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Article Dans Une Revue Physical Review Applied Année : 2020

Trapping, cooling, and photodissociation analysis of state-selected H$_2^+$ ions produced by (3+1) multiphoton ionization

Résumé

We report on the production of cold, state-selected H$_2^+$ molecular ions in a linear RF trap. The ions are produced by (3+1) resonance-enhanced multi-photon ionisation (REMPI) of H$_2$, and sympathetically cooled by laser-cooled Be$^+$ ions. After demonstrating and characterizing the REMPI process, we use photodissociation by a deep UV laser at 213~nm to verify the high vibrational purity of the produced H$_2^+$ ion samples. Moreover, the large difference between the photodissociation efficiencies of ions created in the $v=0$ and $v=1$ levels provides a way to detect a $v=0 \to 1$ transition. These results pave the way towards high-resolution vibrational spectroscopy of H$_2^+$ for fundamental metrology applications.
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Dates et versions

hal-02561042 , version 1 (02-05-2020)
hal-02561042 , version 2 (25-08-2020)

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Julian Schmidt, Thomas Louvradoux, Johannes M Heinrich, Nicolas Sillitoe, Malcolm Simpson, et al.. Trapping, cooling, and photodissociation analysis of state-selected H$_2^+$ ions produced by (3+1) multiphoton ionization. Physical Review Applied, 2020, 14 (2), ⟨10.1103/PhysRevApplied.14.024053⟩. ⟨hal-02561042v2⟩
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