TY - CHAP AU - Zerihun, T. Godana AU - Hebling, János AU - Pálfalvi, László ED - Sergey, Y. Yurish TI - Radially Polarized Electromagnetic Wave Focused by a Segment of a Parabolic Mirror T2 - Optics, Photonics and Lasers: Proceedings of the 6th International Conference on Optics, Photonics and Lasers (OPAL' 2023) PB - International Frequency Sensor Association (IFSA) CY - Barcelona SN - 9788409483358 PY - 2023 SP - 64 EP - 67 PG - 4 UR - https://m2.mtmt.hu/api/publication/34735663 ID - 34735663 LA - English DB - MTMT ER - TY - CHAP AU - Li, S. AU - Sharma, Ashutosh AU - Nugraha, Priyo Syamsul AU - Márton, Zsuzsanna AU - Lombosi, Csaba AU - Ollmann, Zoltán AU - Márton, István AU - Dombi, Péter AU - Hebling, János AU - Fülöp, József András TI - Subcycle Surface Electron Emission by Strong-Field THz Waveforms T2 - 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) PB - IEEE CY - Online kiadás SN - 9798350345995 PY - 2023 PG - 1 DO - 10.1109/CLEO/Europe-EQEC57999.2023.10232282 UR - https://m2.mtmt.hu/api/publication/34167463 ID - 34167463 LA - English DB - MTMT ER - TY - JOUR AU - Korpa, Csaba AU - Lutz, Matthias F. M. AU - Guo, Xiao-Yu AU - Heo, Yonggoo TI - Coupled-channel system with anomalous thresholds and unitarity JF - PHYSICAL REVIEW D J2 - PHYS REV D VL - 107 PY - 2023 IS - 3 PG - 6 SN - 2470-0010 DO - 10.1103/PhysRevD.107.L031505 UR - https://m2.mtmt.hu/api/publication/33668822 ID - 33668822 LA - English DB - MTMT ER - TY - JOUR AU - Lutz, Matthias F. M. AU - Guo, Xiao-Yu AU - Heo, Yonggoo AU - Korpa, Csaba TI - Coupled-channel dynamics with chiral long-range forces in the open-charm sector of QCD JF - PHYSICAL REVIEW D J2 - PHYS REV D VL - 106 PY - 2022 IS - 11 PG - 39 SN - 2470-0010 DO - 10.1103/PhysRevD.106.114038 UR - https://m2.mtmt.hu/api/publication/33541533 ID - 33541533 LA - English DB - MTMT ER - TY - CHAP AU - Illes, Gergo AU - Tibai, Zoltán AU - Pálfalvi, László AU - Sarkadi, Balazs AU - Meszaros, Anna AU - Almási, Gábor AU - Hebling, János AU - Tóth, György TI - Terahertz generation by imaging-free nonlinear echelon slab T2 - Optica High-brightness Sources and Light-driven Interactions Congress 2022 PB - Optica Publishing Group CY - Washington DC SN - 9781957171067 PY - 2022 DO - 10.1364/EUVXRAY.2022.JW5A.13 UR - https://m2.mtmt.hu/api/publication/33082893 ID - 33082893 LA - English DB - MTMT ER - TY - CHAP AU - Nasi, L. AU - Illes, G. AU - Nazymbekhov, G. AU - Pálfalvi, László AU - Hebling, János AU - Tóth, György TI - Comparison of lithium niobate based multicycle terahertz sources for pulse shape control T2 - Optica High-brightness Sources and Light-driven Interactions Congress 2022 PB - Optica Publishing Group CY - Washington DC SN - 9781957171067 PY - 2022 DO - 10.1364/MICS.2022.MTh3C.2 UR - https://m2.mtmt.hu/api/publication/33082678 ID - 33082678 LA - English DB - MTMT ER - TY - JOUR AU - Tibai, Zoltán AU - Mbithi, Nelson AU - Almási, Gábor AU - Fülöp, József András AU - Hebling, János TI - Design of Semiconductor Contact Grating Terahertz Source with Enhanced Diffraction Efficiency JF - CRYSTALS J2 - CRYSTALS VL - 12 PY - 2022 IS - 8 PG - 11 SN - 2073-4352 DO - 10.3390/cryst12081173 UR - https://m2.mtmt.hu/api/publication/33077051 ID - 33077051 N1 - Institute of Physics, University of Pécs, Ifjúság ú. 6, Pécs, 7624, Hungary Szentágothai Research Centre, University of Pécs, Ifjúság ú. 20, Pécs, 7624, Hungary ELI-ALPS, ELI-Hu Nonprofit Ltd, Wolfgang Sandner u 3, Szeged, 6728, Hungary MTA-PTE High-Field Terahertz Research Group, Ifjúság ú. 6, Pécs, 7624, Hungary Cited By :2 Export Date: 8 May 2023 Correspondence Address: Hebling, J.; Institute of Physics, Ifjúság ú. 6, Hungary; email: hebling@fizika.ttk.pte.hu Funding details: Hungarian Scientific Research Fund, OTKA, 129134 Funding details: Magyar Tudományos Akadémia, MTA Funding text 1: Zoltán Tibai would like to thank the support of the János Bolyai Research Scholarship of the Hungarian Academy of Science. Funding text 2: National Research, Development, and Innovation Office (2018-1.2.1-NKP-2018-00010, TKP2021-EGA-17), and the Hungarian Scientific Research Fund (OTKA) (129134). AB - We report a semiconductor contact grating terahertz source design based on a rectangular profile for phase-matched terahertz generation in the long infrared pump wavelength range. The calculations show that the best diffraction efficiency can be achieved by a filling factor significantly smaller than 50%. Furthermore, the possibility of diffraction efficiency enhancement was investigated by applying three different antireflective coating structures. Numerical simulations have indicated that at 2.06 μm and 3.0 μm pump wavelength, diffraction efficiencies greater than 91% and 89% can be achieved by adding an appropriate antireflective coating to the GaP and GaAs contact grating structure, respectively. In addition, numerical simulations were performed to investigate the influence of wall angles on diffraction efficiency. The results reveal that the wall angle does not significantly affect the diffraction efficiency: while keeping the wall angle deviation from the vertical below 25 degrees, the efficiency drop remains below 5% for otherwise optimal grating parameters. LA - English DB - MTMT ER - TY - JOUR AU - Tibai, Zoltán AU - Turnár, Szabolcs AU - Tóth, György AU - Hebling, János AU - Jolly, Spencer W. TI - Spatiotemporal modeling of direct acceleration with high-field terahertz pulses JF - OPTICS EXPRESS J2 - OPT EXPRESS VL - 30 PY - 2022 IS - 18 SP - 32861 EP - 32870 PG - 10 SN - 1094-4087 DO - 10.1364/OE.461421 UR - https://m2.mtmt.hu/api/publication/33066987 ID - 33066987 AB - We present an improved model for electron acceleration in vacuum with high-energy THz pulses that includes spatiotemporal effects. In our calculations, we examined the acceleration with 300 GHz and 3.0 THz central frequency THz pulses with properties corresponding to common sources, and compared the Gaussian and Poisson spectral amplitudes and the associated time profiles of the electric fields. Our calculation takes into account both the longitudinal field and the spatio-spectral evolution around the focus. These aspects of the model are necessary due to the tight focusing and the duration towards a single-cycle of the THz pulses, respectively. The carrier-to-envelope phase (CEP) and the tilting angle of the coincident few- or single-cycle THz pulses must be tuned in all cases in order to optimize the acceleration scheme. We reveal additionally that electron beams with different final energies and different divergences can be generated based on simulated THz pulses having different Porras factors, describing the frequency dependence of the spatiotemporal amplitude profile, which may depend strongly on the method used to generate the single-cycle THz pulses. LA - English DB - MTMT ER - TY - JOUR AU - Turnár, Szabolcs AU - Krizsán, Gergő AU - Hebling, János AU - Tibai, Zoltán TI - Waveguide structure based electron acceleration using terahertz pulses JF - OPTICS EXPRESS J2 - OPT EXPRESS VL - 30 PY - 2022 IS - 15 SP - 27602 EP - 27608 PG - 7 SN - 1094-4087 DO - 10.1364/OE.459282 UR - https://m2.mtmt.hu/api/publication/33032022 ID - 33032022 LA - English DB - MTMT ER - TY - JOUR AU - Ádám, Péter AU - Bódog, Ferenc AU - Koniorczyk, Mátyás AU - Mechler, Mátyás Illés TI - Single-photon sources based on asymmetric spatial multiplexing with optimized inputs JF - PHYSICAL REVIEW A J2 - PHYS REV A VL - 105 PY - 2022 IS - 6 PG - 14 SN - 2469-9926 DO - 10.1103/PhysRevA.105.063721 UR - https://m2.mtmt.hu/api/publication/32936193 ID - 32936193 LA - English DB - MTMT ER -