Obiettivo 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. Programma(i) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Argomento(i) 1B - Condensed Matter, Optics and Plasma Physics INTAS - INTAS Invito a presentare proposte Data not available Meccanismo di finanziamento Data not available Coordinatore Hebrew University of Jerusalem Contributo UE Nessun dato Indirizzo Givat Ram Campus 91904 Jerusalem Israele Mostra sulla mappa Costo totale Nessun dato Partecipanti (6) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto BNM-LPTF, Observatoire de Paris Francia Contributo UE Nessun dato Indirizzo 61 avenue de l'Observatoire 75014 Paris Mostra sulla mappa Costo totale Nessun dato Institute for Single Crystals Ucraina Contributo UE Nessun dato Indirizzo 60 Lenin Ave 310001 Kharkov Mostra sulla mappa Costo totale Nessun dato Institute of Physics Bielorussia Contributo UE Nessun dato Indirizzo 70 Skorina Prospect 220072 Minsk Mostra sulla mappa Costo totale Nessun dato Institute of Physics of Solids and Semiconductors Bielorussia Contributo UE Nessun dato Indirizzo 17 P. Brovka 220072 Minsk Mostra sulla mappa Costo totale Nessun dato M.V. Lomonosov Moscow State University Russia Contributo UE Nessun dato Indirizzo Vorobjevy Gory 119899 Moscow Mostra sulla mappa Costo totale Nessun dato University of Strathclyde Regno Unito Contributo UE Nessun dato Indirizzo Colville Building, North Portland Street G1 1XN Glasgow Mostra sulla mappa Costo totale Nessun dato