Device and method of detection time-resolved transient absorbance spectrum

A technology of transient absorption and detection time, applied in absorption/scintillation/reflection spectroscopy, measuring devices, spectrometry/spectrophotometry/monochromator, etc., can solve the problem of inability to obtain transient absorption spectra with weak absorbance Signal and other problems, to reduce the background scattered light signal, realize the intensity, improve the effect of detection signal-to-noise ratio

Active Publication Date: 2016-09-21
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

[0008] An object of the present invention is to provide a device for detecting time-resolved transient absorption spectrum, which is used to solve the problem that the existing equipment cannot obtain transient absorption spectrum signals with weak absorbance, that is, to effectively extract the transient state in the background of strong scattered light Absorbing spectral signals, further suppressing technical problems in the frequency domain

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  • Device and method of detection time-resolved transient absorbance spectrum
  • Device and method of detection time-resolved transient absorbance spectrum
  • Device and method of detection time-resolved transient absorbance spectrum

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[0064] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0065] In one embodiment, such as figure 1 As shown, a device for detecting time-resolved transient absorption spectra, comprising:

[0066] The pump unit is used to emit pulsed laser light to pump and excite the sample to be tested;

[0067] The detection unit is used to emit a broad-spectrum detection beam to irradiate the area of ​​the sample to be tested excited by the pump;

[0068] The analysis unit is used to analyze the change of the absorbance and absorption spectrum of the broad-spectrum probe beam before and a...

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Abstract

The invention provides a device of detection time-resolved transient absorbance spectrum. The device includes a pumping unit, a detection unit, and an analysis unit. The pumping unit is used for emitting pulse laser to pump and stimulate the sample to be measured. The detection unit is used for emitting wide spectrum detection beam to irradiate the pumped and stimulated area of the sample to be measured. The analysis unit is used for analyzing the changes of the absorption spectrum and absorbancy of the wide spectrum detection beam of the sample to be measured before and after suffering pumping and stimulating. The detection unit comprises a light intensity or phase modulator, and the analysis unit comprises an optical filter and a lock-in amplifier.

Description

technical field [0001] The invention relates to a device and method for detecting time-resolved spectra. More specifically, it relates to a device and method for detecting time-resolved transient absorption spectra. Background technique [0002] A common technique for detecting time-resolved transient absorption spectra is flash photolysis (Flash Photolysis), the principle of which was proposed in the 1950s. With the emergence and further development of lasers, the intensity of the detected absorbance signal has been significantly improved. , and the time resolution scale reaches the nanosecond or even femtosecond level, thus providing an experimental research method for studying ultrafast processes such as photochemistry and photophysics. When the molecule is excited by light, the electrons transition from the ground state (steady state) to the excited state (unsteady state), and with the decay of the excited state, a series of changes and reactions will occur, including t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01J3/42
CPCG01J3/42G01J2003/423G01N21/31
Inventor 陆珩孟祥敏
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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