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Developement of new non-linear optical solids: from the IR to the UV

Ziel

The present proposal pursues the following scientific and technological goals:

(1) determination of thermodynamic and kinetic parameters for growth of high quality single crystals of borates (REM3(BO3)4 with M = Al,Sc; Ca4REO(BO3)3), LiB3O5-CsB3O5 system, AgGaSe2/ZnGeP2 and their solid solutions as technologically promising compounds for NLO devices from the IR to the UV;
(2) crystal growth of the above materials by both spontaneous nucleation and top-seeded solution growth (TSSG) from fluxed melts and by the Czochralski and Bridgman tecniques from congruent melts;
(3) spectroscopic measurements of optical absorption, luminescence and excited state life-times, efficiency of optical harmonics generation and parametric transformation of laser pulse frequency by the grown crystals;
(4) characterization of magnetic, electrical and thermomechanical properties of as-grown crystals with respect to their functional performance in devices;
(5) development of criteria allowing to guide the search for more efficient ways to the synthesis of predicted structures, based on the obtained correlations between the composition of grown crystals and their physical and structural characteristics.

An accurate determination and/or a refinement of the temperature-concentration regions of RE(Al,Sc)3(BO3)4, Ca4REO(BO3)3, (Li,Cs)B3O5 crystallization will be made. Borate crystals will be grown by spontaneous crystallization, the TSSG technique and the Czochralski method for examination of the effect of growth conditions on their composition, structure and physical properties. AgGaSe2/ZnGeP2 crystals and their solid solutions will be grown by the Bridgman method. Detailed spectroscopic and nonlinear optical measurements will be carried out. Electrical and magnetic properties will also be examined for all grown crystals. A comparison of the composition, optical homogeneity, structural characteristics and physical properties will be made for all crystals grown under different conditions. The main criteria for more efficient ways of obtaining new materials with controlled and desirable composition, structure and properties will be formulated. The direct results planned to be achieved by the project conclusion include the definition of optimal conditions for growth of high quality NLO single crystals for science and modern technology. On the whole, achievement of the stated objectives will fill the gap in current understanding of the composition-structure-properties relationships in the NLO crystals.

The combined skills and expertise available within the seven groups (three groups from INTAS member countries and four NIS groups) will enable significant progress to be made in this area. The results of the proposed research will be published jointly in scientific journals and presented at international conferences.

Aufforderung zur Vorschlagseinreichung

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Finanzierungsplan

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Koordinator

Hebrew University of Jerusalem
EU-Beitrag
Keine Daten
Adresse
Givat Ram Campus
91904 Jerusalem
Israel

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Beteiligte (6)