Influence of line defects on focusing in a two-dimensional photonic-crystal flat lens |
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Authors: | Feng Zhi-Fang |
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Institution: | Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract: | We investigate in detail the influence of line defects on
focusing of electromagnetic waves in a two-dimensional
photonic-crystal flat lens. Through simulations, we find that a
focusing can always be observed when a line defect in the lens is
introduced along the light transmission direction and the width of
the line defect is less than $\lambda /2$. However, there appear two
focusings when the width of the line defect is more than $\lambda
/2$. When the line defect is introduced along the direction
perpendicular to the transmission, there is always one focusing. |
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Keywords: | flat lens line defect photonic crysta |
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