利用不对称极化门方案增强阿秒脉冲的强度

Intensity enhancement in attosecond pulse by using asymmetric polarization gating technology

摘要:

理论提出了一种利用不对称极化门方案来增强阿秒脉冲强度的方法. 结果表明, 当两束圆偏振激光场采用不对称的强度时, 不仅谐波干涉减小, 而且谐波辐射强度明显增强, 呈现了一个带宽在85 eV几乎由单一量子路径贡献产生的超长连续平台区. 最后, 通过叠加该平台区的谐波辐射光谱可以获得一个半高全宽在52 as的超短单个阿秒脉冲.

Abstract:

An effective method to enhance the intensities of the attosecond pulses has been proposed by using the asymmetric polarization gating (PG) technology. The results show that when the two circularly polarized pulses are asymmetry in pulse intensity, not only the modulation of the harmonics can be decreased; but also the intensities of the harmonics can be enhanced, correspnding to a 85 eV supercontinuum with the near-single quantum path contribution. Finally, by superposing the harmonics of this supercontinuum, a single attosecond pulse with the full width at half maximum of 52 can be obtained.