2005/07/05 by C. Y. Li, Li, C. Y., J. M. Holt +3
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Other Condensed Matter (cond-mat.other) #cond-mat.mtrl-sci #cond-mat.other
paper · pdf · doi:10.48550/arxiv.cond-mat/0507090
19 pages, 12 figures
arxiv created 2005/07/05 · arxiv updated 2009/12/01
It is shown that perfect imaging of a point source both in near- and far-field regions contradicts electrodynamics although ``superlensing'' is impossible only in the far-field region. These general statements are illustrated by detailed study of evanescent wave propagation in a photonic crystal that is known to be a left-handed medium. An analytical expression for the intensity distribution near the far-field focus is obtained. This distribution contains some novel features and establishes a new ``diffraction limit'' for flat lenses. It is generalized for multiple sources located at different points. The distribution is in very good agreement with computer simulation.