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Negative refraction and focusing of electromagnetic wave through two-dimensional photonic crystals |
ZHANG Xiang-dong |
Department of Physics, Beijing Normal University, Beijing 100875, China |
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Abstract The negative refraction of electromagnetic waves in photonic crystals was recently demonstrated experimentally, and the physical properties were analyzed. Microsuperlenses based on two-dimensional photonic crystals were designed and the subwavelength images were observed. In this review, after providing a brief history of the research related to the above phenomena, we will summarize our research works in this field including the method of creating a negative refraction region, generating an absolute negative refraction, the focusing of unpolarized electromagnetic waves, and the effect of interface and disorder on the image by the two-dimensional photonic crystal flat lens. The discussion on the negative refraction and the focusing by high symmetric quasicrystals is also presented.
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Issue Date: 05 December 2006
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