When the absorption is weak, the lateral shift for the composites with positiverefraction will exhibit a positive displacement.
而当介质的吸收较弱时，正折射材料表面的古斯-汉欣位移才会出现正位移。
2
They then cascaded the negative index medium with a positive refractive index medium so that the complete nanostructure behaved as one with an index of refraction of zero.
他们将负折射率材料和正折射率材料级联起来成功实现了零折射率行为的纳米结构。
3
Recent experiments that demonstrate the negative refraction of light has led a hot scientific debate to a close, and will bring the negative-index material a positive future.