Generation of isolated attosecond pulses with a specific waveform two-color laser field

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2011,（4）
• 页码范围: 79-82
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201109.041901

摘要

We theoretically propo8e a new method for generating intense isolated attosecond pulses during high-order harmonic generation (HHG) process by accurately controlling electron motion with a two-color laser field,which consists of an 800-nm, 4-fs elliptically polarized laser field and a 1400-nm, ～43-fs linearly polarized laser field.With this method, the supercontinua with a spectral width above 200 eV are obtained, which can support a ～15-as isolated pulse after phase compensation.Classical and quantum analyses explain the controlling effects well.In particular, when the puLse duration of the 800-nm laser field increases to 20-fs, sub-lOO-as isolated pulses can be obtained even without any phase compensation.