Orienting Asymmetric Molecules by Laser Fields with Twisted Polarization
| Autor: | E. Gershnabel, I. Sh. Averbukh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
FOS: Physical sciences
General Physics and Astronomy 02 engineering and technology 01 natural sciences Molecular physics law.invention Optics Polarizability law Physics - Chemical Physics 0103 physical sciences Molecule 010306 general physics Chemical Physics (physics.chem-ph) Physics business.industry Molecular axis 021001 nanoscience & nanotechnology Laser Polarization (waves) Dipole 0210 nano-technology business Microwave Excitation Optics (physics.optics) Physics - Optics |
| Zdroj: | Physical Review Letters. 120 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.120.083204 |
| Popis: | We study interaction of generic asymmetric molecules with a pair of strong time-delayed short laser pulses with crossed linear polarizations. We show that such an excitation not only provides unidirectional rotation of the most polarizable molecular axis, but also induces a directed torque along this axis, which results in the transient orientation of the molecules. The asymmetric molecules are chiral in nature and different molecular enantiomers experience the orienting action in opposite directions causing out-of-phase oscillation of their dipole moments. The resulting microwave radiation was recently suggested to be used for analysis/discrimination of chiral molecular mixtures. We reveal the mechanism behind this laser induced orientation effect, show that it is classical in nature, and envision further applications of light with skewed polarization. 8 pages, 5 figures |
| Databáze: | OpenAIRE |
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