Rotational State Analysis of AlH+ by Two-Photon Dissociation

Abstract

We perform ab-initio calculations needed to predict the cross-section of an experimentally accessible (1+1') resonance-enhanced multiphoton dissociation (REMPD) pathway in AlH+. Experimenting on AlH+ ions held in a radiofrequency Paul trap, we confirm dissociation via this channel with analysis performed using time-of-flight mass spectrometry. We demonstrate the use of REMPD for rotational state analysis, and we measure the rotational distribution of trapped AlH+ to be consistent with the expected thermal distribution. AlH+ is a particularly interesting species for ion trap work because of its electronic level structure, which makes it amenable to proposals for rotational optical pumping, direct Doppler cooling, and single-molecule fluorescence detection. Potential applications of trapped AlH+ include searches for time-varying constants, quantum information processing, and ultracold chemistry studies.

References in corpus (6)

• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• Stability of the proton-to-electron mass ratio
• Using Molecules to Measure Nuclear Spin-Dependent Parity Violation
• Enhanced sensitivity to variation of $m_e/m_p$ in molecular spectra
• Challenges of laser-cooling molecular ions
• State-specific detection of trapped HfF${}^{+}$ by photodissociation

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• Photodissociation spectra of single trapped CaOH+ molecular ions
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