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Optimal molecular alignment and orientation through rotational ladder climbing
Umeå University, Faculty of Science and Technology, Physics.
2005 (English)In: Journal of Chemical Physics, Vol. 123, 144310- p.Article in journal (Refereed) Published
Abstract [en]

We study the control by electromagnetic fields of molecular alignment and orientation in a linear, rigid-rotor model. With the help of a monotonically convergent algorithm, we find that the optimal field is in the microwave part of the spectrum and acts by resonantly exciting the rotation of the molecule progressively from the ground state, i.e., by rotational ladder climbing. This mechanism is present not only when maximizing orientation or alignment, but also when using prescribed target states that simultaneously optimize the efficiency of orientation/alignment and its duration. The extension of the optimization method to consider a finite rotational temperature is also presented.

Place, publisher, year, edition, pages
2005. Vol. 123, 144310- p.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-10984DOI: doi:10.1063/1.2049270OAI: oai:DiVA.org:umu-10984DiVA: diva2:150655
Available from: 2007-10-18 Created: 2007-10-18 Last updated: 2011-01-12Bibliographically approved

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Dion, Claude

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