The new TimeGated® Raman technology broadens the application range of Raman to biosciences, geosciences and many others where the fluorescence emission has hindered successful Raman analyses.
The ‘Achilles’ heel’ of conventional Raman technology is the photoluminescence (including fluorescence, phosphorescence etc.). Photoluminescence is a competing phenomenon with Raman scattering and it can mask the whole Raman signal in the measured spectra, making the identification or quantification of materials impossible.
With new TimeGated® technology, we can now achieve Real Fluorescence Rejection.
How do we do this?
A patented combination of a sub-nanosecond (100 ps) laser excitation source and time-gated single photon counting array detector creates a totally new type of spectrometer able to acquire Raman spectra with real fluorescence rejection. The prompt Raman signal is acquired before significant fluorescence occurs. It also enables the acquisition of time-resolved fluorescence spectra by sequentially sampling the emission pulses at different temporal positions. This approach opens up two simultaneous windows for material characterization and gives valuable new information in several different application fields.
Apart from molecular structure information from Raman spectra, Timegated® technology can be used for time-resolved fluorescence spectroscopic applications to monitor molecular interactions and motions that occur in the picosecond-nanosecond range.
TimeGate Raman systems have multiple benefits: