01653nab a2200265 i 4500 publ27936 20230720134948.0 230720s2019 hu o 0|| Angol d 0030-4018 10.1016/j.optcom.2018.12.020 doi 31240920 mtmt SZTE Publicatio Repozitórium hun Angol Flender Roland Control of THz field waveform emitted from air plasma by chirping two-color laser pulses [elektronikus dokumentum] / Flender Roland 2019 222-226 OPTICS COMMUNICATIONS 436 Few-cycle terahertz pulses can be effectively generated in air plasma by mixing an ultrashort laser pulse with its second harmonic. The temporal overlap between these two pulses is critical, which can degrade with the mismatch of group velocities. However, the overlap between the fundamental and second harmonic can be controlled by pre-stretching the temporally separated pulses. In this paper, we study the role of chirp and the relative phase between the fundamental and its second harmonic in the formation of the terahertz waveform. We demonstrate experimentally and explain within the context of transient photocurrent model, that the combination of chirping and relative phase shifting can provide a powerful tool to control the waveform of the terahertz pulse. Fizikai tudományok Trényi-Sárosi Krisztina aut Petracs E. aut Börzsönyi Ádám aut Chikán Viktor aut http://publicatio.bibl.u-szeged.hu/27936/1/31240920.pdf Dokumentum-elérés