Picosecond Transient Absorption Spectroscopy System

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Picosecond Transient Absorption Spectroscopy System picoTAS

picoTAS can measure wide time range including "Gap Time Region" (1–20 nanosecond) in conventional transient absorption methods by using newly developed RIPT method (Randomly Interleaved Pulse Train method).
In addition, picoTAS has a capability of eliminating the influence of fluorescence.
Therefore, picoTAS can measure many photo-induced reactions which never have been observed, and new research opportunities will be opened up by exploring those phenomena.

picoTAS graph 1
picoTAS graph 2


  • Complete coverage of gap time region (1 ns–20 ns)
  • Broadband wavelength range from VIS to NIR
  • Transient absorption measurement from 100 picosecond to millisecond
  • Removal of fluorescence signal
  • Compact size, Optical bench is not required (-ns model)


  • Observation of Transient Absorption Spectra of Excited Singlet/Triplet State
  • Measurement of Intersystem Crossing (ISC) Rate
  • Research of Electron Transfer, Charge Separation/Recombination Dynamics
  • Observation of Intermolecular Reaction, Excimer Generation etc.
  • Analysis of Dynamics of Artificial Photosynthesis, Solar Energy Cell, Organic EL
MethodRIPT method (Randomly Interleaved Pulse Train method)
Time Resolution (10%–90% rise time)<400 ps<100 ps
Delay Time resolution10 ps, 20 ps, 50 ps, 100 ps, 200 ps, 500 ps, 1 ns, 2 ns, 5 ns, 10 ns, 20 ns
Full scale100 ns–2 ms
Wavelength Range410–1600 nm
Automatic Controlwavelength scan, light intensity adjustment, shutter control
Sample Holdersolution (optical path length is 2 mm), thin film
Pump Light SourceSourcepassive Q-SW microchip laserpicosecond mode-locked laser
Wavelength532 nm and/or 355 nm532 nm and/or 355 nm and/or 266 nm
Pulse Width<350 ps<25 ps
Pulse Energy>20 µJ>80 µJ
Repetition Rate100–1000 Hz (variable)1000 Hz
Probe Light SourceSourcepicosecond Supercontinuum Light Source
Pulse Width<50–100 ps (dependent on wavelength)
Repetition Rate20 MHz ± 5%
PC & SoftwareOSWindows® 7/10
FunctionAutomatic reconstruction of transient absorption temporal profile, curve fitting (nonlinear least square method), data storage in text format
Installation Environmentno optical bench requiredon optical bench

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