Title :
New nonlinear AgGaGeS4, AgGaGe5S12, AgGaGe1.5Se5, AgGaGe5Se12 and HgGa2S4, Cd 0.35Hg0.65Ga2S4 crystals
Author :
Andreev, Yuri ; Badikov, Vladimir ; Geiko, Pavel ; Geiko, Lilya ; Panyutin, Vladimir ; Shevyrdyaeva, Galina
Author_Institution :
Inst. for Opt. Monitoring, Acad. of Sci., Tomsk, Russia
fDate :
26 Jun-3 Jul 2001
Abstract :
Optical linear and nonlinear properties of a number of new nonlinear crystals are investigated for the first time. AgGaGeS4 , AgGaGe5S12, AgGaGe1.5Se5 , AgGaGe5Se12, are solid solutions of AgGaS 2:GeS2(Se2) or mixed AgxGa xGe(1-x)S4(Se4) crystals, and also HgGa2S4, and Cd0.35Hg0.65 Ga2S4 are studied. AgxGax Ge(1-x)S4(Se4) biaxial crystals belong to mm2 point group symmetry, transparent in the range 450-13500 nm, are characterized with ny⩾nx>nz , phase-matchable for e→∞ interactions. Nonlinear second order susceptibilities d31 and d32 are about 12 and 8 pm/V for all of this crystal family. Efficient second order nonlinear susceptibility is as high as 24 pm/V for negative single axis HgGa2S4 and Cd0.35Hg0.65Ga2S4 crystals belonging to 4 point group symmetry, transparent in the 550-13500 nm range. The damage threshold of the new crystals for TEA CO2 laser emission is 1.7 to 2.2 times higher than for the popular middle IR ZnGeP2 crystals. CO2 laser SHG is realized for the first time in listed crystals. Sellmeier coefficients and detailed information of the investigation results are presented
Keywords :
cadmium compounds; gallium compounds; germanium compounds; mercury compounds; nonlinear optical susceptibility; optical harmonic generation; silver compounds; ternary semiconductors; transparency; 4 point group symmetry; 450 to 13500 nm; 550 to 13500 nm; AgGaGe1.5Se5; AgGaGe5S12; AgGaGe5Se12; AgGaGeS4; Cd0.35Hg0.65Ga2S4; HgGa2S4; SHG; mm2 point group symmetry; nonlinear optical properties; transparent; Crystals; Electrons; Frequency conversion; Infrared detectors; Laser theory; Magnetic fields; Nonlinear optics; Optical harmonic generation; Pump lasers; Solid lasers;
Conference_Titel :
Science and Technology, 2001. KORUS '01. Proceedings. The Fifth Russian-Korean International Symposium on
Conference_Location :
Tomsk
Print_ISBN :
0-7803-7008-2
DOI :
10.1109/KORUS.2001.975127
