Challenges of laser-cooling molecular ions

Jason H.V. Nguyen, C. Ricardo Viteri, Edward G. Hohenstein, C. David Sherrill, Kenneth R. Brown, Brian Odom*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

74 Scopus citations


The direct laser cooling of neutral diatomic molecules in molecular beams suggests that trapped molecular ions can also be laser cooled. The long storage time and spatial localization of trapped molecular ions provides an opportunity for multi-step cooling strategies, but also requires careful consideration of rare molecular transitions. We briefly summarize the requirements that a diatomic molecule must meet for laser cooling, and we identify a few potential molecular ion candidates. We then carry out a detailed computational study of the candidates BH+ and AlH+, including improved ab initio calculations of the electronic state potential energy surfaces and transition rates for rare dissociation events. On the basis of an analysis of the population dynamics, we determine which transitions must be addressed for laser cooling, and compare experimental schemes using continuous-wave and pulsed lasers.

Original languageEnglish (US)
Article number063023
JournalNew Journal of Physics
StatePublished - Jun 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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