Negative refraction and superlens behavior in a two-dimensional photonic crystal

Date
2005
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Source Title
Physical Review B: Covering Condensed Matter and Materials Physics
Print ISSN
2469-9950
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Publisher
American Physical Society
Volume
71
Issue
8
Pages
085106-1 - 085106-5
Language
English
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Abstract

We experimentally and theoretically studied a left-handed structure based on a photonic crystal (PC) with a negative refractive index. The structure consists of triangular array of rectangular dielectric bars with dielectric constant 9.61. Experimental and theoretical results demonstrate the negative refraction and the superlensing phenomena in the microwave regime. The results show high transmission for our structure for a wide range of incident angles. Furthermore, surface termination within a specific cut of the structure excite surface waves at the interface between air and PC and allow the reconstruction of evanescent waves for a better focus and better transmission. The normalized average field intensity calculated in both the source and image planes shows almost the same full width at half maximum for the source and the focused beam.

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