Copper sulfate pentahydrate is investigated by terahertz time-domain spectroscopy. It is shown that the terahertz absorption coefficients are correlated with the particle size of the samples, as well as the heating ra...Copper sulfate pentahydrate is investigated by terahertz time-domain spectroscopy. It is shown that the terahertz absorption coefficients are correlated with the particle size of the samples, as well as the heating rates of the ambient temperature. Furthermore, the water molecules of copper sulfate pentahydrate can be quantitatively characterized due to the high sensitivity of the terahertz wave to water molecules. Based on such results, the status of water incorporated in mineral opal is also characterized using terahertz time-domain spectroscopy. It indicates that terahertz technology can be considered as an efficient method to detect the dehydration of minerals.展开更多
Optical operations have served as the basis of spectroscopy and imaging in terahertz regimes for a long time.Available lenses are practical tools for modulations.We fabricate a kind of biconvex lens from the natural d...Optical operations have served as the basis of spectroscopy and imaging in terahertz regimes for a long time.Available lenses are practical tools for modulations.We fabricate a kind of biconvex lens from the natural dolomite cluster.The lens works well at 0.1 THz based on the relatively high refractive index and low absorption coefficients.Compared with the lens fabricated by a dolomite stone,such a lens can focus dispersive terahertz beam efficiently in terahertz imaging systems,which indicates that natural minerals hold promising applications in terahertz optics.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.61805214)the Fundamental Research Funds for the Central Universities,China(Grant No.2652017142)
文摘Copper sulfate pentahydrate is investigated by terahertz time-domain spectroscopy. It is shown that the terahertz absorption coefficients are correlated with the particle size of the samples, as well as the heating rates of the ambient temperature. Furthermore, the water molecules of copper sulfate pentahydrate can be quantitatively characterized due to the high sensitivity of the terahertz wave to water molecules. Based on such results, the status of water incorporated in mineral opal is also characterized using terahertz time-domain spectroscopy. It indicates that terahertz technology can be considered as an efficient method to detect the dehydration of minerals.
基金Supported by the National Natural Science Foundation of China under Grant No 61805214the Fundamental Research Funds for the Central Universities under Grant No 2652017142
文摘Optical operations have served as the basis of spectroscopy and imaging in terahertz regimes for a long time.Available lenses are practical tools for modulations.We fabricate a kind of biconvex lens from the natural dolomite cluster.The lens works well at 0.1 THz based on the relatively high refractive index and low absorption coefficients.Compared with the lens fabricated by a dolomite stone,such a lens can focus dispersive terahertz beam efficiently in terahertz imaging systems,which indicates that natural minerals hold promising applications in terahertz optics.
