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Influence of unit cell rotated on the focusing in a two-dimensional photonic-crystal-based flat lens

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4 Author(s)
Feng, Zhifang ; Beijing University of Chemical Technology, Beijing 100029, China ; Wang, Xiuguo ; Li, Zhiyuan ; Zhang, Daozhong

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2745374 

Focusing in photonic crystal (PC) slab has been studied theoretically and experimentally. PCs are composed of a unit cell repeated periodically. In this article, we investigate in detail the influence of the continuous rotation of the unit cell on the focus in a two-dimensional photonic-crystal-based flat lens by the finite-difference time-domain method and experimental measurement. It is found that the focusing can appear within a large range of rotated angle of the unit cell. When the rotation exceeds a certain angle, the focusing disappears. However, it is interesting that the focusing does not depart from the symmetric center because of rotation of the unit cell.

Published in:

Journal of Applied Physics  (Volume:101 ,  Issue: 12 )

Date of Publication:

Jun 2007

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