深脉冲光晶格振荡拉曼质谱
Raman mass-spectrometry via oscillatory motion in deep pulsed optical lattices
摘要：
我们描述了一种新的光学诊断，用于确定气体的组成，通过测量原子和分子的运动被困在非常深的光晶格。这种非共振方法类似于传统的拉曼散射，除了观察到的光谱特征涉及晶格内每个物种的振荡质心运动，由它们各自的极化率与质量比唯一地确定。取决于被探测样品的密度，检测要么通过高端的光学散射发生，要么通过低端的非共振电离发生。我们表明，这样的技术是传统的质谱技术的补充，并设想其在现有仪器的实施。
英文摘要：
We describe a new optical diagnostic for determining the composition of gases by measuring the motion of atoms and molecules trapped within very deep optical lattices. This non-resonant method is analogous to conventional Raman scattering, except that the observed spectral features relate to the oscillatory center-of-mass motion of each species within the lattice, determined uniquely by their respective polarizability-to-mass ratio. Depending on the density of the probed sample, detection occurs either via optical scattering at the high end or via non-resonant ionization at the lower end. We show that such a technique is complementary to conventional mass spectrometry techniques and envision its implementation in existing instruments.
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