Dr. Tamás Nagy
tamas.nagy(at)mbi-berlin.de
+49 30 6392 1270
A3: Ultrafast Lasers and Nonlinear Optics
Haus A, 3.26
Position
- Department Head A3 "Ultrafast Lasers and Nonlinear Optics"
- Project Coordinator 1.2 "Ultrafast Laser Physics and Nonlinear Optics"
- Project Member 2.1 "Time-resolved XUV science"
- Project Member 4.1 "Implementation of Lasers and Measuring Techniques"
Research
In contemporary ultrafast science one of the main challenges is the energy and average power scaling of few-cycle pulse generation, which can extend the scope of ultrafast experiments. Basically, there are two different approaches for the generation of few-cycle drivers: one is based on traditional ultrafast lasers, most frequently on Ti:sapphire basis. However, the available gain bandwidth of laser media poses a severe limitation on the achievable minimal pulse duration, preventing the direct amplification of high-energy few-cycle pulses. In order to overcome this limitation the amplified pulses are spectrally broadened by nonlinear optical effects and subsequently compressed by chirp compensation. Although today's laser technology is capable of delivering tens of millijoules of pulse energy at multi-kHz repetition rates, the pulse compression stage has been limiting the achievable energy of few-cycle pulses. In the last years in close cooperation with Laser-Laboratorium Göttingen e.V. we have been focusing on the energy scalability of hollow-core fiber (HCF) compressors, the most widely used devices for spectral broadening of energetic pulses. For this purpose we introduced the stretched flexible HCF allowing free length scalability, which plays a key role in energy scaling. Based on our HCF technology recently we reached the TW power level at sub-2-cycle duration.
The other approach for high-energy few-cycle pulse generation is based on optical parametric amplification, where the amplification bandwidth is only limited by the phase matching condition. In this way direct amplification of few-cycle pulses is achievable. Currently we are working on a high-energy 100Hz few-cycle OPCPA system in the near-IR spectral range based on in-house pump laser development. Our objective is to exploit the potentials of both competing technologies in order to produce few cycle driver pulses well beyond 10mJ energy.
Another important aspect of ultrafast technology is pulse characterization, which is inevitable for successful light source development. In the last years we developed a number of frequency resolved optical gating (FROG) setups optimized for few-cycle pulse characterization, while currently we are investigating the dispersion scan (d-scan) technique.
Curriculum vitae
04/2016 - present | Staff scientist, Max Born Institute, Berlin, Germany |
04/2012 - 03/2016 | Research fellow 20%, Laser-Laboratorium Göttingen e.V., Germany |
10/2011 - 03/2016 | Post-doctoral researcher 80%, Intitute of Quantum Optics, Leibniz Universität Hannover, Germany |
10/2004 - 09/2011 | Research fellow, Laser-Laboratorium Göttingen e.V., Germany |
09/2000 - 09/2004 | R&D scientist, Lambda Physik AG, Göttingen, Germany |
06/2000 | PhD in Physics (summa cum laude) Thesis: "Optimization of high intensity KrF lasers" University of Szeged, Hungary, Prof. Dr. Sándor Szatmári |
07/1997 - 08/2000 | Assistant researcher, University of Szeged, Hungary |
09/1994 - 06/1997 | PhD student, Attila József University Szeged, Hungary |
06/1994 | MS degree in physics (with honour) Thesis: "Development of symmetry breaking during laser-induced oxidation", Attila József University Szeged, Hungary, Prof. Dr. László Nánai |
09/1989 - 06/1994 | Physics studies, Attila József University Szeged, Hungary |
Honors and Awards
2018 | OSA Senior Member |
Professional Service
General Chair, High-Intensity Lasers and High-Field Phenomena (HILAS), Strasbourg, 2018
Program Chair, High-Intensity Lasers and High-Field Phenomena (HILAS), Long Beach, 2016
Team Members
MBI Publikationen
- Propagation effects in the characterization of 1.5-cycle pulses by XPW dispersion scan IEEE Journal of Selected Topics in Quantum Electronics 25 (2019) 5120407/1-7
- Efficient generation of broadband MIR radiation by difference–frequency generation in LiGaS2 Ultrafast Phenomena XXI 205 EJP Web of Conferences (2019) 01019/1-3
- Advanced phase retrieval for dispersion scan: a comparative study Journal of The Optical Society America B 35 (2018) 8-19
- Resonant-plasmon-assisted subwavelength ablation by a femtosecond oscillator Physical Review Applied 9 (2018) 024001/1-9
- Efficient middle-infrared generation in LiGaS2 by simultaneous spectral broadening and difference-frequency generation Optics Letters 43 (2018) 1742-1745
- Compression of picosecond pulses from a thin-disk laser to 30fs at 4W average power Optics Express 26 (2018) 3861-3869
- Self-optimization of plasmonic nanoantennas in strong femtosecond fields Optica 4 (2017) 1038-1043
- A closer look at ultra-intense lasers Nature Photonics 10 (2016) 502-504
- Few-cycle optical pulse characterization via cross-polarized wave generation dispersion scan technique Optics Letters 41 (2016) 5246-5249
- Noninstantaneous polarization dynamics in dielectric media Optica 2 (2015) 151-157
Andere Publikationen
1. Revealing the Microscopic Real-Space Excursion of a Laser-Driven Electron
H.G. Kurz, M. Kretschmar, T. Binhammer, T. Nagy, D. Ristau, M. Lein, U. Morgner, M. Kovacev
Phys. Rev. X 6, 031029 (2016)
2. Impact of spatial inhomogeneities on on-axis pulse reconstruction in femtosecond filaments
C. Brée, M. Kretschmar, T. Nagy, H. G. Kurz, U. Morgner, and M. Kovačev
J. Phys. B: At. Mol. Opt. Phys. 48, 094002 (2015)
3. Direct observation of pulse dynamics and self-compression along a femtosecond filament
M. Kretschmar, C. Brée, T. Nagy, A. Demircan, H. G. Kurz, U. Morgner, and M. Kovačev
Opt. Express 22, 22905-22916 (2014)
4. Compression of CEP-stable multi-mJ laser pulses down to 4 fs in long hollow fibers
F. Böhle, M. Kretschmar, A. Jullien, M. Kovacs, M. Miranda, R. Romero, H. Crespo, U. Morgner, P. Simon, R. Lopez-Martens, and T. Nagy
Laser Phys. Lett. 11, 095401 (2014)
5. Nano-antennae assisted emission of extreme ultraviolet radiation
N. Pfullmann, M. Noack, J. Cardoso de Andrade, S. Rausch, T. Nagy, C. Reinhardt, V. Knittel, R. Bratschitsch, A. Leitenstorfer, D. Akemeier, A. Hütten, M. Kovacev, and U. Morgner
Ann. Phys. 526, 119-134 (2014)
6. Pulse characterization by THG d-scan in absorbing nonlinear media
M. Hoffmann, T. Nagy, T. Willemsen, M. Jupé, D. Ristau, and U. Morgner
Opt. Express 22, 5234-5240 (2014)
7. Bow-tie nano-antenna assisted generation of extreme ultraviolet radiation
N. Pfullmann, C. Waltermann, M. Noack, S. Rausch, T. Nagy, C. Reinhardt, M. Kovačev, V. Knittel, R. Bratschitsch, D. Akemeier, A. Hütten, A. Leitenstorfer, and U. Morgner
New J. Phys. 15, 093027 (2013)
8. Laser-induced condensation by ultrashort laser pulses at 248 nm
P. Joly, M. Petrarca, A. Vogel, T. Pohl, T. Nagy, Q. Jusforgues, P. Simon, J. Kasparian, K. Weber, and J.-P. Wolf
Appl. Phys. Lett. 102, 091112 (2013)
9. Optimal pulse compression in long hollow fibers
T. Nagy, V. Pervak, and P. Simon
Opt. Lett. 36, 4422-4424 (2011)
10. Generation of 200-mu J, sub-25-fs deep-UV pulses using a noble-gas-filled hollow fiber
T. Nagy, and P. Simon
Opt. Lett. 34, 2300-2302 (2009)
11. Single-shot TG FROG for the characterization of ultrashort DUV pulses
T. Nagy, and P. Simon
Opt. Express 17, 8144-8151 (2009)
12. Flexible hollow fiber for pulse compressors
T. Nagy, M. Forster, and P. Simon
Appl. Opt. 47, 3264-3268 (2008)
13. Hollow-fiber pulse compressor for KrF lasers
J. H. Klein-Wiele, T. Nagy, and P. Simon
Appl. Phys. B 82, 567-570 (2006)
14. Changes in DRIFT spectra of wood irradiated by UV laser as a function of energy
G. Papp, E. Barta, E. Preklet, L. Tolvaj, O. Berkesi, T. Nagy, and S. Szatmári
J. Photochem. Photobiol., A 173, 137-142 (2005)
15. Changes in DRIFT spectra of softwood irradiated by UV laser as a function of energy
E. Barta, G. Papp, E. Preklet, L. Tolvaj, O. Berkesi, T. Nagy, and S. Szatmári
Acta Silv. Lign. Hung. 1, 83-91 (2005)
16. Sub-0.25-pm 50-W amplified excimer laser system for 193-nm lithography
S. Govorkov, A. Wiessner, G. Hua, T. Misuryaev, A. Knysh, S. Spratte, P. Lokai, T. Nagy, I. Bragin, A. Targsdorf, T. Schroeder, H.‑S. Albrecht, R. Desor, T. Schmidt, and R. Paetzel
Proc. SPIE 5377, 1787-1796 (2004)
17. High-power excimer lasers for 157-nm lithography
S. Spratte, F. Voss, I. Bragin, E. Bergmann, N. Niemoeller, T. Nagy, U. Rebhan, A. Targsdorf, R. Paetzel, S. Govorkov, and G. Hua
Proc. SPIE 5040, 1344-1351 (2003)
18. High-Power High-Repetition Rate F2-Lasers for 157 nm Lithography
K. Vogler, I. Klaft, F. Voss, I. Bragin, E. Bergmann, T. Nagy, N. Niemoeller, S. Spratte, R. Paetzel, G. Hua, and S. Govorkov
Proc. SPIE 4691, 660-670 (2002)
19. Advanced F2-lasers for 157 nm Lithography
K. Vogler, I. Klaft, F. Voss, I. Bragin, E. Bergmann, T. Nagy, N. Niemoeller, R. Paetzel, S. Govorkov, and G. Hua
Proc. SPIE 4346, 1175-1182 (2001)
20. Effect of UV-laser irradiation on structural changes of maplewood lignin-polysaccharide comlpex
B. Kosikova, V. Sasinkova, L. Tolvaj, G. Papp, S. Szatmári, and T. Nagy
Drev. Vysk. 46, 11-18 (2001)
21. Spectral development of short pulses in KrF gain modules
T. Nagy, P. Simon, and S. Szatmari
Appl. Phys. B 71, 495-501 (2000)
22. Spectral evolution of short pulses in KrF amplifiers
T. Nagy, P. Simon, and S. Szatmari
Laser Phys. 10, 387-390 (2000)
23. Photodegradation of leaf-woods caused by 248.5 nm laser
E. Barta, L. Tolvaj, T. Nagy, S. Szatmári, O. Berkesi, and G. Papp
Drev. Vysk. 44, 13-19 (1999)
24. Harmonic generation in plasmas of different density gradients
I. B. Foldes, J. S. Bakos, Z. Bakonyi, T. Nagy, and S. Szatmari
Phys. Lett. A 258, 312-316 (1999)
25. Wood degradation caused by UV-laser of 248 nm wavelength
E. Barta, L. Tolvaj, G. Papp, T. Nagy, S. Szatmári, and O. Berkesi
Holz Roh Werkst. 56, 318-318 (1998)
26. Nonlinear spectral filtering of femtosecond pulses
P. Simon, T. Nagy, and S. Szatmari
Opt. Commun. 145, 155-158 (1998)
27. Optimization of the output beam homogeneity of short-pulse KrF amplifiers
M. Feuerhake, P. Simon, G. Almasi, T. Nagy, and S. Szatmari
Appl. Opt. 36, 4094-4098 (1997)
28. Harmonic generation in a UV laser plasma
I. B. Foldes, J. S. Bakos, G. Veres, Z. Bakonyi, T. Nagy, and S. Szatmari
IEEE J. Sel. Top. Quantum Electron. 2, 776-781 (1996)