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Interrogating the Temporal Coherence of EUV Frequency Combs with Highly Charged Ions

MPS-Authors
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Lyu,  Chunhai
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Cavaletto,  Stefano M.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

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Keitel,  Christoph H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Harman,  Zoltan
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Citation

Lyu, C., Cavaletto, S. M., Keitel, C. H., & Harman, Z. (2020). Interrogating the Temporal Coherence of EUV Frequency Combs with Highly Charged Ions. Physical Review Letters, 125(9): 093201. doi:10.1103/PhysRevLett.125.093201.


Cite as: https://hdl.handle.net/21.11116/0000-0007-60B6-F
Abstract
A scheme to infer the temporal coherence of EUV frequency combs generated from intracavity high-order harmonic generation is put forward. The excitation dynamics of highly charged Mg-like ions, which interact with EUV pulse trains featuring different carrier-envelope-phase fluctuations, are simulated. While demonstrating the microscopic origin of the macroscopic equivalence between excitations induced by pulse trains and continuous-wave lasers, we show that the coherence time of the pulse train can be determined from the spectrum of the excitations. The scheme will provide a verification of the comb temporal coherence at timescales several orders of magnitude longer than current state of the art, and at the same time will enable high-precision spectroscopy of EUV transitions with a relative accuracy up to
δ
ω
/
ω

10−17
.