Optical properties of the germanate melilites Sr 2 MgGe 2 O 7 , Sr 2 ZnGe 2 O 7  and Ba 2 ZnGe 2 O 7 | Zendy

Becker P. | Zendy; Held P. | Zendy; Liebertz J. | Zendy; Bohatý L. | Zendy

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Optical properties of the germanate melilites Sr 2 MgGe 2 O 7 , Sr 2 ZnGe 2 O 7 and Ba 2 ZnGe 2 O 7

Author(s) -

Becker P.,

Held P.,

Liebertz J.,

Bohatý L.

Publication year - 2009

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.200900179

Subject(s) - melilite , tetragonal crystal system , analytical chemistry (journal) , germanate , refractive index , phase (matter) , chemistry , materials science , crystal structure , mineralogy , crystallography , doping , optoelectronics , organic chemistry , chromatography , metallurgy , spinel

Refractive indices and their dispersion in the wavelength range from 365 nm to 2325 nm and transmission ranges of the tetragonal melilite‐type germanates Sr 2 MgGe 2 O 7 , Sr 2 ZnGe 2 O 7 and Ba 2 ZnGe 2 O 7 were determined. The uniaxial positive crystals Sr 2 MgGe 2 O 7 and Ba 2 ZnGe 2 O 7 both offer the possibility for phase matched second harmonic generation, a detailed analysis of phase matching conditions is given. The refractive indices of Sr 2 ZnGe 2 O 7 show an isoindex (isotropic) point at 467 nm. The investigation was performed on Czochralski grown large single crystals. The crystal structure of all three germanates were determined by means of X ‐ray diffraction. The results corroborate unmodulated melilite‐type structures at room temperature. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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