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Q: Fachverband Quantenoptik und Photonik
Q 16: Laser Developments and Applications
Q 16.5: Talk
Monday, March 11, 2019, 15:00–15:15, S SR 211 Maschb.
Towards an XUV frequency comb for precision spectroscopy of trapped highly charged ions — •Jan-Hendrik Oelmann, Janko Nauta, Alexander Ackermann, Julian Stark, Steffen Kühn, Thomas Pfeifer, and José Crespo López-Urrutia — Max-Planck-Institut für Kernphysik, Heidelberg, Germany
Highly charged ions (HCI) with only few tightly bound electrons have many interesting properties for probing fundamental physics and developing new frequency standards [1]. To perform high resolution spectroscopy of cold HCI in the extreme ultraviolet (XUV), we are developing a high-harmonic generation based XUV frequency comb [2]. To reach the required peak intensity levels (≈ 1013 W/cm2) at MHz repetition rates, laser pulses are first amplified to high power and then resonantly overlapped in a femtosecond enhancement cavity [3]. Recent progress and first results of intra-cavity multiphoton experiments are presented.
[1] M.S. Safronova et al., Phys. Rev. Lett. 113, 030801 (2014).
[2] G. Porat et al., Nat. Photon, 12, 387 - 391 (2018).
[3] J. Nauta et al., Nucl. Instrum. Meth. B 408, 285 (2017).