Attosecond emission from chromium plasma

作者：Bom L B Elouga^*; Haessler S; Gobert O; Perdrix M; Lepetit F; Hergott J F; Carre B; Ozaki T; Salieres P

来源：Optics Express, 2011, 19(4): 3677-3685.

DOI：10.1364/oe.19.003677

We present the first measurement of the attosecond emission generated from underdense plasma produced on a solid target. We generate high-order harmonics of a femtosecond Ti:sapphire laser focused in a weakly ionized underdense chromium plasma. Using the "Reconstruction of Attosecond Beating by Interference of Two-photon Transitions" (RABITT) technique, we show that the 11(th) to the 19(th) harmonic orders form in the time domain an attosecond pulse train with each pulse having 300 as duration, which is only 1.05 times the theoretical Fourier transform limit. Measurements reveal a very low positive group delay dispersion of 4200 as(2). Beside its fundamental interest, high-order harmonic generation in plasma plumes could thus provide an intense source of attosecond pulses for applications.

• 出版日期2011-2-14
• 单位中国地震局