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A simple and comprehensive electromagnetic theory uncovering complete picture of light transport in birefringent crystals
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作者 ianbo Pan Jianfeng Chen +2 位作者 Lihong Hong Li Long Zhi-Yuan Li 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第5期294-304,共11页
Birefringence production of light by natural birefringent crystal has long been studied and well understood.Here,we develop a simple and comprehensive rigorous electromagnetic theory that allows one to build up the co... Birefringence production of light by natural birefringent crystal has long been studied and well understood.Here,we develop a simple and comprehensive rigorous electromagnetic theory that allows one to build up the complete picture about the optics of crystals in a friendly way.This theory not only yields the well-known refraction angle and index of ellipse for birefringence crystal,but also discloses many relevant physical and optical quantities that are rarely studied and less understood.We obtain the reflection and transmission coefficient for amplitude and intensity of light at the crystal surface under a given incident angle and show the electromagnetic field distribution within the crystal.We derive the wavefront and energy flux refraction angle of light and the corresponding phase and ray refractive index.We find big difference between them,where the phase refractive index satisfies the classical index of ellipse and Snell’s law,while the ray refractive index does not.Moreover,we disclose the explicit expressions for the zero-reflection Brewster angle and the critical angle for total internal reflection.For better concept demonstration,we take a weak birefringent crystal of lithium niobate and a strong birefringent crystal tellurium as examples and perform simple theoretical calculations.In addition,we perform experimental measurement upon z-cut lithium niobate plate and find excellent agreement between theory and experiment in regard to the Brewster angle.Our theoretical and experimental results can help to construct a clear and complete picture about light transport characteristics in birefringent crystals,and may greatly facilitate people to find rigorous solution to many light-matter interaction processes happening within birefringent crystals,e.g.,nonlinear optical interactions,with electromagnetic theory. 展开更多
关键词 birefringence crystal comprehensive solution complete physical picture
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CRESDA Successfully Processed the First Track Data of GF-3
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作者 China Center For Resources Satellite Data and Application 《Aerospace China》 2016年第3期51-53,共3页
The first images obtained from Gaofen-3(GF-3),China’s first C-band high-resolution Synthetic Aperture Radar(SAR)satellite with a resolution of one meter in spatial diameter were published on August 25.This satell... The first images obtained from Gaofen-3(GF-3),China’s first C-band high-resolution Synthetic Aperture Radar(SAR)satellite with a resolution of one meter in spatial diameter were published on August 25.This satellite undertakes an important task with its all-day,all-weather observation capability as part of the China High-resolution Earth Observation System(CHEOS).With 12 imaging modes, 展开更多
关键词 weather Observation picture Figure covering minutes processed launch completed texture
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