Title :
Measurement of high-order harmonic pulse width and electron recombination time by field ionization
Author :
Kobayashi, Yoshiyuki ; Yoshihara, O. ; Nabekawa, Yasuo ; Kondo, K. ; Watanabe, Shigetaka
Author_Institution :
Inst. for Solid State Phys., Tokyo Univ., Japan
Abstract :
Summary form only given. In recent years high-order harmonic generation has become a promising method for the production of coherent XUV or soft X-ray radiation. In this study we demonstrate a pulse width measurement of the high-order harmonic pulse using the change of the bound-free absorption by the femtosecond dynamics of field ionization. The 9th harmonic of Ti:sapphire is absorbed by neutral Kr atoms, but not absorbed by Kr/sup +/ because the photon energy of the 9th harmonic (14.1 eV) is higher than the ionization potential of neutral Kr (14.0 eV), but is lower than that of Kr/sup +/ (24.4 eV).
Keywords :
field ionisation; high-speed optical techniques; ion recombination; optical harmonic generation; Kr; Kr atom; XUV radiation; bound-free absorption; electron recombination time; femtosecond dynamics; field ionization; high-order harmonic generation; pulse width measurement; pump-probe method; soft X-ray radiation; temporal properties; Atomic measurements; Electromagnetic wave absorption; Electrons; Frequency conversion; Ionization; Production; Pulse measurements; Space vector pulse width modulation; Spontaneous emission; Time measurement;
Conference_Titel :
Lasers and Electro-Optics, 1996. CLEO '96., Summaries of papers presented at the Conference on
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-55752-443-2
