Antireflection coating for two-dimensional air hole-type photonic crystal negative refraction slab lens

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Abstract
We propose and optimize the antireflection coating composed of a row of tapered dielectric waveguides for two-dimensional air hole-type photonic crystal negative refraction slab lens. The image quality of the lens with the antireflection coating is improved. The simulation result using finite difference time domain method shows, at the working frequency leading to the effective index neff=-1, the reflection rate of the surface of photonic crystal with anti-reflection coating is reduced to below 1% in the range of incident angle less than 23 degrees.

Keywords:
photonic crystal /

negative refraction /

slab lens /

antireflection coating
Authors and contacts
Zhang Bo¹,

Wang Zhi²

(1)北京交通大学电子信息工程学院国家电工电子教学基地,北京 100044; (2)北京交通大学理学院光信息科学与技术研究所,北京 100044
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