Phase equilibrium studies in the PbTe–Ga2Te3 and PbTe–In2Te3 systems for growing new nonlinear optical crystals of PbGa6Te10 and PbIn6Te10 with transparency extending into the far-IR

Negative thermal expansion and electronic structure variation of chalcopyrite type LiGaTe2

“…Telluride crystalline materials are of great importance in modern microelectronics and photonics. [1][2][3][4][5][6][7][8][9][10][11][12] Because of specic features of metal-tellurium chemical bonds, tellurides possess narrow-bandgap semiconductor or metallic properties. 1,2,[6][7][8]11,12 Due to their low-wavenumber phonon spectrum, semiconductor tellurides are transparent in the mid-IR range and they can be used as optical window materials.…”

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

“…The calculated refractive indexes n x (= n y ) and n z dispersion curves of PGT and PIT crystals are plotted in Figure , which are localized in the wavelengths of 10–125 μm or frequencies of 30–2.40 THz range, respectively. The calculated refractive indexes of n 3 = n x n y n z are 29.4585 and 28.9562, and average refractive indexes are 3.0895 and 3.0723; the average refractive index of experimental determination is 3.06 and 3.03 at the wavelength of 10 μm for PGT and PIT crystals, respectively. The average refractive index is larger for PGT (cal.…”

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

“…The results presented in ref. 6 for PbIn 6 Te 10 in the system PbTe-In 2 Te 3 show that there exists a homogenous phase range within 13% mol. For such solid state alloys there occurs some heterovalence substitution of Pb 2+ and In 3+ .…”

“…5 Moreover these substitutions may lead to enhanced polarizability of the anionic clusters dening the principal linear and nonlinear optical susceptibility dispersions. 6 Following the equilibrium phase diagram for the PbTe-In 2 Te 3 (ref. 6) it is melt congruently at 903 K and possesses a homogenous phase range within 70-83% mol of In 2 Te 3 .…”

“…6 Following the equilibrium phase diagram for the PbTe-In 2 Te 3 (ref. 6) it is melt congruently at 903 K and possesses a homogenous phase range within 70-83% mol of In 2 Te 3 . Its crystalline structure was determined by Deiseroth and Müller 7 who found it to be trigonal (space group R32, a ¼ 1.4971 nm, c ¼ 1.8505 nm).…”