CLF - Ultra




​​​The CLF's Ultra laser facility is housed with the Research Complex.

​Ultra uses a combination of kilohertz laser, detector and sample manipulation technology to study molecular dynamics (on the femtosecond to millisecond timescales) to address scientific problems in the physical and life sciences.  

A range of kilohertz ultrafast light sources provide multiple beams, multiple colours (UV to mid-IR), mixed timing patterns (fs-ms) and pulse length (40 fs, 50 fs, 120 fs, 2-3 ps, 0.8 ns and continuous wave).  Ultra has some of the world’s most sensitive time-resolved vibrational spectrometers used for investigations spanning from heterogeneous catalysis  to the dynamics of complex biological systems such as proteins.  Techniques include:-

  • 2DIR -  Femtosecond pump probe 2DIR​
  • TRIR -  Time resolved broadband IR spectroscopy 
  • TRMPS -  Time resolved multiple probe spectroscopy (spanning femtosecond to millisecond timescales on one instrument, UV - Mid IR)
  • Kerr Gate Raman -  Picosecond Raman with optical Kerr gate fluorescence suppression.
  • SSFG -  Broadband surface sum frequency generation  
  • Options on request for other non-linear spectroscopies such as Femtosecond Stimulated Raman, EVV, TR-2DIR etc   

A comprehensive range of diagnostic instrumentation and techni​ques are available. Ultra provides a flexible approach to experiments and can support equipment brought on site and there is access to the wide range of shared equipment available on the Harwell Campus.




Mike Towrie
Greg Greetham
Paul Donaldson
  • IR spectroscopy
  • Time-resolved studies
Emission or Reflection
  • Time-resolved studies
Photoelectron emission
  • Time-resolved studies
  • Inelastic scattering
  • Time-resolved scattering
  • Other - Chemistry
  • Other - Energy
  • Sustainable energy systems
Life Sciences & Biotech
  • Food quality and safety
  • Medicine
  • Molecular and cellular biology
  • Other - Life Sciences & Biotech
Material Sciences
  • Other - Material Sciences
  • Atomic & molecular physics
control/Data analysis
Control Software Type
  • Labview
Data Output Type
  • Binary and comma separated variable files.
Data Output Format
  • Comma separated variable data files. In house software for interferometric conversions and data sorting.
Softwares For Data Analysis
  • Data compatible with most spectral analysis tools, Origin, Python, Matlab etc