The FTIR lab at UCL is where many of the low-intensity, steady-state COMPASSS work is done, but also has the capability to perform time-resolved experiments over a wide range of frequencies. The equipment includes:

  • A high resolution continuous wave FTIR spectrometer (Bruker IFS 125HR), capable of a spectral resolution better than 0.01cm-1 over the frequency range 12 – 22000cm-1 (mm wave to blue light).
  • A step-scan FTIR spectrometer (Bruker Vertex 80v) capable of a time resolution down to 2.5nsec and a spectral resolution of 0.1cm-1, from far infrared (30cm-1) to blue light. Both spectrometers can be evacuated to eliminate atmospheric absorption.
  • A nsec-pulse tunable OPO laser with 3-5nsec pulses from 400nm to 2300um.
  • A psec-pulse tunable OPO and DFG laser with 25psec pulses from 690nm to 10um.
  • A selection of continuous-flow helium cryostats and (until April 2017) a dilution refrigirator capable of ~20mK, with a 3D, 2T vector magnet and optical windows.
  • A 1T electromagnet with polar and transverse optical access.

All spectrometers, lasers and cryostats can be coupled to each other for an array of time-resolved, low-temperature optical, electrical and magnetic measurements.