Single circularly polarized attosecond pulse generation by intense few cycle elliptically polarized laser pulses and terahertz fields from molecular media.
Single circularly polarized attosecond pulse generation by intense few cycle elliptically polarized laser pulses and terahertz fields from molecular media.
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DOI：
10.1103/physrevlett.110.023003
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发表时间：
2013-01
影响因子：
8.6
通讯作者：
K. Yuan;A. Bandrauk
中科院分区：
文献类型：
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作者：
K. Yuan;A. Bandrauk
从分子离子H2(+)的含时薛定谔方程的数值解出发，提出了一种利用短周期强椭圆偏振激光脉冲与太赫兹场相结合产生单个圆偏振阿秒脉冲的方法。结果表明，在62.5太赫兹(λ=4800 nm)场强为∼10(14)W/cm~2的情况下，椭圆偏振激光脉冲在波长为400 nm、椭圆度为ϵ=0.59的情况下，可以产生单个圆偏振的114As脉冲。基于单电子与母体离子再碰撞的经典模型，解释了圆极化阿秒脉冲的产生效率。
We present a method for producing a single circularly polarized attosecond pulse by an intense few cycle elliptically polarized laser pulse combined with a terahertz field from numerical solutions of the time-dependent Schrödinger equation for the molecular ion H2(+). It is found that in the presence of a 62.5 THz (λ=4800 nm) field at an intensity of ∼10(14) W/cm2, a single circularly polarized 114 as pulse can be generated by an elliptical polarized laser pulse at a wavelength of 400 nm with an ellipticity of ϵ=0.59. The efficiency of circular polarization attosecond pulse generation is interpreted based on a classical model of single electron recollision with the parent ion.