Rezultate si publicatii:

Ianuarie — Iunie 2016

Articole ISI:

 

1. B. Schütte, P. Weber, K. Kovács, E. Balogh, B. Major, V. Tosa, S. Han, M. J. J. Vrakking, K. Varjú, and A. Rouzée, Bright attosecond soft X-ray pulse trains by transient phase-matching in two-color high-order harmonic generation, Opt. Express 23, 33947-33955 (2015), doi:10.1364/OE.23.033947

2. V. Tosa, K. Kovacs, B. Major, E. Balogh, K. Varju, Propagation effects in highly ionised gas media, Quantum Electronics 46 (4) 321-326  (2016), doi:10.1070/QEL16039

 

Prezentari la conferinte internationale:

 

1. Christoph Heyl, Helene Coudert-Alteirac, Miguel Miranda, Maite Louisy, Anne L'Huillier, Cord L. Arnold, Katalin Kovács, Valer Tosa, Emeric Balogh, Katalin Varjú, Arnaud Couairon, Scaling Nonlinear Optics in Gases, High Intensity Lasers and High Field Phenomena 2016, doi:10.1364/HILAS.2016.HS2B.4

2. Bruno E. Schmidt, Nicolas Thiré, Vincent Cardin, Samuel Beaulieu, Vincent Wanie, François Légaré, Matteo Negro, Caterina Vozzi, Valer Tosa, Single shot absorption measurements in the water window XUV region via HHG, High Intensity Lasers and High Field Phenomena 2016, doi:10.1364/HILAS.2016.HT2B.1

3. Henning Carstens, Maximilian Högner, Tobias Saule, Simon Holzberger, Nikolai Lilienfein, Alexander Guggenmos, Tino Eidam, Dominik Esser, Valer Tosa, Vladimir Pervak, Jens Limpert, Andreas Tünnermann, Ulf Kleineberg, Ferenc Krausz, and Ioachim Pupeza, Cavity-enhanced high-harmonic generation at 250 MHz, High Intensity Lasers and High Field Phenomena 2016, doi:10.1364/HILAS.2016.HM6B.6

4. Balázs Major, Emeric Balogh, Katalin Varjú, Katalin Kovács, Bastian Manschwetus, Balazs Farkas, Sylvain Maclot, Linnea Rading, Piotr Rudawski, Christoph Heyl, Helene Coudert-Alteirac, Per Johnsson, Anne L'Huillier, Valer Tosa, Macroscopic Optimization of High Harmonic Generation for High Power Laser Pulses, High Intensity Lasers and High Field Phenomena 2016, doi:10.1364/HILAS.2016.HM6B.4

5. B. Major, K. Kovács, B. Manschwetus, E. Balogh, S. Maclot, L. Rading, P. Rudawski, C.M. Heyl, H. Coudert-Alteirac, B. Farkas, P. Johnsson, V. Tosa, A. L'Huillier, K. Varjú, Macroscopic Optimization of High Harmonic Generation for High Power Laser Pulses, High-Intensity Lasers and High-Field Phenomena (HILAS)

6. Valer Tosa, Katalin Kovacs, Characteristics of Femtosecond Laser Pulses Propagating in Multiple Ionised Rare Gases, International Conference: Physics of Highly Charged ions (HCI2016)

7. C. L. Arnold, C. M. Heyl, H. Coudert-Alteirac, M. Miranda, M. Louisy, K. Kovacs, V. Tosa, E. Balogh, K. Varjú, A. L’Huillier, and A. Couairon, Energy scaling of gas nonlinear optics, International Symposium on Filamentation (COFIL2016)

 

Ianuarie — Decembrie 2015

Principalele activitati realizate in semestrul II.

In cea de-a doua faza a proiectului:

· am dezvoltat si testat metodologia pentru calcularea propagarii pulurilor laser intr-un mediu ionizat. Aceasta va fi trimisa echipei ELI ca un executabil sau DLL ce poate fi integrat in mediul de control al pulsului

· am dezvoltat metoda de calcul a transportului unui fascicol fara simetrie axiala a intensitatii sau fazei; si acest modul de calcul poate fi integrat intr-un mediu de control al fascicolului laser ELI.

De asemenea, in timpul dezvoltarii aplicatiei, am obtinut cateva rezultate aditionale:

· Am calculat campul laser in cazul focalizarii in medii gazoase de N₂ si Ar care pot produce ionizari multiple.

· Am calculat divergenta fascicolului laser la iesirea din regiunea de interactie (la cererea fizicienilor de la ELI-NP, necesara pentru optimziarea experimentelor)

· Am evidentiat existenta unei configuratii laser noi la intensitati mari la formarea unui puls unic de atosecunde

· Am evidentiat propagarea pulsurilor laser in plasma si rolul electronilor ablati in generarea de armonice.

Se va completa tabelul si se va pozitiona la sfarsitul raportului.

 

 

Raport fază

 

Articole ISI:

 

1. Katalin Kovács, Valer Toșa, Balázs Major, Emeric Balogh, and Katalin Varjú, High-Efficiency Single Attosecond Pulse Generation With a Long-Wavelength Pulse Assisted by a Weak Near-Infrared Pulse, IEEE J. Sel. Top. Quant. Electron. 21 (5), 870207 (2015)

2. Rashid A. Ganeev, Valer Toșa, Katalin Kovács, Masayuki Suzuki, Shin Yoneya, and Hiroto Kuroda, Influence of ablated and tunneled electrons on quasi-phase-matched high-order-harmonic generation in laser-produced plasma, Phys. Rev. A 91, 043823 (2015)

 

Prezentari la conferinte internationale:

 

1. Valer Tosa, Katalin Kovács, Propagation of femtosecond laser pulses in highly ionized gas media, International Conference on Extreme Light (ICEL2015)

2. K. Kovács, B. Major, E. Balogh, B. Manschwetus, P. Rudawski, B. Farkas, C.M. Heyl, P. Johnsson, V. Tosa, P. Johnsson, A. L'Huillier, K. Varjú, Exploring focusing geometries for harmonic generation by high power laser pulses, International Conference on Extreme Light (ICEL2015)

3. V. Tosa, J.S. Lee, H.T. Kim, C.H. Nam, Ionization induced lighthouse effect in Ar, prezentare orala: 5^th International Conference on Attosecond Physics ATTO2015, 6-10 July, Saint-Sauveur, Québec, Canada

4. K. Kovács et al., Macroscopic optimization of high harmonic generation for high power laser pulses, POSTER P2-39: 5^th International Conference on Attosecond Physics ATTO2015, 6-10 July, Saint-Sauveur, Québec, Canada

5. E. Balogh, K. Kovács, et al., Spectral shifts and asymmetries in two-color high-order harmonic generation, POSTER P3-33: 5^th International Conference on Attosecond Physics ATTO2015, 6-10 July, Saint-Sauveur, Québec, Canada

6. K. Kovács, V. Toșa, E. Balogh, B. Major, and K. Varjú, Single- and double attosecond pulses obtained from 50 fs long mid-IR and near-IR pulses, POSTER T3-11: 10^th International Conference PIM 2015, 23-25 Sept. Cluj-Napoca, RO (www.pim.itim-cj.ro)

7. V. Tosa, K. Kovacs, Modeling high order harmonics in successive plasma media, POSTER T3-28: 10^th International Conference PIM 2015, 23-25 Sept. Cluj-Napoca, RO (www.pim.itim-cj.ro)

8. A. Falamas, N. Tosa, V. Tosa, Measuring the frequency chirp of white light continuum in a pump-probe system, POSTER T2-9: 10^th International Conference PIM 2015, 23-25 Sept. Cluj-Napoca, RO (www.pim.itim-cj.ro)

9. V. Tosa, K. Kovacs, Propagation of femtosecond laser pulses in highly ionized gas media, POSTER, International Conference on Extreme Light, ICEL 2015, 23-27 Nov. 2015, Bucuresti, RO

10. K. Kovács, B. Major, P. Johnsson, E. Balogh, B. Manschwetus, V. Tosa, P. Johnsson, P. Rudawski, A. L'Huillier, K. Varjú, B. Farkas, Exploring focusing geometries for harmonic generation by high power laser pulses, POSTER, International Conference on Extreme Light, ICEL 2015, 23-27 Nov. 2015, Bucuresti, RO

11. A. Falamas, N. Tosa, V. Tosa, Measuring the frequency chirp of white-light continuum in a pump-probe system, POSTER, International Conference on Extreme Light, ICEL 2015, 23-27 Nov. 2015, Bucuresti, RO

 

Altele:

 

1.      Capitol de carte: Attila Bende: "Modeling laser induced molecule excitations using real-time time-dependent density functional theory", Annual Reports in Computational Chemistry, (in print, 2015)

 

Iulie — Decembrie 2014.

În prima fază a proiectului am elaborat o metodologie generală de abordare a problemei de diagnoză și descriere de puls laser în locuri inaccesibile pentru măsurători experimentale. Strategia este gândită în așa fel încât să fie ușor adaptabilă la configurația experimentală care încă nu este construită. Am alcătuit modelul de cacul din două părți: prima parte tratează propagrea pulsurilor laser în medii liniare (metorda transformatei Hankel generalizată) la intensități moderate, iar a doua parte este propagarea pulsurilor în medii puternic ionizante și implicit neliniare (rezolvarea ecuației de undă).

 

Raport fază

 

Articole ISI:

 

1. R. A. Ganeev, V. Toşa, K. Kovács, M. Suzuki, S. Yoneya, and H. Kuroda, Influence of ablated and tunneled electrons on quasi-phase-matched high-order-harmonic generation in laser-produced plasma, Physical Review A, 91, 043823 (2015)

2. Katalin Kovács, Valer Toşa, Balázs Major, Emeric Balogh, and Katalin Varjú, High-Efficiency Single Attosecond Pulse Generation With a Long-Wavelength Pulse Assisted by a Weak Near-Infrared Pulse, IEEE Journal of Selected Topics in Quantum Electronics, 21(5), 8700207 (2015)

3. M. Negro, M. Devetta, D. Facciala, A.G. Ciriolo, F. Calegari, F. Frassetto, L. Poletto, V. Tosa, C. Vozzi, and S. Stagira, Non-collinear high-order harmonic generation by three interfering laser beams, Optics Express 22, 29778 (2014)

 

Prezentari la conferinte internationale:

 

1. Falamas A. My laser experience presented at the Summerschool “Lasers in Medicine and Life Sciences”, 14.7-25.07.2014 Szeged, Hungary

2. Tosa V. Single attosecond pulses in water window from synthesized waveforms, presented at ECLIM 2014, 31.08-05.09.2014, Paris, France

INCDTIM