Abstract

A detailed study of evanescent waves in a two-dimensional photonic crystal known to be a left-handed medium for propagating modes is presented. We have not found universal amplification of the evanescent modes, connected with negative µ and ϵ of the bulk photonic crystal. An analytical expression for the intensity distribution near the far-field focus is obtained using diffraction theory. This distribution contains some novel features and establishes a new diffraction limit for flat lenses. The distribution is generalized for multiple sources located at different points and is in very good agreement with computer simulations.

© 2006 Optical Society of America

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