摘要：For isotropic dielectric thin films, polarization effect is an inherent characteristic. As it will make the performance of optical-electric system go to bad, such polarization-dependent properties are often intolerable and should be eliminated in many applications. In this paper, based on a micro- and nano-optical structure whose period consists of four parts, a polarization insensitive filter is obtained by combining rigorous wave theory and multi-objective immune optimization algorithm. Its working wavelength is 1315 nm which is often used in laser systems. The results of our design show that TE and TM polarized waves have reflectivities of 0.482 and 0.485, respectively at designed wavelength of 1315 nm. And it denotes that two values are both close to the design values, their difference is only 0.003, and polarization deviation is also very little. Therefore, the designed filter can eliminate the effect of polarization deviation very well at 1315 nm wavelength.

摘要：过渡金属氧化物(TMOs)用作电极材料时,会在循环过程中产生严重的体积变化,并且其自身的导电率也较低,因此它的电化学性能较差.设计和开发独特的TMOs纳米结构并将其与导电碳基底相结合是改善其电化学性能的有效策略.本工作中,我们设计了一种C/Cu多孔微球,并通过原位合成在碳壁上垂直生长Co_(3)O_(4)纳米片.作为导电基底,C/Cu多孔微球提供了多尺度孔隙网络和大的电极/电解质接触界面,显著改善了电子和离子扩散动力学.原位合成的Co_(3)O_(4)纳米片牢牢地固定在碳壁上,从而提高了复合微球在长期循环中的结构稳定性.得益于独特的结构特征,用作锂离子电池负极材料的C/Cu@Co_(3)O_(4)复合多孔微球表现出优异的倍率性能、高充电比容量和出色的循环稳定性.