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 - 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 - CHAP AU - Budai, J. AU - Pápa, Zsuzsanna AU - Petrik, Péter AU - Dombi, Péter ED - Lalanne, P. ED - Zouhdi, S. TI - Ellipsometric probing of hot electrons in plasmonic media T2 - Proceedings of the 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023 PB - META Conference T3 - META proceedings, ISSN 2429-1390 ; 2023. PY - 2023 SP - 287 EP - 288 PG - 2 UR - https://m2.mtmt.hu/api/publication/34225793 ID - 34225793 LA - English DB - MTMT ER - TY - CHAP AU - Hanus, Václav AU - Fehér, Beatrix AU - Csajbók, Viktória AU - Sándor, Péter AU - Pápa, Zsuzsanna AU - Budai, Judit AU - Wang, Zilong AU - Paul, Pallabi AU - Szeghalmi, Adriana AU - Dombi, Péter TI - On-Chip, On-Air Carrier-Envelope Phase Detector of nJ-Level Laser Pulses and Spatial CEP Sculpting 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-EQEC57999.2023.10231501 UR - https://m2.mtmt.hu/api/publication/34167648 ID - 34167648 N1 - Export Date: 08 March 2024; Conference name: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023; Conference date: 26 June 2023 through 30 June 2023; Conference code: 192392 AB - Carrier-envelope phase (CEP) is a powerful knob to steer interactions of laser light with matter in the strong-field regime, as evidenced by numerous studies of ultrafast electron dynamics in atomic, molecular and solid-state media. In the future, the CEP could be the carrier of digital information in petahertz technology [1]. For example, PHz multiplexing could be achieved by encoding information into CEP spatial maps. In addition, characterizing and controlling CEP in space will enable the scaling up of attosecond experiments [2] and the investigation of the collective behavior of extensive systems [3]. LA - English DB - MTMT ER - TY - CHAP AU - Budai, Judit AU - Pápa, Zsuzsanna AU - Petrik, P. AU - Dombi, Péter TI - Ultrasensitive Optical Probing of Plasmonic Hot Electron Occupancies 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-EQEC57999.2023.10232340 UR - https://m2.mtmt.hu/api/publication/34167601 ID - 34167601 LA - English DB - MTMT ER - TY - CHAP AU - Bánhegyi, Balázs AU - Ligeti, G. AU - Kiss, Gellért Zsolt AU - Pápa, Zsuzsanna AU - Rácz, Péter AU - Dombi, Péter TI - Ultrafast Nanoplasmonic Photoelectron Dynamics Between the Multiphoton and Strong-Field Regimes with Tunable IR Excitation 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-EQEC57999.2023.10232717 UR - https://m2.mtmt.hu/api/publication/34167555 ID - 34167555 LA - English DB - MTMT ER - TY - CHAP AU - Lovász, Béla AU - Sándor, Péter AU - Pápa, Zsuzsanna AU - Budai, Judit AU - Dombi, Péter TI - Ultrafast Interband Transition in Gold Probed by a Femtosecond Plasmonic Wavepacket 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-EQEC57999.2023.10231537 UR - https://m2.mtmt.hu/api/publication/34167521 ID - 34167521 LA - English DB - MTMT ER - TY - CHAP AU - Fehér, Beatrix AU - Hanus, Václav AU - Csajbók, Viktória AU - Pápa, Zsuzsanna AU - Budai, Judit AU - Paul, Pallabi AU - Szeghalmi, Adriana AU - Dombi, Péter TI - Non-local transfer of ultrafast currents generated by few-cycle laser pulses 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-EQEC57999.2023.10231919 UR - https://m2.mtmt.hu/api/publication/34167424 ID - 34167424 N1 - Export Date: 08 March 2024; Conference name: 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023; Conference date: 26 June 2023 through 30 June 2023; Conference code: 192392 AB - Ultrafast optoelectronics promises a several-order-of-magnitude speed-up of computational devices. In recent years several experiments emerged that demonstrated the possibility of steering electrons in matter with optical fields on femtosecond timescales and this way they established building blocks for PHz devices [1,2]. Such a typical experiment usually exploits the carrier-envelope phase (CEP) of laser pulses which causes symmetry breaking driving an oriented current in a medium. These ultrafast, CEP-dependent currents appear in a wide range of media spanning graphene, semiconductors or dielectrics. A common feature of these experiments is that currents are detected using metal electrodes and slow electrical circuit is contacted to the illuminated volume. This raises the question on what basis the current transfer from the medium to the electrodes is and whether the optical-to-electrical conversion is possible without the loss of bandwidth. A recent study [3] hints that the photocurrent transfer might be non-local, i.e. there is no need for physical transport of carriers from the volume to the electrodes. Having that in mind, we experimentally studied the relationship between the ultrafast photocurrent current, material, laser beam and geometry. We observed signatures that can be modelled with the Ramo-Shockley theorem that support the manifestation of non-local, i.e. quasi-instantaneous dynamics. LA - English DB - MTMT ER - TY - JOUR AU - Hanus, Václav AU - Fehér, Beatrix AU - Csajbók, Viktória AU - Sándor, Péter AU - Pápa, Zsuzsanna AU - Budai, Judit AU - Wang, Zilong AU - Paul, Pallabi AU - Szeghalmi, Adriana AU - Dombi, Péter TI - Carrier-envelope phase on-chip scanner and control of laser beams JF - NATURE COMMUNICATIONS J2 - NAT COMMUN VL - 14 PY - 2023 IS - 1 PG - 8 SN - 2041-1723 DO - 10.1038/s41467-023-40802-z UR - https://m2.mtmt.hu/api/publication/34112247 ID - 34112247 AB - The carrier-envelope phase (CEP) is an important property of few-cycle laser pulses, allowing for light field control of electronic processes during laser-matter interactions. Thus, the measurement and control of CEP is essential for applications of few-cycle lasers. Currently, there is no robust method for measuring the non-trivial spatial CEP distribution of few-cycle laser pulses. Here, we demonstrate a compact on-chip, ambient-air, CEP scanning probe with 0.1 µm 3 resolution based on optical driving of CEP-sensitive ultrafast currents in a metal−dielectric heterostructure. We successfully apply the probe to obtain a 3D map of spatial changes of CEP in the vicinity of an oscillator beam focus with pulses as weak as 1 nJ. We also demonstrate CEP control in the focal volume with a spatial light modulator so that arbitrary spatial CEP sculpting could be realized. LA - English DB - MTMT ER - TY - JOUR AU - Maragkaki, S. AU - Tsibidis, G.D. AU - Haizer, Ludovit AU - Pápa, Zsuzsanna AU - Flender, Roland AU - Kiss, Bálint AU - Márton, Zsuzsanna AU - Stratakis, E. TI - Tailoring surface topographies on solids with Mid-IR femtosecond laser pulses JF - APPLIED SURFACE SCIENCE J2 - APPL SURF SCI VL - 612 PY - 2023 PG - 13 SN - 0169-4332 DO - 10.1016/j.apsusc.2022.155879 UR - https://m2.mtmt.hu/api/publication/33743064 ID - 33743064 N1 - Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, Crete, Heraklion, 70013, Greece Department of Material Science and Technology, University of Crete, Heraklion, 71003, Greece ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged, H-6728, Hungary Department of Physics, University of Crete, Heraklion, 71003, Greece Cited By :1 Export Date: 11 April 2023 CODEN: ASUSE Correspondence Address: Maragkaki, S.; Institute of Electronic Structure and Laser (IESL), N. Plastira 100, Vassilika Vouton, Crete, Greece; email: marag@iesl.forth.gr Funding details: Horizon 2020 Framework Programme, H2020 Funding details: European Commission, EC Funding details: European Cooperation in Science and Technology, COST, GINOP-2.3.6-15-2015-00001 Funding details: Horizon 2020, 862016 Funding details: European Regional Development Fund, ERDF Funding text 1: The authors would like to acknowledge the support provided by the European Union's Horizon 2020 research and innovation program through the BioCombs4Nanofibres project (Grant Agreement No. 862016). GDT acknowledges support from COST Action TUMIEE (supported by COST-European Cooperation in Science and Technology). The ELI ALPS project (GINOP-2.3.6-15-2015-00001) is supported by the European Union and co-financed from the European Regional Development Fund. The authors acknowledge the contribution of Krishna Murari from ELI-ALPS during the surface patterning work and are indebted to Judit Zelena for thorough proof reading. Funding text 2: The authors would like to acknowledge the support provided by the European Union’s Horizon 2020 research and innovation program through the BioCombs4Nanofibres project (Grant Agreement No. 862016). GDT acknowledges support from COST Action TUMIEE (supported by COST-European Cooperation in Science and Technology). The ELI ALPS project (GINOP-2.3.6-15-2015-00001) is supported by the European Union and co-financed from the European Regional Development Fund. The authors acknowledge the contribution of Krishna Murari from ELI-ALPS during the surface patterning work and are indebted to Judit Zelena for thorough proof reading. AB - Irradiation of solids with ultrashort pulses using laser sources in the mid-infrared (mid-IR) spectral region is a yet predominantly unexplored field that opens broad possibilities for efficient and precise surface texturing for a wide range of applications. In the present work, we investigate both experimentally and theoretically the impact of laser sources on the generation of surface modification related effects and on the subsequent surface patterning of metallic and semiconducting materials. Through a parametric study we correlate the mid-IR pulsed laser parameters with the onset of material damage and the formation of a variety of periodic surface structures at a laser wavelength of λL = 3200 nm and a pulse duration of τp = 45 fs. Results for nickel and silicon indicate that the produced topographies comprise both high and low spatial frequency induced periodic structures, similar to those observed at lower wavelengths, while groove formation is absent. The investigation of the damage thresholds suggests the incorporation of nonlinear effects generated from three-photon-assisted excitation (for silicon) and the consideration of the role of the non-thermal excited electron population (for nickel) at very short pulse durations. The results demonstrate the potential of surface structuring with mid-IR pulses, which can constitute a systematic novel engineering approach with strong fields at long-wavelength spectral regions that can be used for advanced industrial laser applications. © 2022 Elsevier B.V. LA - English DB - MTMT ER -