Opt Lett. 2018 Jul 15;43(14):3220-3223. doi: 10.1364/OL.43.003220.
We report on the scaling of the photoelectron holography with the laser ellipticity in strong-field atomic ionization. We find that the spacing of the holographic fringe gradually decreases with increasing of the ellipticity. In terms of the strong-field approximation, the scaling of the fringe spacing with the laser ellipticity is explained by the effect of the initial transverse momenta at the tunnel exit. With increasing of the laser ellipticity, a ridge structure arising from forward scattering electrons is observed in the low-energy region of the electron momentum distribution. An analytic formula is obtained that demarcates the phase diagram for the observation of the holographic pattern and ridge structure in elliptically polarized laser fields.
我们报告了在强场原子电离中，光电子全息术随激光椭圆度的标度。我们发现，全息条纹的间距随着椭圆度的增加而逐渐减小。在强场近似下，条纹间距随激光椭圆度的标度可以用隧道出口处初始横向动量的影响来解释。随着激光椭圆度的增加，在电子动量分布的低能区域观察到一个源于前向散射电子的脊结构。得到了一个解析公式，它划分了在椭圆偏振激光场中观察到全息图和脊结构的相位图。
