PbIn_6Te_10: new nonlinear crystal for three-wave interactions with transmission extending from 17 to 25 µm

Abstract

We have grown single crystals of PbIn 6 Te 10 , with clear transparency from 3 to 20 µm, and showed that this new nonlinear material possesses sufficient birefringence for phase-matching of three-wave parametric interactions and a nonlinear coefficient of 51 pm/V.

Negative thermal expansion and electronic structure variation of chalcopyrite type LiGaTe2

“…However, the number of known noncentrosymmetric tellurides is not big and, only for several crystals, the linear and nonlinear properties are obtained. [13][14][15][16][17][18][19][20][21][22] The high potential of LiGaTe 2 for the optical frequency conversion in the mid-IR spectral range has been demonstrated in several studies, and the structural and optical properties of this material were measured. 13,16,17,20,23 LiGaTe 2 is a positive uniaxial crystal and it has a chalcopyrite type structure (I 43d with the closest packing).…”

Theoretical Evaluation on Terahertz Source Generators from Ternary Metal Chalcogenides of PbM6Te10 (M = Ga, In)

“…Accordingly, the DFG conversion efficiencies of η d (=EFOM·FOC) are about 1.5467 × 10 –3 and 9.8476 × 10 –3 at the THz wavelengths of 41 μm for the PGT and PIT crystals, respectively. The zero-level transmission limit of about 31 μm was reported in ref . Accordingly, the DFG output wavelength is set at 31 μm and by the same experimental conditions as the simulation ones.…”

“…It is also found that the variations of NLO parameters d 11 of DFG optical processes versus wavelengths (or frequency) are very small within the THz zone (the zone localized at larger than the wavelength of 30 μm) for these two crystals. The measured SHG NLO coefficient d 11 of PIT was about 51 pm/V at the wavelength of 4.7 μm . The calculated dispersions of SHG d 11 are plotted in the Figure S1 of Supporting Information for the PGT and PIT crystals.…”

Experimental and theoretical study of the electronic structure and optical spectral features of PbIn6Te10

“…The crystals were grown by the Bridgman-Stockbarger 6 method. These crystals are transparent in the 1.5-30 mm spectral range 8 with absorption coefficient which does not exceed 0.5 cm À1 . The refractive index varies within 3-3.2.…”