论文标题
冷原子的光学二维相干光谱
Optical Two-dimensional Coherent Spectroscopy of Cold Atoms
论文作者
论文摘要
我们报告了冷原子中光学2DC的实验证明。该实验将共线2DCS设置与磁光陷阱（MOT）集成在一起，其中冷rubium（rb）原子以约200美元的温度和$ 10^{10} $ cm $ $ $ $^{ - 3} $的温度制备。使用一系列飞秒激光脉冲，我们首先获得了一维的二维非线性信号，然后获得了冷RB原子的一量子和零2D光谱。在冷原子中执行光学2DC的能力是迈向对冷原子中多体物理学以及最终在原子阵列和捕获离子中的多体物理学研究的重要步骤。冷原子/分子中的光学2DC也可能是探测冷分子中化学反应动力学的新途径。
We report an experimental demonstration of optical 2DCS in cold atoms. The experiment integrates a collinear 2DCS setup with a magneto-optical trap (MOT), in which cold rubidium (Rb) atoms are prepared at a temperature of about 200 $μ$K and a number density of $10^{10}$ cm$^{-3}$. With a sequence of femtosecond laser pulses, we first obtained one-dimensional second- and fourth-order nonlinear signals and then acquired both one-quantum and zero-quantum 2D spectra of cold Rb atoms. The capability of performing optical 2DCS in cold atoms is an important step toward optical 2DCS study of many-body physics in cold atoms and ultimately in atom arrays and trapped ions. Optical 2DCS in cold atoms/molecules can also be a new avenue to probe chemical reaction dynamics in cold molecules.
