Plasma effect on the phase matching of high harmonic generation

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2011,（1）
• 页码范围: 75-78
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201109.011901

摘要

By optimizing the phase matching condition of high harmonic generation (HHG) from a supersonic neon gas jet, the enhanced HHG in the region of 60-70 eV has been selected. Three-dimensional numerical calculation shows that plasma plays a significant role in the phase matching process of HHG in a supersonic gas jet with short medium length. Due to plasma formation, the harmonic emission decays as the laser intensity reaches over 3.5 × 1014 W/cm2. The plasma induces the broadening and blue shift of the HHG spectra, which provides a method for fine-tuning the harmonic wavelength.