1School of Criminal Science and Technology, People's Public Security University of China, Beijing 100038, China
International Journal of Physics.
2018,
Vol. 6 No. 2, 33-37
DOI: 10.12691/ijp-6-2-2
Copyright © 2018 Science and Education PublishingCite this paper: Yao Shen. Negative Refraction Slabs with Varying Indexed Metamaterial.
International Journal of Physics. 2018; 6(2):33-37. doi: 10.12691/ijp-6-2-2.
Correspondence to: Yao Shen, School of Criminal Science and Technology, People's Public Security University of China, Beijing 100038, China. Email:
shenyaophysics@hotmail.comAbstract
Negative refraction is a specific optical phenomenon made possible by a negative index material. A slab with negative refraction is an alternative to a normal lens. This type of lens is significantly superior to an ordinary lens. Negative refraction lenses with a single index −1 had been discussed by Pendry in recent decades. Our research focuses on an analytical and numerical method to demonstrate the optical properties and restrictions of negative refraction slabs with a gradient index. The position of focus changes depending on the incident angle. Different from normal varying indexed slab, we give the reason why the negative refraction slabs with varying index could not make a perfect lens. Only negative refraction slab with single index −1 could focus lights on one point, thus make a perfect lens.
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