Polymeric nitrogen and polynitrogen are believed to be high-energy-density materials. Studies have been conducted to reduce synthesis pressure and improve polymeric nitrogen stability by introducing other elements. However, all patterns of the polymeric nitrogen are negatively charged or covalent bonds are formed between introduced elements and nitrogen atoms by high pressure methods. More research is needed to understand the effects of charge transfer on polymeric nitrogen patterns.
Severe irradiation environment would bring damage to the microstructure of the materials and affect the stable operation and tritium recovery of fusion reactor. Therefore, the efficient tritium production from tritium breeding materials is the guarantee for the realization of tritium self-sufficiency in fusion reactor.
Terahertz (THz, 1011~1013 Hz) related technology, due to its superior spectral performance, possesses wide application potential in communication, security, sensing fields and so on. Its engineering applications highly depend on a variety of THz components.
Ocean color is hard to be observed as the solar radiation on the ocean surface is only about 30% of the total radiation after being attenuated by the atmosphere, and only visible light can be transmitted to the water. Besides, water column exhibits a depth-exponential decay signal at different rates at each wavelength. Therefore, imaging spectrometers, with broad spectrum and high spectral and spatial resolution, are required.
Recently, researchers from the Institute of Solid State Physics, Hefei Institutes of physical science, Chinese Academy of Sciences revealed the mechanism of the far/near-field and angular radiation distribution of the dipole-multipole (D-M) coupling system.