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

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

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvb..71h5106m&link_type=abstract

Physical Review B, vol. 71, Issue 8, id. 085106

Physics

Optics

57

Wave Optics, Optical Constants, Electromagnetic Wave Propagation, Radiowave Propagation

Scientific paper

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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