Intensity effects in ultracold photoassociation line shapes
Intensity effects in ultracold photoassociation line shapes
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DOI：
10.1103/physreva.66.063406
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发表时间：
2002-12
影响因子：
2.9
通讯作者：
A. Simoni;P. Julienne;E. Tiesinga;Carl J. Williams
中科院分区：
文献类型：
--
作者：
A. Simoni;P. Julienne;E. 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 ${0}_{g}^{\ensuremath{-}}$ symmetry state. We consider intensities up to a few hundreds ${\mathrm{W}/\mathrm{c}\mathrm{m}}^{2},$ a strongly saturating intensity for typical transitions of experimental interest. For these intensities the ${0}_{g}^{\ensuremath{-}}$ 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.
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 ${0}_{g}^{\ensuremath{-}}$ symmetry state. We consider intensities up to a few hundreds ${\mathrm{W}/\mathrm{c}\mathrm{m}}^{2},$ a strongly saturating intensity for typical transitions of experimental interest. For these intensities the ${0}_{g}^{\ensuremath{-}}$ 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.