A Transient Absorption Spectrometer with Ultra-high Time Resolution and Ultra-long Time Window
A transient absorption and spectrometer technology, applied in the field of spectrometers, can solve the problems of time resolution and measurement time window limitations, achieve the effect of eliminating the limitations of system time resolution and measurement time windows, avoiding data processing procedures, and reducing requirements
Active Publication Date: 2021-04-16
GUANGDONG UNIV OF TECH
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[0005] The purpose of the present invention is to provide a transient absorption spectrometer with ultra-high time resolution and ultra-long time window to solve the problem that the optical delay line in the existing transient absorption spectrometer limits the system time resolution capability and measurement time window
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[0026] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0027] The block diagram of the transient absorption spectrometer provided by the present invention is as figure 2 As shown, the transient absorption spectrometer specifically includes: a light source module 100, a beam splitter 200, two sets of optical delay lines 300, an optical lens group 400 (not shown in the figure) and a spectrometer 500;
[0028] Among them, one of the optical delay lines is a short-s...
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The invention discloses a transient absorption spectrometer, comprising: a light source module, a beam splitter, two sets of optical delay lines, an optical lens group, and a spectrometer; wherein, one of the optical delay lines is a short-stroke optical delay line for realizing Sub-10 femtosecond optical delay time resolution, and another long-travel optical delay line for achieving optical delay times greater than 16 nanoseconds. The laser beam emitted by the light source module is divided into pump light and probe light by the beam splitter. After the probe light is time-delayed by two sets of optical delay lines in series, the time-delayed probe light and pump light are passed through the optical lens group. Focusing on the sample to be tested, the probe light transmitted by the sample to be tested is collected by the spectrometer. The invention has the advantages of sub-10 femtosecond ultra-high time delay resolution and nanosecond ultra-long delay window, and eliminates the limitation of optical delay line on system time resolution ability and measurement time window in traditional commercial transient absorption spectrometers .
Description
technical field [0001] The invention relates to the technical field of spectrometers, in particular to a transient absorption spectrometer with ultra-high time resolution and ultra-long time window. Background technique [0002] Transient absorption spectrometer is an important scientific instrument, which is widely used in the fields of physics, chemistry, biology, materials and medicine. The specific research directions involved include chemical reaction kinetics, excited state relaxation, lattice relaxation kinetics, charge transfer and carrier recombination, etc. The schematic diagram of the basic structure of the existing commercial transient absorption spectrometer is as follows: figure 1 As shown, a beam of strong pump light is incident on the sample to excite the sample from the ground state to the excited state, while another beam of weak probe light (usually continuous white light) passes through the motorized translation stage to cause optical delay Afterwards, ...
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IPC IPC(8): G01J3/42G01J3/02
CPCG01J3/0205G01J3/42
Inventor 马琳聂兆刚
Owner GUANGDONG UNIV OF TECH