仿海豚皮减阻研究进展

减阻材料可广泛应用于国防、工业、生产生活,具有极大的应用价值。而仿生减阻作为减阻研究新的分枝,受到广泛关注。由Gray计算海豚游动阻力与肌肉力量不匹配而产生的“Gray悖论”开启了对海豚减阻机理的探索。本文介绍了基于海豚表皮的几种减阻机理,并介绍由其发展出的相应减阻材料的设计与测试,最后对仿海豚皮减阻研究的未来发展进行展望。     

Enhanced THz Radiation from Spatially Inhomogeneous Fields

Nonlinear terahertz(THz) radiation from gas media usually relies on the asymmetric laser-induced current produced by ultra-intense two-color laser fields with a specific phase delay. Here a new scheme is proposed and theoretically investigated, in which the radiation is generated by spatially inhomogeneous fields induced by relatively low-intensity monochromatic lasers and an array of single triangular metallic nanostructures. Our simulations are based on the classical photocurrent model and the...