Properties and applications of negative refractive index metamaterials

The negative refractive index materials NIM have become a reliable and promising technology. These technologies have special electromagnetic functions and characteristics that are not present in natural materials. They suffer from production difficulty, losses and are extremely dispersive due to their three dimension design and resonant properties. In this paper, the effect of negative refraction on physical laws were discussed briefly, also included a brief mention of some imsportant applications of this type of metamaterial.