论文标题
使用圆形二色性控制多光子电离中的能量转移
Using circular dichroism to control energy transfer in multi-photon ionization
论文作者
论文摘要
手性会导致对称性破裂，从粒子物理学到生物化学的各种自然现象。我们研究了最简单的手性系统之一，这是激光激光，定向，有效的单电子li目标。原子在光学陷阱中以| M | = 1的偏光p状态制备，暴露于共旋转和反向旋转的圆形偏振飞秒激光脉冲。对于在定向初始状态的激发能量附近的场频率时，观察到强圆二色性，并且光电子能量受到螺旋依赖性依赖性自动镇分裂的显着影响。除了其基本相关性外，该系统还适合创建自旋极化的电子脉冲，并在飞秒时间尺度上以可逆的开关进行可逆的开关，并以几分MeV的能量分辨率。
Chirality causes symmetry breaks in a large variety of natural phenomena ranging from particle physics to biochemistry. We investigate one of the simplest conceivable chiral systems, a laser-excited, oriented, effective one-electron Li target. Prepared in a polarized p state with |m|=1 in an optical trap, the atoms are exposed to co- and counter-rotating circularly polarized femtosecond laser pulses. For a field frequency near the excitation energy of the oriented initial state, a strong circular dichroism is observed and the photoelectron energies are significantly affected by the helicity-dependent Autler-Townes splitting. Besides its fundamental relevance, this system is suited to create spin-polarized electron pulses with a reversible switch on a femtosecond timescale at an energy resolution of a few meV.
