Trapped ultracold molecular ions: candidates for an optical molecular clock for a fundamental physics mission in space

B. Roth; J. Koelemeij; H. Daerr; I. Ernsting; S. Jorgensen; M. Okhapkin; A. Wicht; A. Nevsky; S. Schiller

doi:10.1117/12.2308072

21 November 2017 Trapped ultracold molecular ions: candidates for an optical molecular clock for a fundamental physics mission in space

B. Roth, J. Koelemeij, H. Daerr, I. Ernsting, S. Jorgensen, M. Okhapkin, A. Wicht, A. Nevsky, S. Schiller

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Proceedings Volume 10567, International Conference on Space Optics — ICSO 2006; 105672X (2017) https://doi.org/10.1117/12.2308072
Event: International Conference on Space Optics 2006, 2006, Noordwijk, Netherlands

Abstract

Narrow ro-vibrational transitions in ultracold molecules are excellent candidates for frequency references in the near-IR to visible spectral domain and interesting systems for fundamental tests of physics, in particular for a satellite test of the gravitational redshift of clocks. We have performed laser spectroscopy of several ro-vibrational overtone transitions υ = 0 → υ = 4 in HD⁺ ions at around 1.4 μm. 1+1 REMPD was used as a detection method, followed by measurement of the number of remaining molecules. The molecular ions were stored in a linear radiofrequency trap and cooled to millikelvin temperatures, by sympathetic cooling using laser-cooled Be⁺ ions simultaneously stored in the same trap.

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B. Roth, J. Koelemeij, H. Daerr, I. Ernsting, S. Jorgensen, M. Okhapkin, A. Wicht, A. Nevsky, and S. Schiller "Trapped ultracold molecular ions: candidates for an optical molecular clock for a fundamental physics mission in space", Proc. SPIE 10567, International Conference on Space Optics — ICSO 2006, 105672X (21 November 2017); https://doi.org/10.1117/12.2308072

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KEYWORDS

Ions

Spectroscopy

Crystals

Molecular spectroscopy

Clocks

Molecules

Beryllium

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