Demonstration of electric ring currents and magnetic fields in an atom/molecule induced by intense circularly polarized laser fields

为了实现用强激光场控制原子/分子的新方法，我们在790 nm短脉冲近红外激光场中对乙醇分子的光电离进行了以下两个发现。(1)与所产生的离子种类相关的通道特定光电子能谱取决于激光偏振的椭圆度。(2)在波长较长的1.3 mm附加激光场中，离子产率取决于两个激光脉冲之间的时间延迟以及790 nm和1.3 mm偏振方向之间的夹角。

To realize a new controlling method for atoms/molecules with intense laser fields, we have made the following two findings for photo-ionization of ethanol molecules in short-pulse near infrared laser fields at 790 nm. (1) The channel specific photoelectron spectra correlated with the produced ion species, which have been obtained by measuring the electron and ion in coincidence, depend on the ellipticity of the laser polarization. (2) In additional laser fields at the longer wavelength of 1.3 mm, the ion yield ratio depends on time delay between the two laser pulses and an angle between the 790 nm and 1.3 mm polarization directions.