Prof. Emanuel Fernandez de Lima Profile

Prof. Emanuel Fernandez de Lima

at Univ Federal de São Carlos

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Proceedings Article | 18 November 2013 Paper

Effects of rotation in the laser-pulse photoassociation in a thermal gas of atoms

Emanuel de Lima

Proceedings Volume 8785, 878527 (2013) https://doi.org/10.1117/12.2024968

KEYWORDS: Chemical species, Molecules, Molecular lasers, Control systems, Infrared lasers, Pulsed laser operation, Infrared radiation, Absorption, Scattering, Laser optics

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Photoassociation is a possible route for the formation of chemical bonds. In this process, the binding of colliding atoms can be induced by means of a laser field. Photoassociation has been studied in the ultracold regime and also with temperatures well above millikelvins in the thermal energy domain, which is a situation commonly encountered in the laboratory. A photoassociation mechanism can be envisioned based on the use of infrared pulses to drive a transition from free colliding atoms on the electronic ground state to form a molecule directly on that state. This work takes a step in this direction, investigating the laser-pulse-driven formation of heteronuclear diatomic molecules in a thermal gas of atoms including rotational effects. Based on the assumption of full system controllability, the maximum possible photoassociation yield is deduced. The photoassociation probability is calculated as a function of the laser parameters for different temperatures. Additionally, the photoassociation yield induced by subpicosecond pulses of a priori fixed shape is compared to the maximum possible yield.

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