ANNUAL REPORT - MTA SzFKI

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groups of the Li 2 B 4 O 7 lattice. The results are helpful for understanding the radiation induced charge transfer processes. Design and fabrication of diffractive optical elements and waveguides by ion implantation. –– Slab waveguides have been designed and fabricated in erbium doped tellurite glass samples, implanting 1.5 MeV N + ions with doses in the 10 16 – 10 17 ions/cm 2 range. The waveguides were studied using the following methods: M-line test, to check the functionality of the samples, interference contrast microscopy, to determine the total modulation of the refractive index in the structures, cathode luminescence (CL), electron diffraction pattern (EDX) analysis, and spectroscopic ellipsometry, to determine the indepth refracive index profile of the waveguides. The results showed that the waveguides were of barrier-type, i.e. the ion implantation produced a negative refractive index change around the maximum of the distribution of the implanted ions. History of science. –– The collaboration of the Crystal Physics Department and the Crystal Physics Ggroup at the Budapest Technical University was analyzed. E-Mail: István Bányász Gábor Corradi Ivett Hajdara Ervin Hartmann László Kovács Krisztián Lengyel Gábor Mandula László Malicskó Andrea Watterich banyasz@szfki.hu corradi@szfki.hu hajdara@szfki.hu hartmann@szfki.hu lkovacs@szfki.hu klengyel@ szfki.hu mandula@szfki.hu malicsko@szfki.hu watter@szfki.hu Grants and international cooperations OTKA T 047265 Photo- and neutronrefractive materials and phenomena (L. Kovács, 2004-2008) OTKA K 60086 Spectroscopic studies of photon-induced electron transport for data handling and medical applications (G. Corradi, 2006-2009) OTKA K 68688 Fabrication of waveguides and diffractive optical elements via ion implantation (T. Lohner, <strong>MTA</strong> Research Institute for Technical Physics and Materials Science, contributors I. Bányász and A. Watterich, 2007 – 2010) TéT Italian-Hungarian Intergovernmental S & T Cooperation (I-46/03): Growth and FTIR spectroscopy of optical crystals (L. Kovács, 2004-2007) TéT Italian-Hungarian Intergovernmental S & T Cooperation (I-15/03): Fabrication of active and passive integrated optical elements and devices by ion beam implantation (I. Bányász, 2004-2007) HAS – Polish Academy of Sciences joint project: Structure of real crystals (A. Watterich, 2005-2007) HAS – Estonian Academy of Sciences joint project: Luminescence and magnetic resonance study of pure and doped wide-gap borate and niobate crystals (G. Corradi, 2007-2009) HAS – Bulgarian Academy of Sciences joint project: Growth and spectroscopic characterization of oxide crystals for optical application (L. Kovács, 2007-2009) 82
HAS – CNR joint project: Growth and spectroscopic investigation of self-frequencydoubling laser crystals (I. Földvári, contributor L. Kovács, 2007- 2009) HAS – Polish Academy of Sciences joint project: Growth and spectroscopic investigation of rare-earth-doped nonlinear optical crystals (I. Földvári, contributor K. Lengyel, 2005-2007) Long term visitor ⎯ Dr Margherita Mazzera, Department of Physics, University of Parma, Italy, 1-31 October 2007 (L. Kovács) Publications Articles S.1. Araujo * RM, Amaral * JB, Jackson * RA, Valerio * MG, Lengyel K, Kovács L; Computer modelling of substitutional defects and optical properties of the ferroelectric and paraelectric phases of LiNbO 3 ; phys stat sol (c); 4, 1201-1204, 2007 S.2. S.3. S.4. S.5. S.6. S.7. Hajdara I, Lengyel K, Dravecz G, Kovács L, Péter Á, Polgár K; Spectroscopic methods for the determination of the composition of potassium lithium niobate crystals; phys stat sol (c); 4, 1321-1324, 2007 Corradi G, Watterich A, Polgár K, Nagirnyi * V, Hofstaetter * A, Rakitina * LG, Meyer * M; EPR of Cu 2+ in lithium tetraborate single crystals; phys stat sol (c); 4, 1276-1279, 2007 Nagirnyi * V, Kotlov * A, Corradi G, Watterich A, Kirm * M; Electronic transitions in Li 2 B 4 O 7 :Cu single crystals; phys stat sol (c); 4, 885-888, 2007 Lengyel K, Kovács L, Péter Á, Polgár K, Corradi G, Bourson * P; The effect of Mg doping on the Raman spectra of LiNbO 3 crystals; phys stat sol (c); 4, 847-850, 2007 Kovács L, Péter Á, Ivleva * LI, Baraldi * A, Capelletti * R; Hydroxil ions in scheelite type molybdates and tungstates; phys stat sol (c); 4, 856-859, 2007 Mandula G, Ellabban * MA, Fally * M; A method to determine H + concentration in dehydrated iron doped lithium niobate using photorefractive beam fanning effect; Ferroelectrics; 352, 118-124, 2007 S.8. Gruber * JB, Sardar * DK, Yow * RM, Valiev * UV, Mukhammadiev * AK, Sokolov * VY, Amin * I, Lengyel K, Kachur * IS, Piryatinska * VG, Zandi * B; Analysis of the optical and magneto-optical spectra of Tb 3 Ga 5 O 12 ; J Appl Phys; 101, 023108/1-14, 2007 S.9. Araujo * RM, Lengyel K, Jackson * RA, Kovács L, Valerio * MEG; A computational study of intrinsic and extrinsic defects in LiNbO 3 ; J Phys: Condens Matter; 19, 046211/1-10, 2007 83
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ANNUAL REPORT 2007 RESEARCH INSTITU
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Dear Reader, It is my pleasure to h
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Key figures Permanent staff of the
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A. STRONGLY CORRELATED SYSTEMS J. S
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presented detailed study should hel
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B. COMPLEX SYSTEMS F. Iglói, R. Ju
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B.3. B.4. B.5. B.6. B.7. B.8. B.9.
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the α2 reconstruction increases on
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C.2. C.3. Kádas K, Vitos L, Johans
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C.27. Ropo * M, Kokko * K, Punkkine
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I 25 4 3 Fig. 2. Average intensity
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See also H.6. and nanostructured Pd
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Ab initio structure solution. — I
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ESA PECS 98021 Phase field modeling
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Conference proceedings E.17. Oszlá
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Fig. 1. ns-EC to s-EC transition in
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Page 42 and 43: I. METALLURGY AND MAGNETISM L.K. Va
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Page 56 and 57: László Temleitner temla@szfki.hu
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Page 62 and 63: M. LASER PHYSICS K. Rózsa, G. Bán
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Page 76 and 77: E-Mail: Kárpát Ferencz optilab@t-
Page 78 and 79: y optical microscopy. While in Y 2
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Page 92 and 93: EDUCATION Graduate and postgraduate
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Page 100 and 101: CONFERENCES ⎯ Electrochemistry se
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