ISSN:
1432-0630
Keywords:
PACS42.70; 42.70.Nq; 78.20
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract. Ternary halides are potential materials for nonlinear optical applications in the mid infrared because of their transparency. We discuss physical, chemical and crystallographic aspects and develop a concept for preparing nonlinear optical halides. Based on the bond-charge model optical hyperpolarizabilities are calculated for more than one hundred A-X bonds where X = Cl, Br or I. The calculations are tested as far as possible by a comparison with experimental data. The tests show that the listed hyperpolarizabilities are a sound basis for the calculation of nonlinear optical susceptibilities in halides. A list of cations is given which form bonds with large hyperpolarizabilities and which show the tendency to form acentric structures. Phase diagrams of the two selected systems TlI-AsI $_3$ and TlI-BiI $_3$ are studied experimentally. Large single crystals of the new acentric compound Tl $_7$ Bi $_3$ I $_{16}$ and of Tl $_3$ PbCl $_5$ are prepared. In both crystals twinning prevents an effective SHG effect.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01579747
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