From: Leonardo Gonzalez (magos@extropian.net)
Date: Tue Apr 08 2003 - 15:55:26 MDT
Wow, exciting stuff! Here is a finding of some limitations, however:
http://www.icmm.csic.es/noticias/prl07403.pdf
Left-Handed Materials Do Not Make a Perfect Lens
By means of an analysis on evanescent waves in left-handed materials (LHM),
we show that within a slab of suc a medium, sandwiched between two positive
refraction media, there is amplification of evanescent waves in ideal
lossless, dispersiveless media; however, contrary to previous claims, this
is limited to a finite width of the slab so that it prevents their
restoration and perfect focusing. We illustrate this by considering their
coupling to propagating waves through a tunnel barrier containing a slab of
LHM. Further, we show that the effect of absorption, necessarily present
in such materials, may drastically change any evanescent amplifying wave
into a decaying one.
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