TY - JOUR AU - Dombi, Péter AU - Kienberger, R. TI - A NOBEL PRIZE FOR ATTOSECOND PHYSICS BASED ON EXTREME NONLINEAR OPTICS JF - EUROPHYSICS NEWS J2 - EUROPHYS NEWS VL - 55 PY - 2024 IS - 1 SP - 16 EP - 21 PG - 6 SN - 0531-7479 DO - 10.1051/epn/2024106 UR - https://m2.mtmt.hu/api/publication/34722308 ID - 34722308 N1 - Export Date: 07 March 2024 LA - English DB - MTMT ER - TY - JOUR AU - Komatsu, K. AU - Pápa, Zsuzsanna AU - Jauk, T. AU - Bernecker, F. AU - Tóth, L. AU - Lackner, F. AU - Ernst, W.E. AU - Ditlbacher, H. AU - Krenn, J.R. AU - Ossiander, M. AU - Dombi, Péter AU - Schultze, M. TI - Few-Cycle Surface Plasmon Polaritons JF - NANO LETTERS J2 - NANO LETT VL - 24 PY - 2024 IS - 8 SP - 2637 EP - 2642 PG - 6 SN - 1530-6984 DO - 10.1021/acs.nanolett.3c04991 UR - https://m2.mtmt.hu/api/publication/34693217 ID - 34693217 LA - English DB - MTMT ER - TY - JOUR AU - Benabdelghani, Imene AU - Tóth, György AU - Krizsán, Gergő AU - Bazsó, Gábor AU - Szaller, Zsuzsanna AU - Mbithi, Nelson AU - Rácz, Péter AU - Dombi, Péter AU - Polónyi, Gyula AU - Hebling, János TI - Three-photon and four-photon absorption in lithium niobate measured by the Z-scan technique JF - OPTICS EXPRESS J2 - OPT EXPRESS VL - 32 PY - 2024 IS - 5 SP - 7030 EP - 7043 PG - 14 SN - 1094-4087 DO - 10.1364/OE.505995 UR - https://m2.mtmt.hu/api/publication/34596731 ID - 34596731 N1 - Szentágothai Research Centre, Ifjúság street 20, Pécs, 7624, Hungary University of Pécs, Ifjúság Street 6, Pécs, 7624, Hungary HUN-REN – PTE High Intensity Terahertz Research Group, Ifjúság Street 6, Pécs, 7624, Hungary Wigner Research Center for Physics, Institute for Solid State Physics and Optics, Budapest, H-1121, Hungary Garissa University, Garissa, Kenya Export Date: 29 April 2024 Correspondence Address: Hebling, J.; Szentágothai Research Centre, Ifjúság street 20, Hungary; email: hebling@fizika.ttk.pte.hu AB - Open-aperture Z-scan measurements have been carried out to investigate the three-photon (3 PA) and four-photon absorption (4 PA) coefficients at 800 nm and 1030 nm wavelengths, respectively in congruent and stoichiometric lithium niobate (cLN, sLN) with different concentrations of Mg doping. The laser pulse duration at the two wavelengths were 40 and 190 fs. The peak intensity inside the crystals varied between approximately 110 and 550 GW/cm 2 . The 3 PA and 4 PA coefficients were evaluated using a theoretical model and the results suggest that their minima are at or around the Mg doping level corresponding to the threshold for suppressing photo-refraction for both cLN and sLN. This result can be attributed to the contribution of crystal defects to the 3 PA and 4 PA processes. Furthermore, the 4 PA at 1030 nm exhibited greater nonlinear absorption than the 3 PA at 800 nm under the same intensity level. Possible reasons for this unexpected behavior are discussed. Overall, comparing the 3 PA and 4 PA values of these crystals will enable for selection of the optimum composition of LN crystal for efficient THz generation and for other nonlinear optical processes requiring high pump intensities. LA - English DB - MTMT ER - TY - JOUR AU - Bánhegyi, Balázs AU - Tóth, Lázár AU - Dombi, Péter AU - Budai, Judit AU - Hanus, Václav AU - Rácz, Péter AU - Pápa, Zsuzsanna TI - Controlling Plasmonic Field Enhancement via the Interference of Orthogonal Plasmonic Modes JF - PLASMONICS J2 - PLASMONICS PY - 2024 PG - 8 SN - 1557-1955 DO - 10.1007/s11468-024-02212-9 UR - https://m2.mtmt.hu/api/publication/34576933 ID - 34576933 AB - Optical nanoantennas concentrate light into their local fields. The field concentration property is governed by the plasmonic resonances and their interference. Here, we present a method for controllable local-field interferences in the hot spot of nanorods and experimentally demonstrate that the field enhancement can be tuned in a wide range. For this, we design nanoparticles with given phase relations between their plasmonic eigenmodes and at the same time tune the phase between the components of the external field by changing its polarization state to achieve in-phase excitation of the plasmon modes. Strong-field photoemission is applied to probe the field enhancement property of the nanorods employing femtosecond pulses of different polarization states. Our findings provide a new degree of freedom in plasmonic resonance tuning and may inspire diverse designs of local-field responses and expand the applications in nanoscale sensing, spectroscopy, and dynamically tunable devices. LA - English DB - MTMT ER - TY - JOUR AU - Dombi, Péter ED - Kroó, Norbert / Interviewed person TI - Interjú Kroó Norberttel JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 74 PY - 2024 IS - 1 SP - 24 EP - 26 PG - 3 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/34516670 ID - 34516670 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Dombi, Péter TI - Krausz Ferenc – magyar Nobel-díj az extrém nemlineáris optikáért JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 74 PY - 2024 IS - 1 SP - 16 EP - 19 PG - 4 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/34512834 ID - 34512834 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Dombi, Péter TI - Krausz Ferenc Nobel-díja és a kapcsolódó hazai kutatások JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 74 PY - 2024 IS - 1 SP - 1 EP - 1 PG - 1 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/34512550 ID - 34512550 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Bánhegyi, Balázs AU - Rácz, Péter AU - Dombi, Péter TI - Az atomok világának kapujában. Nobel-díj az attofizikáért [Krausz Ferenc] JF - TERMÉSZET VILÁGA J2 - TERMÉSZET VILÁGA VL - 154 PY - 2023 IS - 11 SP - 490 EP - 494 PG - 5 SN - 0040-3717 UR - https://m2.mtmt.hu/api/publication/34549160 ID - 34549160 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Varjú, Katalin AU - Dombi, Péter AU - Szabó, Gábor TI - Nobel-díj az attofizikáért JF - MAGYAR TUDOMÁNY J2 - MAGYAR TUDOMÁNY VL - 184 PY - 2023 IS - 12 SP - 1502 EP - 1506 PG - 5 SN - 0025-0325 DO - 10.1556/2065.184.2023.12.3 UR - https://m2.mtmt.hu/api/publication/34535545 ID - 34535545 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Dombi, Péter AU - Varjú, Katalin TI - Krausz Ferenc, az attofizika úttörője JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 73 PY - 2023 IS - 11 SP - 390 EP - 393 PG - 4 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/34503688 ID - 34503688 LA - Hungarian DB - MTMT ER -