Direct frequency-comb-driven raman transitions in the terahertz range

Solaro, Cyrille

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https://hdl.handle.net/2142/100731 Copy

Description

Title

Direct frequency-comb-driven raman transitions in the terahertz range

Author(s)

Solaro, Cyrille

Contributor(s)

• Drewsen, Michael
• DePalatis, Michael
• Fisher, Karin
• Meyer, Steffen

Issue Date

2018-06-18

Keyword(s)

Mini-symposium: Frequency-Comb Spectroscopy

Abstract

I will present our recent results on the use of a femtosecond frequency comb to coherently drive stimulated Raman transitions between terahertz-spaced atomic energy levels [1]. More specifically, we address the 3d 2D3/2 and 3d 2D5/2 fine structure levels of a single trapped 40Ca+ ion and spectroscopically resolve the transition frequency with a relative accuracy of 5.5×10−12 ! The achieved accuracy is nearly a factor of five better than the previous best Raman spectroscopy [2], and is currently limited by the inaccuracy of our atomic clock reference. Using direct frequency comb Raman spectroscopy on four other isotopes 42,44,46,48Ca+, in combination with precise measurements of the 4s 2S1/2 − 3d 2D5/2 transition, we were also able to improve bounds on new physics beyond the standard model [3,4]. Furthermore, I will discuss the population dynamics of frequency-comb-driven Raman transitions which can be fully predicted from the spectral properties of the femtosecond frequency comb. We achieved Rabi oscillations with a contrast of 99.3(6)% and milliseconds coherence time (see figure)! The technique can be easily generalized to transitions in the subkHz [5] to tens of THz range and should be applicable for driving, e.g., spin-resolved rovibrational transitions in molecules and hyperfine transitions in highly charged ions. [1] C. Solaro et al. arXiv:1712.07429 (2017) [2] R. Yamazaki et al. PRA 77,012508 (2008) [3] S. Meyer et al. in preparation [4] J.C. Berengut et al. arXiv:1704.05068 (2017) [5] D. Hayes et al. PRL 104,140501 (2010)

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100731

DOI

10.15278/isms.2018.MG05

Copyright and License Information

Copyright 2018 Cyrille Solaro

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