Title :
Photoionization mechanisms of oxygen probed by terahertz pulses
Author :
Z. Mics;F. Kadlec;P. Kuzel;P. Jungwirth;S.E. Bradforth;V.A. Apkarian
Author_Institution :
Inst. of Phys., Acad. of Sci. of the Czech Rep., Prague, Czech Republic
fDate :
6/27/1905 12:00:00 AM
Abstract :
We show that optical pump - terahertz (THz) probe spectroscopy is a suitable experimental tool for exploring laser induced ionization and plasma formation in gases. Plasma was produced in gaseous oxygen by focused amplified femtosecond pulses. Multi-photon versus strong-field character of the photoionization are investigated using different pump wavelengths (400 and 800 nm), polarization states and intensity. A Drude model is used to evaluate the plasma dynamics.
Keywords :
"Ionization","Plasma waves","Optical pulses","Pulse amplifiers","Ultrafast optics","Stimulated emission","Optical pumping","Laser excitation","Probes","Spectroscopy"
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572624
