Cracks are accounted as the most destructive discontinuity in rock,soil,and concrete.Enhancing our knowledge from their ......

研究了二次谐波(SHW)是负折射率而基频光是正折射率的材料中,影响二次谐波转换效率的因素。根据考虑了走离效应、相位失配和振幅缓......