Thermal and thermo-optic parameters of LiInSe2 single crystals

Optical, thermal, electrical, damage, and phase-matching properties of lithium selenoindate

“…, are roughly 25% lower that those known for LIS [12], they are still, however, 3-5 times larger than for AGS and AGSe crystals [60,63]. The room temperature values were confirmed in an independent measurement at Cleveland Crystals [8], which gives us confidence in their reliability.…”

“…For thermal conductivity and expansion measurements we cut and polished three cylinders from red color LISe with identical diameter and length, both equal to 5 mm, and with their axes parallel to one of the crystallographic (optical) axes. The thermal conductivity of LISe was measured in the 293-343 K temperature range under the monotonic heating regime using a Cλ-calorimeter [60,63]. The whole equipment was tested and calibrated with fused silica.…”

First-principles study of lattice dynamics and thermodynamic properties of LiInX2 (X=S, Se, Te)

“…The pyroelectricity, thermal conductivity, thermal expansion, and thermo-optic coefficients of LiInS 2 and LiInSe 2 were also measured by Yelisseyev et al [1,7]. Though the large-size LiInTe 2 crystals with high optical quality have not been successfully grown, the analog compound LiGaTe 2 has been demonstrated to be a promising material for OPO and SHG devices in the mid-IR [8,9].…”

“…Ternary lithium compounds LiInX 2 (X = S, Se, Te), which are considered as promising materials for nonlinear optical applications in the mid-IR, have recently attracted a lot of attention due to their unique optical properties: a wide transparency range; a sufficiently large birefringence; good thermo-mechanical properties and a small two-photon absorption coefficient [1][2][3][4][5][6]. The light Li + ions can not only enlarge the band gaps of these compounds and further lead to a high laser induced damage thresholds (LIDT), but also increase the frequencies of crystal lattice vibrations and the Debye temperature.…”

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

“…The LiBC 2 crystals have a larger band gap, which allows their pumping at relatively short wavelengths without any problem with two-photon absorption (TPA); their thermal conductivities are several times larger than those of AGS and AGSe, owing to the increase in lattice phonon energy and Debye temperature. High thermal conductivity and small thermooptic coefficients of LiBC 2 crystals minimize the thermal lensing effects [1][2][3][4][5][6][7][8] (Table 1). But to realize in a full extent a high-nonlinear potential of the LiB III C 2 VI crystals, one should have a large high-quality single crystals.…”