Time-Correlated Single Photon Counting时间相关单光子计数

Time-resolved fluorescence spectroscopy is a powerful analysis tool in fundamental physics as well as in the life sciences. Implementing it in the time domain requires recording the time dependent intensity profile of the emitted light upon excitation by a short flash of light, typically a laser pulse. While in principle, one could attempt to record the time decay profile of the signal from a single excitation-emission cycle, there are practical problems preventing such a simple solution in most cases.