与之相比,在自然界发现的所有材料都具有一个正折射率(positive refractive index),这是用来衡量电磁波从一种前言进入另外一种前言时,光线被屈曲的程度的一种要领。
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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。
Compared with the case of positive refractive index structural defects, the influence of the interaction between defects on defect modes is stronger, the spectrum-width of defect mode is broader.
与正折射率缺陷情形相比较,负折射率缺陷间的相互作用对缺陷模的影响更大,局域模谱线更宽。
Dr Hess envisages a ray of light travelling down an optical fibre made from two materials: a core with a negative refractive index and an outer sheath with a positive one.
赫斯博士构想出一个画面,即一道光正穿越于一个由两种材料制作的光导纤维,一种是具有正折射指数的纤维核,另一种则是具有正折射指数的外围。
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