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2013-12-18 Prof. Stelios Tzortzakis - IESL-FORTH & University of Crete, Greece

"Taming strong ultrashort laser and THz fields"

The nonlinear propagation of ultrashort laser pulses in the form of solitons, filaments and light bullets is an exciting research field. Beyond the basic studies on the complex physical phenomena involved, the field is driven significantly by the numerous applications. One major application is the use of filaments as sources of intense THz radiation. The strength of these sources is such that opens the way to perform excitation and nonlinear optics experiments in this part of the spectrum (see e.g. [1]). In this presentation I will discuss a number of studies we have been performing on taming these strong laser and THz fields based on two major approaches : using exotic wave packets (see e.g. [2,3]) and photonic lattices (see e.g. [4]).

[1] J.-M. Manceau, P. A. Loukakos and S. Tzortzakis, “Direct acoustic phonon excitation by intense and ultrashort THz pulses”, Appl. Phys. Lett. 97, 251904 (2010)

[2] D. Abdollahpour, S. Suntsov, D. G. Papazoglou, and S. Tzortzakis, “Spatio-temporal Airy light bullets in the linear and nonlinear regimes”, Phys. Rev. Lett. 105, 253901 (2010)

[3] P. Panagiotopoulos, D. G. Papazoglou, A. Couairon, and S. Tzortzakis "Sharply autofocused ring-Airy beams transforming into nonlinear intense light bullets" Nature Communications 4, 2622 (2013)

[4] M. Bellec, P. Panagiotopoulos, D. G. Papazoglou, N. K. Efremidis, A. Couairon, and S. Tzortzakis, Observation and optical tailoring of photonic lattice filaments, Phys. Rev. Lett. 109, 113905 (2012)