4. Femto-second time-resolved transient fluorescence spectrometer: from 1 noncoherent fluorescence photon to 106 laser photons.

We have developed a highly-sensitive, high-temporal resolution transient fluorescent spectrometer based on a single-photon noncollinear optical parametric amplification technique, which clones a single non-coherent fluorescent photon to 1.2×106 photons, furthermore it converts a near IR photon which is difficult to be detected due to lack of the sensitive detector in this spectral region to the visible region. We realized an accessible detection limit of 15 photons within a 150 fs gating pulse, considering the limitation of the polarization, this limit can be set as 8 photons.


Group 06, Laboratory of Soft Matter Physics, The Institute of Physics, Chinese Academy of Sciences
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