range without absorption losses [12][13][14][15][16][17][18][19][20][21][22][23][24]. As for the THz emission from chalcogenide crystals, the broadband THz radiation from the surface illuminated CuInSe 2 by 810-nm femtosecond laser pulses has been reported [25].…”

mentioning

confidence: 99%

Terahertz Generation and Optical Properties of Lithium Ternary Chalcogenide Crystals

Takeya

Takemoto

Kawayama

et al. 2011

J Infrared Milli Terahz Waves

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We have investigated the generation of THz radiation in lithium ternary compounds LiInSe 2 , LiGaSe 2 , LiInS 2 , LiGaS 2 and characterized these materials by THz time-domain spectroscopy. Using 800 nm femtosecond excitation pulse, all crystals produce THz radiation due to an optical rectification corresponding to the nonlinear optical coefficient d 33 . We have measured refractive indices along the x-axis and the z-axis for all crystals in the range 150-700 μm and fitted them by using Sellmeier equation. With respect to the obtained results, velocity-matching between the incident laser pulse and the generated THz wave cannot be achieved at 800 nm, but for shorter wavelengths. Hence, an enhanced THz generation in Lithium ternary compounds may be observed by using a laser emitting below 800 nm.

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“…The annealed LGISe crystals show a dark red luminescence under UV excitation at 365 nm (Figure 1c). In [18] the process of incongruent evaporation was studied in detail for both LISe and LGSe compounds at temperatures near the melting point. The perfection of a bulk crystal of certain composition depends on the growth conditions such as the maximum temperature and the time of melt overheating.…”

Section: Crystal Growth and Structurementioning

confidence: 99%

Properties of LiGa0.5In0.5Se2: A Quaternary Chalcogenide Crystal for Nonlinear Optical Applications in the Mid-IR

et al. 2016

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LiGaSe 2 (LGSe) and LiInSe 2 (LISe) are wide band-gap nonlinear crystals transparent in the mid-IR spectral range. LiGa 0.5 In 0.5 Se 2 (LGISe) is a new mixed crystal, a solid solution in the system LGSe-LISe, which exhibits the same orthorhombic structure (mm2) as the parent compounds in the same time being more technological with regard to the growth process. In comparison withLGSe and LISe its homogeneity range is broader in the phase diagram. About 10% of the Li ions in LGISe occupy octahedral positions (octapores) with coordination number of 3. The band-gap ofLGISe is estimated to be 2.94 eV at room temperature and 3.04 eV at 80 K. The transparency at the 0-level extends from 0.47 to 13 µm.LGISe crystals exhibit luminescence in broad bands centered near 1.7 and 1.25 eV which is excited most effectively by band-to-band transition. From the measured principal refractive indices and the fitted Sellmeier equations second-harmonic generation from 1.75 to 11.8 µm (fundamental wavelength) is predicted. The nonlinear coefficients of LGISe have values between those of LGSe and LISe. 6 LGISe crystals are considered promising also for detection of thermal neutrons.

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Nonlinear LiBIIICYI2 crystals for mid-IR and far-IR: Novel aspects in crystal growth

Cited by 79 publications

References 20 publications

Core level photoelectron spectroscopy of LiGaS2 and Ga–S bonding in complex sulfides

Core level photoelectron spectroscopy of LiGaS2 and Ga–S bonding in complex sulfides

Terahertz Generation and Optical Properties of Lithium Ternary Chalcogenide Crystals

Properties of LiGa0.5In0.5Se2: A Quaternary Chalcogenide Crystal for Nonlinear Optical Applications in the Mid-IR

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