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Title: CITIUS: An infrared-extreme ultraviolet light source for fundamental and applied ultrafast science

We present the main features of CITIUS, a new light source for ultrafast science, generating tunable, intense, femtosecond pulses in the spectral range from infrared to extreme ultraviolet (XUV). The XUV pulses (about 10{sup 5}-10{sup 8} photons/pulse in the range 14-80 eV) are produced by laser-induced high-order harmonic generation in gas. This radiation is monochromatized by a time-preserving monochromator, also allowing one to work with high-resolution bandwidth selection. The tunable IR-UV pulses (10{sup 12}-10{sup 15} photons/pulse in the range 0.4-5.6 eV) are generated by an optical parametric amplifier, which is driven by a fraction of the same laser pulse that generates high order harmonics. The IR-UV and XUV pulses follow different optical paths and are eventually recombined on the sample for pump-probe experiments. We also present the results of two pump-probe experiments: with the first one, we fully characterized the temporal duration of harmonic pulses in the time-preserving configuration; with the second one, we demonstrated the possibility of using CITIUS for selective investigation of the ultra-fast dynamics of different elements in a magnetic compound.
Authors:
; ; ;  [1] ;  [2] ; ;  [3] ;  [4] ;  [3] ;  [5] ; ; ;  [6] ;  [7] ;  [8] ;  [3] ;  [9] ; ;  [10] ;  [11] more »;  [1] « less
  1. Laboratory of Quantum Optics, University of Nova Gorica, Nova Gorica (Slovenia)
  2. (Italy)
  3. Elettra Sincrotrone Trieste, Trieste (Italy)
  4. Sapienza University, Rome (Italy)
  5. (CNR-IMIP), Montelibretti, Roma (Italy)
  6. Institute of Photonics and Nanotechnologies (CNR-IFN), Padova (Italy)
  7. Kontrolni Sistemi d.o.o., Sežana (Slovenia)
  8. Institute of Materials Manufacturing (CNR-IOM), TASC Laboratory, Trieste (Italy)
  9. (France)
  10. Laboratory of Mechanical Processing Technologies, University of Ljubljana, Ljubljana (Slovenia)
  11. Institute of Organic Synthesis and Photoreactivity (CNR-ISOF), Ferrara (Italy)
Publication Date:
OSTI Identifier:
22253513
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; EXTREME ULTRAVIOLET RADIATION; HARMONIC GENERATION; HARMONICS; LASERS; LIGHT SOURCES; PARAMETRIC AMPLIFIERS; PROBES; PULSES