A Femtosecond Broadband Pump-Excitation/Depletion-Probe Spectrometer

Abstract

The invention relates to a femtosecond broadband pumping-excitation / eclipse-detection spectrometer. The spectrometer generates pumping light, detection light and excitation / eclipse light, the spectrometer can perform double chopping modulation on the pumping light, and the excitation / eclipse light, and can control the time sequence of the excitation / eclipse light and the detection light reaching asample, wherein the detection light is ultra-continuous detection pulse forming a magic angle with the polarization direction of the pumping light. In addition, the polarization directions of the pumping light, and the excitation / eclipse light are consistent. The spectrometer can be used for detecting and acquiring the spectrum signals of the broadband detection light under each corresponding time sequence for further studying the ultra-fast dynamic behaviors of sample molecules in different excitation state processes. Compared with the existing relevant study methods, the spectrometer provided by the invention has the characteristics that the time resolution is high; the functions are strong; the processes capable of being studies are wider, and the like. The physical and chemical reaction artificial quantum regulation and control can be realized; the technology belongs to one of the novel and effective detection technologies in the modern ultra-fast spectrum technology.

Description

technical field [0001] The invention relates to the field of photoelectric regulation and sensing technology, in particular to a femtosecond broadband pump-excitation / depletion-detection spectrometer. Background technique [0002] With the development of laser technology, people have developed a variety of ultrafast spectroscopy techniques to study the ultrafast process of molecules. Currently commonly used ultrafast spectroscopy techniques mainly include femtosecond fluorescence spectroscopy and femtosecond pump (pump)-probe (detection) spectroscopy, etc. These techniques have been found to have different limitations in application. Although femtosecond fluorescence spectroscopy has high detection accuracy, it can only detect luminescent materials, and can only detect the luminescence process of luminescent materials. Although the femtosecond broadband pump (pump)-probe (detection) spectroscopy technology can detect non-luminescent molecules and the dark state process of m...

AI Technical Summary

Problems solved by technology

Although femtosecond fluorescence spectroscopy has high detection accuracy, it can only detect luminescent materials, and can only detect the luminescent process of luminescent materials

Although the femtosecond broadband pump (pump)-probe (detection) spectroscopy technology can detect non-luminescent molecules and the dark state process of molecules with high time resolution, this method faces some difficulties in the detection of complex condensed phase systems. Need to be solved, such as: unable to solve the spectral overlap of complex molecular systems; unable to accurately detect the ultrafast intermediate process after the long-lived process in the complex dynamic process; unable to directly detect the whole process of the excited state dynamic process (such as unable to detect GSI, Excitondissociation and other intermediate processes); unable to perform selective quantum regulation, etc.

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