Direct generation of isolated sub-50 attosecond pulse via controlling quantum paths by a low frequency field

作者：Hong Wei-Yi; Yang Zhen-Yu; Lan Peng-Fei; Lu Pei-Xiang^*

来源：Acta Physica Sinica, 2008, 57(9): 5853-5858.

DOI：10.7498/aps.57.5853

• attosecond pulse
• supercontinuum

We propose a new method to directly generate an isolated sub-50 attosecond pulse. The combination of a 5 fs driving laser pulse with the wavelength of 800 nm and a low frequency field with the wavelength of 10 mu m is adopted. The intensity of the low frequency field is 10% that of the driving pulse. It is shown that the harmonic spectrum is extended to I-P + 8.2 UPP and the harmonies above I-P + 4.2 U-P become continuous. By adjusting the phase of the carrier-envelope of the few-cycle pulse, the bandwidth of the supercontinuum can be further broadened and a close-to-Fourier-limit sub-50 as pulse is directly obtained.

• 出版日期2008-9
• 单位华中科技大学