Chiral molecule identification system and method based on frustrated total reflection light spin Hall effect
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A technology of frustrated total reflection and chiral molecules, applied in the field of material identification, which can solve the problems of only detecting gaseous substances, destroying samples, and incapable of quantitative description.
Pending Publication Date: 2022-05-17
CHENGDU UNIV OF INFORMATION TECH
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However, these technologies have their own limitations, such as only detecting gaseous substances...
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Embodiment 1
[0050] An optical spin Hall effect chiral molecule identification system based on frustrated total reflection, the optical path sequentially includes a pre-selection optical path, an enhanced chip structure, a post-selection optical path, and an electrical coupling element CCD;
[0051] The pre-selected optical path is used to adjust the intensity of the reflected light beam within the acceptable range of the receiving signal of the electrical coupling element CCD;
[0052] The enhanced chip structure is used to enhance the optical spin Hall effect of the reflected light beam;
[0053] The rear selection optical path is used to amplify the spin splitting of the light beam after being reflected by the enhanced chip structure and to collimate the reflected light;
[0054] The electrical coupling element CCD is used to locate the light spot and read the data of the received light intensity;
[0055] A standard cuvette is placed between the pre-selection optical path and the enha...
Embodiment 2
[0058] A method for the identification of chiral molecules based on the optical spin Hall effect based on frustrated total reflection, such as figure 2 shown, including the following steps:
[0059] S1. Construct an optical spin Hall effect chiral molecular identification system based on frustrated total reflection, and read the light intensity data;
[0060] In this embodiment, the identification system constructed in Embodiment 1 is adopted, and the specific method is as follows:
[0061] S11. Determine the concentration of the chiral molecule solution in the marked cuvette and the enhanced chip structure according to different materials;
[0062] Such as image 3 As shown, the beam spin lateral shift varies with the ratio η of the S-wave and P-wave reflection coefficients of the enhanced chip structure. The curves from top to bottom represent the specific rotation a of different substances, and its value ranges from 10°-90° °, arranged in an arithmetic sequence, from ...
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Abstract
The invention discloses a chiral molecule identification system based on the spinning Hall effect of frustrated total reflection light, which sequentially comprises a front selection light path, an enhanced chip structure, a rear selection light path and an electric coupling element CCD (Charge Coupled Device), the spinning Hall effect of light is enhanced through the light paths, so that the CCD can capture a light spot and can read a spinning transverse movement value, and the spinning transverse movement value can be detected through the enhanced chip structure. Meanwhile, the invention provides a chiral molecule identification method based on the frustrated total reflection light spin Hall effect, the optical spin transverse movement value in the light intensity data is read by the identification system, the optical rotation angle is solved according to the optical spin transverse movement value, then the specific rotation of the chiral molecule solution is solved through the calculated optical rotation angle, and the chiral molecule is identified through the chiral molecule identification method based on the frustrated total reflection light spin Hall effect. And obtaining the category of the corresponding molecular material according to the calculated specific rotation of the chiral molecular solution. The method is suitable for identifying all chiral molecular solutions.
Description
technical field [0001] The invention relates to the field of material identification, in particular to a system and method for identifying chiral molecules based on the frustrated total reflection optical spin Hall effect. Background technique [0002] Chirality refers to the property that an object cannot be superimposed on its mirror image, and a chiral substance and its mirror image are called chiral enantiomers. Chiral molecules refer to molecules whose objects and their mirror images cannot be superimposed on each other and have a certain configuration or conformation. Chiral molecules widely exist in nature and living organisms, and play an important role in research fields such as pharmacology, chemical synthesis, and life sciences. Due to the common chemical and physical properties of left-handed molecules and right-handed molecules, it is very difficult to detect them. The existing chiral analysis technologies mainly include: piezoelectric and optical gas sensors,...
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