Details

Autor(en) / Beteiligte

• Wang, Yunhui
• Wu, Haiping
• Qian, Yan
• Shi, Qi
• Yu, Chao
• Chen, Ying
• Deng, Kaiming
• Lu, Ruifeng

Titel

Laser-parameter effects on the generation of ultrabroad harmonic and ultrashort attosecond pulse in a long-plus-short scheme: JMO Series: Attosecond and Strong Field Science

Ist Teil von

• Journal of modern optics, 2012-11, Vol.59 (19), p.1640-1649

Ort / Verlag

Taylor & Francis Group

Erscheinungsjahr

2012

Quelle

Taylor & Francis 数据库

Beschreibungen/Notizen

• By numerically solving the time-dependent Schrödinger equation for helium gas in a special two-color laser field, which is synthesized by a long (9 fs) driving pulse and a short (6 fs) controlling pulse, we discuss the influence of the carrier-envelope phase, frequency, and the intensity of the controlling pulse on the generation of harmonic spectra and isolated attosecond pluses. In the cutoff region, two or three plateaus can be controlled by optimizing these laser parameters, and an ultrabroad supercontinuum harmonic spectrum with a bandwidth of 800 eV can be produced, which can support an ultrashort isolated 4.5 as pulse generation by Fourier transformation. Furthermore, using classical ionizing and returning energy maps, time-frequency analyses are presented to explain the underlying physical mechanisms.