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; bSchool of Applied Mathematics, Central University of Finance and Economics, Beijing 100081, China; cOptical 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.
Received: 10 January 2007
Revised: 20 September 2007
Accepted manuscript online:
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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