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Proceedings Paper

New mixed LiGa0.5In0.5Se2 nonlinear crystal for the mid-IR
Author(s): Vitaliy Vedenyapin; Ludmila Isaenko; Alexander Yelisseyev; Sergei Lobanov; Aleksey Tyazhev; Georgi Marchev; Valentin Petrov
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Paper Abstract

LiGaSe2 and LiInSe2 are promising nonlinear crystals for conversion of laser radiation to the mid-IR spectral range which are transparent down to the visible and UV. We successfully grew a new mixed crystal as a solid solution in the system LiGaSe2 - LiInSe2, with a composition of LiGa0.5In0.5Se2 which has the same orthorhombic structure (mm2) as the parent compounds (LiGaSe2 and LiInSe2). The new crystal is more technological with regard to the growth process in comparison with LiGaSe2 and LiInSe2 since its homogeneity range is broader in the phase diagram. We established that about 10% of the Li ions are found in octahedral position with coordination number of 3. The band-gap of LiGa0.5In0.5Se2 is estimated to be 2.94 eV at room temperature. The transparency at the 0-level extends from 0.47 to 13 μm. The dispersion of the principal refractive indices was measured and Sellmeier equations were constructed. The fundamental wavelength range for the SHG process extends from 1.75 to 11.8 μm. The nonlinear coefficients of LiGa0.5In0.5Se2 have values between those of LiGaSe2 and LiInSe2.

Paper Details

Date Published: 22 February 2011
PDF: 8 pages
Proc. SPIE 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X, 79171L (22 February 2011); doi: 10.1117/12.874504
Show Author Affiliations
Vitaliy Vedenyapin, Institute of Geology and Mineralogy (Russian Federation)
Ludmila Isaenko, Institute of Geology and Mineralogy (Russian Federation)
Alexander Yelisseyev, Institute of Geology and Mineralogy (Russian Federation)
Sergei Lobanov, Institute of Geology and Mineralogy (Russian Federation)
Aleksey Tyazhev, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Georgi Marchev, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Valentin Petrov, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)


Published in SPIE Proceedings Vol. 7917:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X
Konstantin L. Vodopyanov, Editor(s)

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