All-optical Field-free Three-Dimensional Orientation of Asymmetric-Top Molecules

Event Date:
2018-12-03T10:00:00
2018-12-03T11:00:00
Event Location:
Hennings 318
Speaker:
Ilia Tutunnikov, Weizmann Institute of Science, Israel
Related Upcoming Events:
AMO Seminars
Intended Audience:
Graduate
Local Contact:

Valery Milner

Event Information:

Orientation and alignment of molecules by ultrashort laser pulses is crucial for a variety of applications and have long been of interest in physics and chemistry, with the special emphasis on stereodynamics in chemical reactions and molecular orbitals imaging. As compared to the laser induced molecular alignment, which has been extensively studied and demonstrated, achieving molecular orientation is a much more challenging task, especially in the case of asymmetric-top molecules. Here, we report the experimental demonstration of all-optical field-free three-dimensional orientation of asymmetric-top molecules by means of phase-locked cross-polarized two-color laser pulse. This approach is based on nonlinear optical mixing process caused by the off-diagonal elements of the molecular hyperpolarizability tensor. It is demonstrated on SO2 molecules and is applicable to a variety of complex nonlinear molecules.

Nat. Commun, 2018 (in press) DOI: 10.1038/s41467-018-07567-2 

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Add to Calendar 2018-12-03T10:00:00 2018-12-03T11:00:00 All-optical Field-free Three-Dimensional Orientation of Asymmetric-Top Molecules Event Information: Orientation and alignment of molecules by ultrashort laser pulses is crucial for a variety of applications and have long been of interest in physics and chemistry, with the special emphasis on stereodynamics in chemical reactions and molecular orbitals imaging. As compared to the laser induced molecular alignment, which has been extensively studied and demonstrated, achieving molecular orientation is a much more challenging task, especially in the case of asymmetric-top molecules. Here, we report the experimental demonstration of all-optical field-free three-dimensional orientation of asymmetric-top molecules by means of phase-locked cross-polarized two-color laser pulse. This approach is based on nonlinear optical mixing process caused by the off-diagonal elements of the molecular hyperpolarizability tensor. It is demonstrated on SO2 molecules and is applicable to a variety of complex nonlinear molecules. Nat. Commun, 2018 (in press) DOI: 10.1038/s41467-018-07567-2    Event Location: Hennings 318