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使用斯塔克诱导的绝热拉曼通道技术实现D2分子的高效相干布居转移

Efficient Coherent Population Transfer of D2 Molecules by Stark-induced Adiabatic Raman Passage

  • 摘要: 使用斯塔克诱导的绝热拉曼通道技术,成功地将分子束中的D2分子从(v=0, J=0)转移至(v=1, J=0). 激发效率达到了75%.该技术将为交叉分子束和分子束-表面散射实验研究氢分子的振动激发对化学反应的影响提供一个独特的工具.

     

    Abstract: Preparation of a high flux of hydrogen molecules in a specific vibrationally excited state is the major prerequisite and challenge in scattering experiments that use vibrationally excited hydrogen molecules as the target. The widely used scheme of stimulated Raman pumping suffers from coherent population return which severely limits the excitation efficiency. Re-cently we successfully transferred D2 molecules in the molecular beam from (v=0, J=0) to (v=1, J=0) level, with the scheme of Stark-induced adiabatic Raman passage. As high as 75% of the excitation efficiency was achieved. This excitation technique promise to be a unique tool for crossed beam and beam-surface scattering experiments which aim to reveal the role of vibrational excitation of hydrogen molecules in the chemical reaction.

     

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