• 2104 Citations
  • 25 h-Index
1982 …2021

Research output per year

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Research Output

2005

Decay of photorefractive gratings in LiNb O3: Fe by neutron irradiation

Mandula, G., Rupp, R. A., Balaskó, M. & Kovács, L., Apr 4 2005, In : Applied Physics Letters. 86, 14, p. 1-3 3 p., 141107.

Research output: Contribution to journalArticle

7 Citations (Scopus)

FTIR absorption study of hydroxyl ions in KHo(WO4)2 single crystals

Kovács, L., Borowiec, M. T., Majchrowski, A., Baraldi, A. & Capelletti, R., Apr 1 2005, In : Crystal Research and Technology. 40, 4-5, p. 444-448 5 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Hydroxyl ions in acousto-optic Pb5(GeO4)(VO 4)2 and Bi2(MoO4)3 single crystals

Kovács, L., Péter, Á., Gospodinov, M. & Capelletti, R., Nov 7 2005, In : Physica Status Solidi C: Conferences. 2, 1, p. 689-692 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Optical topographic technique to material characterization of photorefractive crystals

Bugaychuk, S., Mandula, G., Kovács, L. & Rupp, R. A., Dec 1 2005, In : Proceedings of SPIE - The International Society for Optical Engineering. 6023, 60230J.

Research output: Contribution to journalConference article

Threshold concentration of MgO in near-stoichiometric LiNbO3 crystals

Péter, Á., Polgár, K., Kovács, L. & Lengyel, K., Oct 15 2005, In : Journal of Crystal Growth. 284, 1-2, p. 149-155 7 p.

Research output: Contribution to journalArticle

58 Citations (Scopus)
28 Citations (Scopus)
2004

Composition dependence of the OH-stretch-mode spectrum in lithium tantalate

Bäumer, C., David, C., Betzler, K., Hesse, H., Lengyel, K., Kovács, L. & Wöhlecke, M., Mar 1 2004, In : Physica Status Solidi (A) Applied Research. 201, 4, p. R13-R16

Research output: Contribution to journalArticle

18 Citations (Scopus)

Effect of temperature on luminescence and VUV to visible conversion in the YAl3(BO3)4:Dy3+ (YAB:Dy) crystal

Dominiak-Dzik, G., Ryba-Romanowski, W., Kovács, L. & Beregi, E., Aug 1 2004, In : Radiation Measurements. 38, 4-6, p. 557-561 5 p.

Research output: Contribution to journalArticle

31 Citations (Scopus)

Gap levels of Ti3+ on Nb or Li sites in LiNbO 3:(Mg):Ti crystals and their effect on charge transfer processes

Corradi, G., Meyer, M., Kovács, L. & Polgár, K., Mar 1 2004, In : Applied Physics B: Lasers and Optics. 78, 5, p. 607-614 8 p.

Research output: Contribution to journalArticle

14 Citations (Scopus)

Structure of the OH- stretching vibrational band in Sr xBa1-xNb2O6

David, C., Tunyagi, A., Ulex, M., Wöhlecke, M., Betzler, K., Lengyel, K. & Kovács, L., May 15 2004, In : Journal of Applied Physics. 95, 10, p. 5522-5526 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2003

Activation energy of proton migration in Mn- and Fe-doped lithium niobate obtained by holographic methods

Mandula, G., Ellabban, M. A., Rupp, R. A., Fally, M., Hartmann, E., Kovács, L. & Polgár, K., Dec 1 2003, In : Radiation Effects and Defects in Solids. 158, 1-6, p. 173-179 7 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Dysprosium-doped YAl3(BO3)4 (YAB) crystals: An investigation of radiative and non-radiative processes

Dominiak-Dzik, G., Solarz, P., Ryba-Romanowski, W., Beregi, E. & Kovács, L., Sep 22 2003, In : Journal of Alloys and Compounds. 359, 1-2, p. 51-58 8 p.

Research output: Contribution to journalArticle

63 Citations (Scopus)

Effect of melt composition on the electrical conductivity and IR absorption of CsLiB6O10 crystals

Hartmann, E., Péter, Á., Lengyel, K. & Kovács, L., 2003, In : Crystal Research and Technology. 38, 3-5, p. 331-335 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Growth of PZN crystals with improved optical quality using the BSFT technique

Erdei, S., Schlecht, R. G. & Kovács, L., May 1 2003, In : IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 50, 5, p. 481-486 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Hydroxyl ion absorption in LaGaO3 single crystals

Kovács, L., Lengyel, K., Baraldi, A., Capelletti, R., Berkowski, M. & Ryba-Romanowski, W., May 1 2003, In : Journal of Physics and Chemistry of Solids. 64, 5, p. 741-747 7 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

IR absorption spectroscopy of water in CsLiB6O10 crystals

Kovács, L., Lengyel, K., Péter, Á., Polgár, K. & Beran, A., Dec 2003, In : Optical Materials. 24, 3, p. 457-463 7 p.

Research output: Contribution to journalArticle

25 Citations (Scopus)

Nonuniform dynamic gratings in photorefractive media with nonlocal response

Bugaychuk, S., Kovács, L., Mandula, G., Polgár, K. & Rupp, R. A., Apr 2003, In : Physical Review E - Statistical, Nonlinear, and Soft Matter Physics. 67, 4 2, p. 466031-466038 8 p., 046603.

Research output: Contribution to journalArticle

18 Citations (Scopus)

Optical and magnetic spectroscopy of rare-earth-doped yttrium aluminium borate (YAl3(BO3)4) single crystals

Watterich, A., Aleshkevych, P., Borowiec, M. T., Zayarnyuk, T., Szymczak, H., Beregi, E. & Kovács, L., May 21 2003, In : Journal of Physics Condensed Matter. 15, 19, p. 3323-3331 9 p.

Research output: Contribution to journalArticle

26 Citations (Scopus)

Soliton-like dynamic gratings in photorefractive Four-wave mixing

Bugaychuk, S., Kovács, L., Mandula, G., Polgár, K. & Rupp, R. A., Jan 1 2003, 2003 European Quantum Electronics Conference, EQEC 2003. Institute of Electrical and Electronics Engineers Inc., 1 p. 1314071. (2003 European Quantum Electronics Conference, EQEC 2003).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wave-mixing solitons in bulk photorefractive crystals

Bugaychuk, S., Kovács, L., Mandula, G., Polgár, K. & Rupp, R. A., Dec 1 2003, In : Proceedings of SPIE - The International Society for Optical Engineering. 5257, p. 201-205 5 p.

Research output: Contribution to journalConference article

2002

Activation energy of thermal fixing in LINbO3: A comparative study

Ellabban, M. A., Mandula, G., Rupp, R. A., Fally, M., Hartmann, E., Kovács, L. & Polgár, K., Jan 1 2002, In : Proceedings of SPIE - The International Society for Optical Engineering. 4607, p. 313-321 9 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Charge states and optical transitions of vanadium in Bi4Ge3O12 identified by MCD and ODMR

Briat, B., Watterich, A., Ramaz, F., Kovács, L., Forget, B. C. & Romanov, N., Jan 1 2002, In : Optical Materials. 20, 4, p. 253-262 10 p.

Research output: Contribution to journalArticle

25 Citations (Scopus)

Excited-state relaxation dynamics of Cr3+ in YAl3(BO3)4

Dominiak-Dzik, G., Ryba-Romanowski, W., Grinberg, M., Beregi, E. & Kovacs, L., May 27 2002, In : Journal of Physics Condensed Matter. 14, 20, p. 5229-5237 9 p.

Research output: Contribution to journalArticle

24 Citations (Scopus)

Multimode transitions of the tetrahedral MO4 units (M = Si,Ge,Ti) in sillenite single crystals

Capelletti, R., Beneventi, P., Kovács, L. & Fowler, W. B., Nov 1 2002, In : Physical Review B - Condensed Matter and Materials Physics. 66, 17, p. 1743071-17430712 15687642 p., 174307.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Optical properties and laser potential of dysprosium doped YAl 3(BO3)4 (YAB) crystal

Dominiak-Dzik, G., Solarz, P., Ryba-Romanowski, W., Beregi, E., Hartmann, E. & Kovács, L., Dec 1 2002, In : Radiation Effects and Defects in Solids. 157, 6-12, p. 1161-1165 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Stretching potential and equilibrium length of the OH bond in solids

Szalay, V., Kovács, L., Wöhlecke, M. & Libowitzky, E., Mar 5 2002, In : Chemical Physics Letters. 354, 1-2, p. 56-61 6 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)

Wave-mixing solitons in ferroelectric crystals

Bugaychuk, S., Kovács, L., Mandula, G., Polgár, K. & Rupp, R. A., Dec 1 2002, In : Radiation Effects and Defects in Solids. 157, 6-12, p. 995-1001 7 p.

Research output: Contribution to journalArticle

2001

Electron spin-resonance (ESR) and electron-nuclear double-resonance (ENDOR) study of the self-trapped hole in ZnWO4 single crystals

Watterich, A., Kovács, L., Würz, R., Schön, F., Hofstaetter, A. & Scharmann, A., Feb 19 2001, In : Journal of Physics Condensed Matter. 13, 7, p. 1595-1607 13 p.

Research output: Contribution to journalArticle

27 Citations (Scopus)

FTIR spectroscopy of OH-induced defects in KTP single crystals

Baraldi, A., Capelletti, R., Kovács, L. & Mora, C., Jan 1 2001, In : Radiation Effects and Defects in Solids. 155, 1-4, p. 355-359 5 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Holographic scattering as a technique to determine the activation energy for thermal fixing in photorefractive materials

Ellabban, M. A., Mandula, G., Fally, M., Rupp, R. A. & Kovács, L., Feb 5 2001, In : Applied Physics Letters. 78, 6, p. 844-846 3 p.

Research output: Contribution to journalArticle

23 Citations (Scopus)

Kinetics of OH- ions in nearly stoichiometric LiNbO3 crystals

Lengyel, K., Kovács, L., Mandula, G. & Rupp, R., Dec 1 2001, In : Ferroelectrics. 257, 1, p. 255-262 8 p.

Research output: Contribution to journalConference article

14 Citations (Scopus)

OH- ions in oxide crystals

Wöhlecke, M. & Kovács, L., Jan 1 2001, In : Critical Reviews in Solid State and Materials Sciences. 26, 1, p. 1-86 86 p.

Research output: Contribution to journalArticle

66 Citations (Scopus)
2000

Comparative study of bismuth tellurites by infrared absorption spectroscopy

Szaller, Z., Kovács, L. & Pöppl, L., Jan 1 2000, In : Journal of Solid State Chemistry. 152, 2, p. 392-396 5 p.

Research output: Contribution to journalArticle

20 Citations (Scopus)

Growth of PZN crystals with improved optical quality using the BSFT technique

Erdei, S., Schlecht, R. G. & Kovács, L., Dec 1 2000, p. 541-544. 4 p.

Research output: Contribution to conferencePaper

21 Citations (Scopus)

Thermal fixing of holographic gratings in nearly stoichiometric LiNbO3 crystals

Mandula, G., Lengyel, K., Kovács, L., Ellabban, M. A., Rupp, R. A. & Fally, M., Aug 10 2000, In : Proceedings of SPIE - The International Society for Optical Engineering. 4412, 1, p. 226-230 5 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
1999

Electronic and vibrational levels of the photochromic Mn in sillenites

Beneventi, P., Briat, B., Capelletti, R., Gospodinov, M., Kovács, L., Mazzocchi, E. & Ruffini, A., Jan 1 1999, In : Radiation Effects and Defects in Solids. 150, 1-4, p. 243-247 5 p.

Research output: Contribution to journalConference article

2 Citations (Scopus)

FTIR spectroscopy of borate crystals

Kovacs, L., Beregi, E., Polgar, K. & Peter, A., Jan 1 1999, In : Proceedings of SPIE - The International Society for Optical Engineering. 3724, p. 256-259 4 p.

Research output: Contribution to journalConference article

9 Citations (Scopus)

Fundamental and overtone spectra of the OH and OD stretch mode in congruent and stoichiometric LiTaO3

Wierschem, M., Bäumer, C., Jovanović, A., Wöhlecke, M., Kapphan, S. & Kovács, L., Oct 1999, In : Physica Status Solidi (B) Basic Research. 215, 2, p. r7-r8

Research output: Contribution to journalArticle

8 Citations (Scopus)

OH- vibrational band in YVO4 crystals

Kovács, L., Erdei, S. & Capelletti, R., Jun 8 1999, In : Solid State Communications. 111, 2, p. 95-99 5 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Optical absorption edge and some shallow donor levels in LiNbO3 systems

Corradi, G., Kovacs, L. & Zaritskii, I. M., Jan 1 1999, In : Radiation Effects and Defects in Solids. 150, 1-4, p. 211-219 9 p.

Research output: Contribution to journalConference article

Raman and IR spectroscopy investigations of double tungstates

Borowiec, M. T., Szymczak, H., Zaleski, M., Kaczor, P., Adamowicz, L., Strzeszewski, J., Watterich, A. & Kovacs, L., 1999, In : Proceedings of SPIE - The International Society for Optical Engineering. 3724, p. 288-291 4 p.

Research output: Contribution to journalConference article

1 Citation (Scopus)
1997

Composition dependence of the ultraviolet absorption edge in lithium niobate

Kovács, L., Ruschhaupt, G., Polgár, K., Corradi, G. & Wöhlecke, M., May 26 1997, In : Applied Physics Letters. 70, 21, p. 2801-2803 3 p.

Research output: Contribution to journalArticle

155 Citations (Scopus)

Ftir spectroscopy to monitor impurities and impurity-interactions in sillenite crystals

Capellctti, R., Beneventi, P., László, Kovács & Ruffini, A., Dec 1 1997, In : Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics. 101, 9, p. 1282-1285 4 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Growth of stoichiometric LiNbO3 single crystals by top seeded solution growth method

Polgár, K., Péter, Á., Kovács, L., Corradi, G. & Szaller, Z., Jun 1997, In : Journal of Crystal Growth. 177, 3-4, p. 211-216 6 p.

Research output: Contribution to journalArticle

202 Citations (Scopus)

Low temperature three-dimensional thermoluminescence spectra of undoped YVO4 single crystals grown by different techniques

Erdei, S., Kovács, L., Peto, Á., Vandlik, J., Townsend, P. D. & Ainger, F. W., Sep 1 1997, In : Journal of Applied Physics. 82, 5, p. 2567-2571 5 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Removal of iron, chromium and sodium impurities from zinc tungstate (ZnWO4)

Bencs, L. F., Raksányi, K., Szakács, O., Kovács, L., Watterich, A. & Péter, Á., Nov 1997, In : Journal of Crystal Growth. 181, 4, p. 455-458 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Vibrational spectroscopy of impurities in sillenite crystals

Bandini, E., Beneventi, P., Capelletti, R., Gospodinov, M. & Kovács, L., Jan 1 1997, In : Materials Science Forum. 239-241, p. 493-496 4 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
1996

High temperature 3-D thermoluminescence spectra of Eu3+ activated YVO4 - YPO4 powder systems reacted by hydrolyzed colloid reaction (HCR) technique

Erdei, S., Kovács, L., Martini, M., Meinardi, F., Ainger, F. W. & White, W. B., Apr 1996, In : Journal of Luminescence. 68, 1, p. 27-34 8 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Point defects identified by spectroscopic methods in ZnWO4 single crystals

Watterich, A., Kovács, L., Gilliam, O. R. & Kappers, L. A., Jan 1 1996, In : Radiation protection dosimetry. 65, 1-4, p. 97-100 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)