Quantum-state selection, alignment, and orientation of large molecules using static electric and laser fields

被引:136
作者
Filsinger, Frank [1 ]
Kuepper, Jochen [1 ]
Meijer, Gerard [1 ]
Holmegaard, Lotte [2 ]
Nielsen, Jens H. [3 ]
Nevo, Iftach [2 ]
Hansen, Jonas L. [4 ]
Stapelfeldt, Henrik [2 ,4 ]
机构
[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany
[2] Univ Aarhus, Dept Chem, DK-8000 Aarhus C, Denmark
[3] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark
[4] Univ Aarhus, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus C, Denmark
关键词
electric field effects; macromolecules; molecular beams; molecular orientation; molecule-photon collisions; ULTRAVIOLET SPECTROSCOPY; REACTIVE SCATTERING; ALIGNING MOLECULES; POLAR-MOLECULES; DYNAMICS; DIPOLE; BEAM; CLUSTERS; CONSTANTS; SPECTRUM;
D O I
10.1063/1.3194287
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Supersonic beams of polar molecules are deflected using inhomogeneous electric fields. The quantum-state selectivity of the deflection is used to spatially separate molecules according to their quantum state. A detailed analysis of the deflection and the obtained quantum-state selection is presented. The rotational temperatures of the molecular beams are determined from the spatial beam profiles and are all approximately 1 K. Unprecedented degrees of laser-induced alignment (<< cos(2) theta(2D)>>=0.972) and orientation of iodobenzene molecules are demonstrated when the state-selected samples are used. Such state-selected and oriented molecules provide unique possibilities for many novel experiments in chemistry and physics.
引用
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页数:13
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