Intensity Effects in Ultracold Photoassociation Line Shapes
A Simoni, Paul S. Julienne, Eite Tiesinga, Carl J. Williams
We derive ultracold atom-atom photoassociation line shapes valid for intense light fields and investigate laser power effects in sodium and rubidium photoassociation to the purely long range 0g- symmetry state. We consider intensities up to few hundreds W/cm2, a strongly saturating intensity for typical transitions of experimental interest. For these intensities the 0g- rotational spectrum is still well resolved; however, it is essential to couple the photoassociation resonance to both s- and d-wave ground state channels. A low energy d-wave shape resonance can have a profound effect on the line shape. Understanding the line shape is essential for precision spectroscopic analysis and could improve the extraction of ground-state scattering properties such as scattering lengths.
Physical Review A (Atomic, Molecular and Optical Physics)
, Julienne, P.
, Tiesinga, E.
and Williams, C.
Intensity Effects in Ultracold Photoassociation Line Shapes, Physical Review A (Atomic, Molecular and Optical Physics)
(Accessed June 3, 2023)