Hannover 2013 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 58: Precision measurements and metrology V
Q 58.3: Talk
Friday, March 22, 2013, 11:30–11:45, E 001
Coherence transfer for the generation of x-ray frequency combs — •Stefano M. Cavaletto1, Zoltán Harman1,2, Christian Buth3, and Christoph H. Keitel1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2ExtreMe Matter Institute (EMMI), Darmstadt, Germany — 3Argonne National Laboratory, Argonne, IL, USA
Optical frequency combs had a revolutionary impact on precision spectroscopy and metrology. The spectrum of a frequency comb, consisting of evenly spaced lines, is the result of an infinite train of femtosecond pulses produced in a mode-locked ultrafast laser. Recently, frequency-comb technology was extended to the extreme-ultraviolet spectral regime via high-harmonic generation in a femtosecond-enhancement cavity [1]. We propose an optical scheme to transfer the coherence of a driving, optical frequency comb to the radiation emitted by transitions of higher frequencies. The comb structure we predict in the emitted x-ray spectrum might eventually represent an alternative scheme for x-ray-comb generation, able to overcome the frequency limitations of present HHG-based methods.
[1] A. Cingöz et al., Nature 482, 68 (2012).