Using the characteristic of refractive index are smaller than 1 in the reststrahlen band,we can produce photonic crystal having forbidden band in the middle infrared and far infrared.
Incorporating array of metallic wires into the host media, such as ferrimagnet YIG under an external magnetic bias field, is a novel method to synthesize negative refractive index (NRI) material.
" In addition, refractive index can also be used to 'invisibility', for example, objects with high borosilicate glass materials can also be 'invisible' when moving in glycerol with a refractive index close to its own, " Chu noted.
The new glass he created was softer and easier to decorate, and had a higher refractive index, adding to its brilliance and beauty, and it proved invaluable to the optical industry.
This is actually one of the principles of realizing the " invisible cloak" , when the fabric of a garment and the air refractive index are the same, people can be freely " invisible" after wearing it, said the expert.
知利用材料在剩余射线带内折射率小于1
特性，我们
备出中红外区和
红外区存在禁带
晶体。
质的折射率很高，意味着光穿过它的速度会大幅降低。
折射率接近自身的甘油中运动时也可以‘隐形’，”褚指出。
丽，事实证明，它对光学工业来说是无价的。
