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Chin. Phys. B, 2013, Vol. 22(10): 104101    DOI: 10.1088/1674-1056/22/10/104101
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Flat lenses constructed by graded negative index-based photonic crystals with tuned configurations

Jin Lei (晋蕾)a, Zhu Qing-Yi (朱清溢)a, Fu Yong-Qi (付永启)a, Yu Wei-Xing (鱼卫星)b
a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
b State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Abstract  Flat lenses are designed by means of graded negative refractive index-based photonic crystals (PCs) constructed using air-holes tuned with different shapes. By gradually modifying the filling factor along the transverse direction, we obtain the graded negative index-based lenses for the purpose of focusing an incident plane wave. The finite-difference and time-domain (FDTD) algorithm is adopted for numerical calculation. Our calculation results indicate that these lenses can finely focus incident plane waves. Moreover, for the same size of air-holes, the focusing properties of the lens with rectangular air-holes are better than those with the other shaped air-holes. The graded negative index PCs lenses could possibly enable new applications in optoelectronic systems.
Keywords:  photonic crystals      graded negative index      focusing      flat lenses  
Received:  20 November 2012      Revised:  06 March 2013      Accepted manuscript online: 
PACS:  41.20.Jb (Electromagnetic wave propagation; radiowave propagation)  
  42.25.Bs (Wave propagation, transmission and absorption)  
  42.70.Qs (Photonic bandgap materials)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11079014, 61077010, 90923036, and 60977041) and the 100-Talent Program of the Chinese Academy of Sciences.
Corresponding Authors:  Fu Yong-Qi, Yu Wei-Xing     E-mail:  yqfu@uestc.edu.cn;yuwx@ciomp.ac.cn

Cite this article: 

Jin Lei (晋蕾), Zhu Qing-Yi (朱清溢), Fu Yong-Qi (付永启), Yu Wei-Xing (鱼卫星) Flat lenses constructed by graded negative index-based photonic crystals with tuned configurations 2013 Chin. Phys. B 22 104101

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