Method and system for detecting crystal growth environment using terahertz time-domain spectroscopy

Abstract

The embodiment of the invention provides a method and system for detecting a crystal growth environment by using a terahertz time-domain spectroscopy technology. The method comprises the steps: selecting a crystal sample; testing nitrogen by using a terahertz time-domain spectroscopy system to obtain a terahertz time-domain waveform as a reference signal; placing the crystal sample on a clamping platform, changing the position of a light spot on the crystal sample through moving the position of a three-dimensional sample platform, and when terahertz waves vertically enter the center position of the crystal sample, obtaining a terahertz time-domain waveform taken as a testing signal of the crystal sample; performing Fourier transform on the reference signal and the testing signal to generate terahertz frequency-domain information of the reference signal and the testing signal; obtaining an absorption coefficient of the crystal sample according to the terahertz frequency-domain information of the reference signal and the testing signal, and further generating an absorbing graph of the crystal sample; and comparing difference in peak values and peak positions in the absorbing graph of the crystal sample, and distinguishing the growth environment of the crystal sample.

Description

technical field [0001] The invention relates to the detection field of crystal growth environment, in particular to a method and system for detecting crystal growth environment based on terahertz time-domain spectroscopy technology. Background technique [0002] Minerals and their crystals are products formed under certain natural conditions. In 1878, Gibbs first discovered the law of the growth and development of crystal planes, and established "crystal morphology". One of the achievements of modern mineralogy is the development of genetic mineralogy and mineral typology on the basis of advanced scientific and technological observation methods, which relate the crystallization habit and various physical and chemical properties of minerals to the geological environment in which they formed. The crystallography and crystal growth theory are used to analyze its origin and clarify the mineralization information revealed by the micromorphology. Different growth environment cond...

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Problems solved by technology

However, there are still deficiencies in each. For example, nuclear magnetic resonance spectroscopy requires that the nucleus must have nuclear magnetic properties, and only those electromagnetic radiation with the same energy as the nuclear spin level energy difference can be resonantly absorbed and other conditions; infrared absorption spectroscopy analysis method It has the disadvantages of large error and low sensitivity in quantitative analysis; in addition, some detection techniques have potential harm to human body and samples, and have disadvantages such as difficult operation and relatively long measurement time, so it is necessary to find a new method. spectroscopic techniques for the detection of crystalline substances

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