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Chin. Phys. B, 2008, Vol. 17(3): 1101-1106    DOI: 10.1088/1674-1056/17/3/058
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Effect of the defect on the focusing in a two-dimensional photonic-crystal-based flat lens

Feng Zhi-Fang(冯志芳)a)†, Wang Xiu-Guo(王秀国)b),Li Zhi-Yuan(李志远)c), and Zhang Dao-Zhong(张道中)c)
a Beijing University of Chemical Technology, Beijing rm 100029, China; b School of Applied Mathematics, Central University of Finance and Economics, Beijing 100081, China; c Optical Physics Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract  We have investigated in detail the influence of defect on the focusing of electromagnetic waves in a two-dimensional photonic-crystal flat lens by using the finite-difference time-domain method. The result shows that many focusings can be observed at the symmetrical positions when a defect is introduced into the lens. Furthermore, the wave-guides in the lens can confine the transmission wave effectively and improve the quality of the focusing.
Keywords:  flat lens      defect      photonic crystal  
Received:  10 January 2007      Revised:  20 September 2007      Accepted manuscript online: 
PACS:  42.70.Qs (Photonic bandgap materials)  
  02.70.Bf (Finite-difference methods)  
  42.79.Bh (Lenses, prisms and mirrors)  
  42.79.Gn (Optical waveguides and couplers)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10704006), the Young Scholars Fund of Beijing University of Chemical Technology and the Supercomputing Centre, Computer Network Information centre, Chinese Academy of Sciences.

Cite this article: 

Feng Zhi-Fang(冯志芳), Wang Xiu-Guo(王秀国), Li Zhi-Yuan(李志远), and Zhang Dao-Zhong(张道中) Effect of the defect on the focusing in a two-dimensional photonic-crystal-based flat lens 2008 Chin. Phys. B 17 1101

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