TY  - JOUR
AU  - Romet, I.
AU  - Tichy-Rács, Éva Ilona
AU  - Lengyel, Krisztián
AU  - Feldbach, E.
AU  - Kovács, László
AU  - Corradi, Gábor
AU  - Chernenko, K.
AU  - Kirm, M.
AU  - Spassky, D.
AU  - Nagirnyi, V.
TI  - Interconfigurational d-f luminescence of Pr3+ ions in praseodymium doped Li6Y(BO3)3 single crystals
JF  - JOURNAL OF LUMINESCENCE
J2  - J LUMIN
VL  - 265
PY  - 2024
PG  - 9
SN  - 0022-2313
DO  - 10.1016/j.jlumin.2023.120216
UR  - https://m2.mtmt.hu/api/publication/34167219
ID  - 34167219
N1  - Export Date: 07 March 2024; CODEN: JLUMA
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Solarz, P.
AU  - Sobczyk, M.
AU  - Beregi, Elena
AU  - Lisiecki, R.
AU  - Lengyel, Krisztián
AU  - Kovács, László
AU  - Ryba-Romanowski, W.
TI  - VIS-VUV spectroscopy of heavily Tb and Eu doped gadolinium aluminum borate (GAB) crystal
JF  - JOURNAL OF LUMINESCENCE
J2  - J LUMIN
VL  - 257
PY  - 2023
PG  - 10
SN  - 0022-2313
DO  - 10.1016/j.jlumin.2023.119717
UR  - https://m2.mtmt.hu/api/publication/33611773
ID  - 33611773
N1  - Export Date: 08 March 2024; CODEN: JLUMA
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Mandula, Gábor
AU  - Kis, Zsolt
AU  - Lengyel, Krisztián
AU  - Kovács, László
AU  - Tichy-Rács, Éva Ilona
TI  - Saturation Spectroscopic Studies on Yb3+ and Er3+ Ions in Li6Y(BO3)(3) Single Crystals
JF  - CRYSTALS
J2  - CRYSTALS
VL  - 12
PY  - 2022
IS  - 8
PG  - 12
SN  - 2073-4352
DO  - 10.3390/cryst12081151
UR  - https://m2.mtmt.hu/api/publication/33079014
ID  - 33079014
AB  - The results of a series of pump-probe spectral hole-burning experiments are presented on Yb3+- or Er3+-doped Li6Y(BO3)(3) (LYB) single crystals in the temperature range of 2-14 K and 9-28 K, respectively. The spectral hole has a complex structure for Yb3+ with superposed narrow and broad bands, while a single absorption hole has been observed for Er3+. Population relaxation times (T-1) at about 850 +/- 60 mu s and 1010 +/- 50 mu s and dipole relaxation times (T-2) with values of 1100 +/- 120 ns and 14.2 +/- 0.3 ns have been obtained for the two components measured for the Yb3+:F-2(7/2)-F-2(5/2) transition. T-1 = 402 +/- 8 mu s and T-2 = 11.9 +/- 0.2 ns values have been found for the Er3+:I-4(15/2)-I-4(11/2) excitation. The spectral diffusion rate at about 1 and 5 MHz/ms has been determined for the narrow and broad spectral line in Yb3+-doped crystal, respectively. The temperature dependence of the spectral hole halfwidth has also been investigated.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Xia, KW
AU  - Sardi, F
AU  - Sauerzapf, C
AU  - Kornher, T
AU  - Becker, HW
AU  - Kis, Zsolt
AU  - Kovács, László
AU  - Dertli, D
AU  - Foglszinger, J
AU  - Kolesov, R
AU  - Wrachtrup, J
TI  - Tunable microcavities coupled to rare-earth quantum emitters
JF  - OPTICA
J2  - OPTICA
VL  - 9
PY  - 2022
IS  - 4
SP  - 445
EP  - 450
PG  - 6
SN  - 2334-2536
DO  - 10.1364/OPTICA.453527
UR  - https://m2.mtmt.hu/api/publication/32836485
ID  - 32836485
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Kocsor, Laura
AU  - Kovács, László
AU  - Bencs, László
AU  - Kolonits, Tamás
AU  - Lengyel, Krisztián
AU  - Bazsó, Gábor
AU  - Kis, Zsolt
AU  - Péter, László
TI  - Lithium oxide loss of lithium niobate nanocrystals during high-energy ball-milling
JF  - JOURNAL OF ALLOYS AND COMPOUNDS
J2  - J ALLOY COMPD
VL  - 909
PY  - 2022
PG  - 10
SN  - 0925-8388
DO  - 10.1016/j.jallcom.2022.164713
UR  - https://m2.mtmt.hu/api/publication/32778844
ID  - 32778844
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Kovács, László
AU  - Corradi, Gábor
TI  - New trends in lithium niobate: From bulk to nanocrystals
JF  - CRYSTALS
J2  - CRYSTALS
VL  - 11
PY  - 2021
IS  - 11
PG  - 4
SN  - 2073-4352
DO  - 10.3390/cryst11111356
UR  - https://m2.mtmt.hu/api/publication/32499988
ID  - 32499988
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Corradi, Gábor
AU  - Kovács, László
TI  - 'Horror Vacui' in the Oxygen Sublattice of Lithium Niobate Made Affordable by Cationic Flexibility
JF  - CRYSTALS
J2  - CRYSTALS
VL  - 11
PY  - 2021
IS  - 7
PG  - 14
SN  - 2073-4352
DO  - 10.3390/cryst11070764
UR  - https://m2.mtmt.hu/api/publication/32119920
ID  - 32119920
AB  - The present review is intended for a broader audience interested in the resolution of the several decades-long controversy on the possible role of oxygen-vacancy defects in LiNbO3. Confronting ideas of a selected series of papers from classical experiments to brand new large-scale calculations, a unified interpretation of the defect generation and annealing mechanisms governing processes during thermo- and mechanochemical treatments and irradiations of various types is presented. The dominant role of as-grown and freshly generated Nb antisite defects as traps for small polarons and bipolarons is demonstrated, while mobile lithium vacancies, also acting as hole traps, are shown to provide flexible charge compensation needed for stability. The close relationship between LiNbO3 and the Li battery materials LiNb3O8 and Li3NbO4 is pointed out. The oxygen sublattice of the bulk plays a much more passive role, whereas oxygen loss and Li2O segregation take place in external or internal surface layers of a few nanometers.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Tichy-Rács, Éva Ilona
AU  - Romet, I.
AU  - Kovács, László
AU  - Lengyel, Krisztián
AU  - Corradi, Gábor
AU  - Nagirnyi, V.
TI  - Optical spectroscopy of Li6Y(BO3)3 single crystals doped with dysprosium
JF  - CRYSTALS
J2  - CRYSTALS
VL  - 11
PY  - 2021
IS  - 5
PG  - 11
SN  - 2073-4352
DO  - 10.3390/cryst11050503
UR  - https://m2.mtmt.hu/api/publication/32023651
ID  - 32023651
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Lengyel, Krisztián
AU  - Tichy-Rács, Éva Ilona
AU  - Timpmann, K.
AU  - Vielhauer, S.
AU  - Romet, I.
AU  - Kovács, László
AU  - Corradi, Gábor
AU  - Butkus, R.
AU  - Vengris, M.
AU  - Grigonis, R.
AU  - Sirutkaitis, V.
AU  - Sildos, I.
AU  - Kiisk, V.
AU  - Puust, L.
AU  - Nagirnyi, V.
TI  - Cooperative luminescence of Yb3+ ion pairs in Li6Y(BO3)3:Yb single crystals
JF  - JOURNAL OF LUMINESCENCE
J2  - J LUMIN
VL  - 230
PY  - 2021
PG  - 9
SN  - 0022-2313
DO  - 10.1016/j.jlumin.2020.117732
UR  - https://m2.mtmt.hu/api/publication/31661698
ID  - 31661698
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Laczai, Nikoletta
AU  - Kovács, László
AU  - Kocsor, Laura
AU  - Bencs, László
TI  - Influence of LiF additive and cerium doping on photoluminescence properties of polycrystalline YSO and LYSO
JF  - MATERIALS RESEARCH BULLETIN
J2  - MATER RES BULL
VL  - 133
PY  - 2021
PG  - 8
SN  - 0025-5408
DO  - 10.1016/j.materresbull.2020.111018
UR  - https://m2.mtmt.hu/api/publication/31408579
ID  - 31408579
LA  - English
DB  - MTMT
ER  -