ELFT HÍRADÓ

[Zoltan Tibai <tibai AT fizika.ttk.pte.hu>]

*PTE TTK Fizikai **Intézet** és a PAB meghívja*
*Lu Wang*
(DESY)

Simulation of terahertz generation in tilted-pulse-front setup

*c. előadására*


PTE TTK  E/417. előadó terem
2019. 05. 14. (Kedd) 9:00

Abstract:
The conventional tilted-pulse-front (TPF) setup is one of the most
promising methods to generate few-cycle terahertz pulses. Due to the
noncollinear phase matching condition and the asymmetry of the prism-shaped
nonlinear crystal geometry, the generated terahertz pulses possess large
spatial inhomogeneity.  In order to fully investigate the terahertz
generation process in the TPF scheme, a 3-D numerical model is required. In
this presentation, we compare the differences of the 1-D, 2-D, and 3-D
numerical models. The simulations suggest that the diffraction and beam
size at the dimension perpendicular to the pulse-front-tilt plane has a
negligible influence on the terahertz generation process. In contrast, the
beam size within the pulse-front-tilt plane largely influences the
generated terahertz electric field and the conversion efficiency. To
conclude, a strong spatial dependence on the terahertz electric field is
found and the few-cycle region is only generated around the apex of the
prism.