Alignment and orientation of an adsorbed dipole molecule

Details Alignment and orientation of an adsorbed dipole molecule Alignment and orientation of an adsorbed dipole molecule

2004-04-20

arxiv.org/abs/physics/0404092v2

Phys. Rev. B 70, 233410 (2004)

Physics

Atomic Physics

4 pages, 4 figures, to appear in Phys. Rev. B (2004)

Scientific paper

10.1103/PhysRevB.70.233410

Half-cycle laser pulse is applied on an absorbed molecule to investigate its alignment and orientation behavior. Crossover from field-free to hindered rotation motion is observed by varying the angel of hindrance of potential well. At small hindered angle, both alignment and orientation show sinusoidal-like behavior because of the suppression of higher excited states. However, mean alignment decreases monotonically as the hindered angle is increased, while mean orientation displays a minimum point at certain hindered angle. The reason is attributed to the symmetry of wavefunction and can be explained well by analyzing the coefficients of eigenstates.

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