<italic style="font-style: italic">In situ</italic> frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses

Rajendran Rajeev; Johannes Hellwagner; Anne Schumacher; Inga Jordan; Martin Huppert; Andres Tehlar; Bhargava Ram Niraghatam; Denitsa Baykusheva; Nan Lin; Aaron von Conta; Hans Jakob Wörner

doi:10.1038/lsa.2016.170

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In situ frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses

Original Articles

- In situ frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses
- Light: Science & Applications Vol. 5, Issue 4, (2016)
- Affiliations：
  
  Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, ETH Zurich, Zurich 8093, Switzerland
- Author bio：
  
  HJ Wörner, Email: hwoerner@ethz.ch
- Funds：
- DOI：10.1038/lsa.2016.170
  CLC：
- Published：2016-12，
  
  Published Online：03 June 2016，
  
  Received：14 January 2016，
  
  Revised：22 May 2016，
  
  Accepted：31 May 2016
- Accepted：
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Rajeev, R. et al. In situ frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses. Light: Science & Applications, 5, e16170 (2016).
DOI：

Rajeev, R. et al. In situ frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses. Light: Science & Applications, 5, e16170 (2016). DOI： 10.1038/lsa.2016.170.

摘要

Abstract

Monochromatization of high-harmonic sources has opened fascinating perspectives regarding time-resolved photoemission from all phases of matter. Such studies have invariably involved the use of spectral filters or spectrally dispersive optical components that are inherently lossy and technically complex. Here we present a new technique for the spectral selection of near-threshold harmonics and their spatial separation from the driving beams without any optical elements. We discover the existence of a narrow phase-matching gate resulting from the combination of the non-collinear generation geometry in an extended medium

atomic resonances and absorption. Our technique offers a filter contrast of up to 10

for the selected harmonics against the adjacent ones and offers multiple temporally synchronized beamlets in a single unified scheme. We demonstrate the selective generation of 133

80 or 56 nm femtosecond pulses from a 400-nm driver

which is specific to the target gas. These results open new pathways towards phase-sensitive multi

-pulse spectroscopy in the vacuum- and extreme-ultraviolet

and frequency-selective output coupling from enhancement cavities.

关键词

Keywords

beam splittingbelow-threshold harmonicscoherent extreme-ultraviolet pulsesfrequency gatingnon-collinear generation

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In situ frequency gating and beam splitting of vacuum- and extreme-ultraviolet pulses

DOI：10.1038/lsa.2016.170

摘要

Abstract

关键词

Keywords

references